Warnings explained

P is above the scope limit of the edition (210 psf, or 315 psf where the edition allows it).Always printed

For a method gives the result: The design load p is above [210 psf | 315 psf], the limit of this edition, so the standard gives no result. The result shown is from the [method], so check it against the standard document or another method.

For no other method, two and one sided: The design load p is above [210 psf | 315 psf], the limit of this edition, so the standard gives no result and no other method covers this support. No LR and no pass or fail is reported, so check this case by another method.

For sloped glazing, a method gives the result: The total of wind, snow and glass weight is above [210 psf | 315 psf], the limit of this edition, so the standard gives no result. The result shown is from the [method], so check it against the standard document or another method.

For sloped glazing, no other method, two and one sided: The total of wind, snow and glass weight is above [210 psf | 315 psf], the limit of this edition, so the standard gives no result and no other method covers this support. No LR and no pass or fail is reported, so check this case by another method.

[method] is the plate solver for four sided support. The limit depends on the edition.

L, p or AR is outside the chart range, or E1300 gives no laminated glass chart value.Always printed

For two and one sided, monolithic: L or p is outside the chart for this support (L 10 to 144 in, NFL 5 to 209 psf), and no other method covers it. No LR and no pass or fail is reported, so check this case by another method.

For two and one sided, laminated: L or p is outside the laminated glass chart for this support (L 8 to 118 in, NFL 4.2 to 209 psf), and no other method covers it. No LR and no pass or fail is reported, so check this case by another method.

For three sided: AR = a/b is outside the range for three sided support (chart 0.5 to 5, plate solver 0.5 to 10). No LR and no pass or fail is reported, so check this case by another method.

For four sided laminated, E1300 09a or 12a: The laminated glass chart has no value for this case and no other method does, so no LR and no pass or fail is reported. To use Appendix X9, switch to E1300 16 or E1300 24.

For four sided laminated, E1300 16 or 24: The laminated glass chart has no value for this case and no other method does, so no LR and no pass or fail is reported. Check this case by another method.

No other method covers two and one sided support. For laminated glass no other method gives a value either. E1300 16 and E1300 24 offer the Appendix X9 effective thickness method for four sided support.

AR, size and thickness, or p is outside the range of the calculation.Always printed

For AR above 10: AR is above 10, outside the range of the E1300 charts. Verify LR by another method.

For size and thickness: This size and thickness is outside the range of this calculation, so LR is extended beyond it and is less reliable. Verify it by another method.

For design load: p is outside the range of this calculation, so Pb is extended beyond it and is less reliable. Verify it by another method.

You chose a method in place of the default for NFL, w or LS.Always printed

For E1300 value exists: The [quantity] is from the [method], your choice in place of the [default]. It [differs from | equals] the E1300 value, with the deviation in the method panel, so check it against the E1300 document or by another method.

For no E1300 value: The [quantity] is from the [method], your choice in place of the [default]. E1300 has no value for this case, so check it against the E1300 document or by another method.

The method is a user choice; the report names it. The method panel shows the deviation from the E1300 value.

Only one method gives the value.Always printed

For LS, Appendix X3: Only the Appendix X3 equation gives LS, because E1300 Table 5 has no value for this pair of lite thicknesses. Check it against the E1300 document or by another method.

For NFL four sided, plate solver: Only the plate solver gives NFL, because E1300 has no value or appendix equation for this case. Check it against the E1300 document or by another method.

For NFL three sided, plate solver: Only the plate solver gives NFL, because E1300 has no value or appendix equation for this case. It can be less conservative than E1300, so check it against the E1300 document or by another method.

For NFL laminated, Appendix X9: Only the Appendix X9 effective thickness method with the analytical procedure of [E1300 16 6.3.2 | E1300 24 7.3.2] gives NFL, because E1300 has no laminated glass chart value for this case. It can be less conservative than E1300, so check it against the E1300 document or by another method.

Appendix X3 splits the load in proportion to the cube of each lite thickness, as the printed values were. Four sided plate solver: differs from the chart by about 1 percent on average and up to about 3 percent, except for 25 mm glass. Three sided plate solver: linear plate analysis with the Annex A2 failure model, and where the chart prints a value the plate solver gives 1.03 to 2.2 times the chart value. Appendix X9: from about 33 percent less to about 11 percent more than the four sided laminated chart (PVB 0.030 in interlayer, thickness limit on). Verify this result against the E1300 document or by another method.

A thickness override is entered. The second sentence only when t is below the Table 4 minimum or above the nominal designation.Always printed

For within range: Thickness override: t is not the nominal thickness. Check that t is the thickness of the glass you will use.

For outside range: Thickness override: t is not the nominal thickness and is below the Table 4 minimum or above the nominal designation. Check t and the nominal designation.

25 mm glass (chart), or 22 mm glass (two and one sided deflection).Always printed

For 25 mm glass: For 25 mm glass, the E1300 chart gives about 6 percent less load than the Table 4 minimum thickness of 0.969 in, and this result uses [the Table 4 thickness | the chart equivalent thickness of 0.941 in]. Confirm which thickness option for 25 mm glass applies to the project.

For 22 mm glass: For 22 mm glass, the E1300 deflection chart for this support gives about 10 percent more w than beam theory at the Table 4 minimum thickness of 0.844 in, and this result uses the Table 4 thickness. Where deflection governs, verify it by an independent method.

W is reported by a method that is approximate. Appendix X2 replaces X1 under E1300 09a.Always printed

For Appendix X1 or X2: Deflection w is from Appendix [X1 | X2], a curve fit that can differ from the true value by about 10 percent. Where deflection governs, verify it by an independent method.

For Appendix X1 or X2, p below LR/3: Deflection w is from Appendix [X1 | X2], a curve fit that can differ from the true value by about 10 percent and is rough because p is below LR/3. Where deflection governs, verify it by an independent method.

For E1300 chart, four sided: Deflection w is read from the E1300 deflection chart and is approximate. Where deflection governs, verify it by an independent method.

For E1300 chart, three sided: Deflection w at the free edge is read from the E1300 three sided deflection chart and is approximate. Where deflection governs, verify it by an independent method.

For E1300 chart, laminated: Deflection w at the [center of glass | free edge] is read from the E1300 laminated glass deflection chart and is approximate. Where deflection governs, verify it by an independent method.

For beam theory: Deflection w is from linear beam theory at p, the method behind the E1300 chart for this support, and is approximate. Where deflection governs, verify it by an independent method.

For IG: E1300 gives no deflection method for IG, so w of each lite is approximate, from Appendix [X1 | X2] at the share of p that lite carries. Where deflection governs, verify it by an independent method.

Four sided chart: of the nominal thickness, between the printed curves for the two whole AR around this one. Three sided chart: between the printed AR curves, with the curve for 1.5 and above used for every larger AR. Laminated chart: for the designation, between the printed curves for AR 4 and 5 at the center of glass. For IG the load share and the appendix equation are both approximate. Appendix X1 is least reliable at low loads.

AR is above 5 for w.Always printed

AR is above 5, so w is calculated at AR 5 as E1300 requires, and the actual w can be larger. Where deflection governs, verify it by an independent method.

W is greater than t, E1300 12a, 16 and 24 only.Always printed

w is greater than t, so it is rounded to the nearest 0.04 in as E1300 requires. Where the rounding affects the outcome, verify the unrounded w independently.

The rounding step is 0.039 in in an SI check.

No w is reported.Always printed

For very low p: Appendix [X1 | X2] does not apply at this very low p, so no w is reported although w is very small. Where it is required, use a linear plate formula.

For three sided: The design point is outside the E1300 three sided deflection chart for this thickness, and E1300 gives no other deflection method, so no w is reported. Where deflection governs, verify it by an independent method.

Appendix X2 replaces X1 under E1300 09a.

Pb is not reported.

For IG: No Pb is reported for IG, because E1300 gives Pb of IG only in the analytical procedure of [E1300 16 6.3.3 | E1300 24 7.3.3], which GlassLoad.com does not run. Where Pb is required, calculate it by that procedure.

For laminated glass: No Pb is reported for the laminate, because E1300 gives Pb of laminated glass only per ply, in the analytical procedure of [E1300 16 6.3.2 | E1300 24 7.3.2 | E1300 16 6.3.2 and E1300 24 7.3.2]. Where Pb is required, calculate it for each ply by that procedure.

For other supports: No Pb is reported for glass supported on [two opposite edges | one edge | three sides], because E1300 has no procedure for it. Where Pb is required, determine it by another method.

A long duration load and Pb above 8 per 1000 while p is within LR.

For a long duration load, Pb is calculated for a 30 day load with [E1300 16 | E1300 24] Annex A2 and is above 8 per 1000 although p is within LR. The pass or fail result follows Table 1, so confirm that this Pb is acceptable for the project.

Table 1 applies the long duration factor to the load and Annex A2 applies it to the glass stress, so the two differ, most of all when the glass deflects a lot.

Pb is reported for HS or FT glass.Always printed

Pb of [HS | FT] glass is approximate, from the plate solver and [E1300 16 | E1300 24] Annex A2 with a residual surface stress of [3500 psi | 10,000 psi] subtracted. Use it for information only, not as a pass criterion.

HS or FT glass with a load duration other than 3 seconds.Always printed

The load duration factors of Appendix [X4 | X6] were derived for AN glass, so LR for HS or FT glass at this load duration is approximate. Where this load duration governs, verify LR by an independent method.

Two sided, one sided or three sided support.

For two and one sided: E1300 treats glass supported on [two opposite edges as a simply supported beam | one edge as a cantilever], so LR does not depend on the width of the lite. Check that the supports do not deflect more than 1/175 of the length of each supported edge.

For three sided: E1300 treats glass supported on three sides with its three sided charts, where a is the length of the two supported edges that meet the free edge, b is the length of the free edge and AR = a/b. Check that the supports do not deflect more than 1/175 of the length of each supported edge.

For three sided support E1300 uses its three sided charts.

A laminate or a laminated lite of an IG unit is checked.

For laminate: Laminated glass of two plies with an interlayer is read as its thickness designation by E1300 [3.2.4.1 | 3.2.4.2][, where a clause exception sets the designation]. Check that this designation matches your laminate.

For laminated lite of IG: A laminated lite of two plies with an interlayer is read as its thickness designation by E1300 [3.2.4.1 | 3.2.4.2][, where a clause exception sets the designation]. Check that this designation matches your laminate.

For laminated lite of IG, long duration load: A laminated lite of two plies with an interlayer is read as its thickness designation by E1300 [3.2.4.1 | 3.2.4.2][, where a clause exception sets the designation]. For a long duration load, E1300 [6.11 to 6.14 | 6.2.10 to 6.2.13 | 7.2.10 to 7.2.13] gives the unit the lowest of four values, so check that the designation matches your laminate.

The E1300 laminated glass charts are read for this designation. For an IG lite, E1300 reads its NFL from the laminated chart of that designation (PVB interlayer, no hotter than 122 F at the design load) and its LS from Table 5. For a long duration load it also checks the short duration LR of every lite and takes LS from Table 6 for a monolithic lite with a laminated lite (Table 5 for two laminated lites).

A laminate is checked.

The E1300 laminated glass charts are for a PVB interlayer, or one shown equivalent by Appendix [X8 | X10], no hotter than 122 F at the design load. Check your interlayer and its service temperature.

Appendix X10 under E1300 09a, X8 under 12a, 16 and 24.

A laminate under a long duration load.

For a long duration load, E1300 uses the 3 second laminated glass chart with the Table 1 long duration factor and makes no reduction for interlayer creep. Where interlayer creep is significant, assess it separately.

Appendix X9 is used.Always printed

For E1300 value of G: Appendix X9 uses the interlayer shear modulus G for a [3 second load at 122 F | 30 day load at 68 F | 30 day load at 73 F] as [E1300 24 7.3.2.1 | E1300 16 6.3.2.1 | E1300 24 X9.5] gives, with the short dimension b and the interlayer thickness. Check that this load duration and temperature suit your service conditions.

For library interlayer: Appendix X9 uses the interlayer shear modulus G for a [3 second load at 122 F | 30 day load at 68 F | 30 day load at 73 F] as [E1300 24 7.3.2.1 | E1300 16 6.3.2.1 | E1300 24 X9.5] gives, with the short dimension b and the interlayer thickness. G is manufacturer data, not part of E1300 ([source], [quote]), so check it against the current manufacturer data for this load duration and temperature.

For G entered by you: Appendix X9 uses the interlayer shear modulus G for a [3 second load at 122 F | 30 day load at 68 F | 30 day load at 73 F] as [E1300 24 7.3.2.1 | E1300 16 6.3.2.1 | E1300 24 X9.5] gives, with the short dimension b and the interlayer thickness. You entered G, which is not part of E1300, so keep the manufacturer data for this interlayer, load duration and temperature with the calculation.

In Appendix X9, a is the short side, named b here. The load duration and temperature follow the load duration of the check.

Appendix X9 is used and the stress effective thickness limit applies or is off.Always printed

For limit applied: The Appendix X9 stress effective thickness of [the first ply | the second ply | both plies] is above the total glass thickness, so it is limited to that thickness. E1300 sets no such limit and does not check interlayer shear stress, so check the interlayer shear stress separately.

For limit off: You turned off the limit of the Appendix X9 stress effective thickness to the total glass thickness, so X9 can count interlayer depth as glass. E1300 does not check interlayer shear stress, so check the interlayer shear stress separately.

With strong interlayer coupling X9 counts part of the interlayer depth as glass. When the limit is off, the report states that the user turned it off.

W of a laminate is calculated with Appendix X1 or X2 (X2 under E1300 09a).Always printed

For designation thickness chosen: Deflection uses Appendix [X1 | X2] at the thickness t, the Table 4 minimum of the laminate designation, which you chose in place of the Appendix X9 deflection effective thickness. It treats the plies as one lite and can understate w, so where deflection governs, verify it by an independent method.

For Appendix X9 thickness: Deflection uses Appendix [X1 | X2] at the thickness t, the Appendix X9 deflection effective thickness, which depends on G, the load duration and the temperature. Check G, the load duration and the temperature, because w depends on them.

The report states that the designation thickness was chosen.

W of laminated glass comes from Appendix X1 or X2 by a simplified method.Always printed

For E1300 09a, long duration load: Appendix X2 is evaluated for one ply at the share of p that ply carries, so w is approximate. Where deflection governs, verify it by an independent method.

For E1300 09a, short duration load: Appendix X2 is evaluated at the thickness t, the Table 4 minimum of the designation, which treats the plies as one lite, so w can be understated. Where deflection governs, verify it by an independent method.

For E1300 12a, 16 and 24, and laminated lites of IG: Appendix X1 is evaluated at the thickness t, the Table 4 minimum of the designation[ and at the share of p that lite carries], which treats the plies as one lite[ and ignores the interlayer under a long duration load], so w can be understated. Where deflection governs, verify it by an independent method.

E1300 09a X1.1.2 gives the single lite deflection at half of p for a long duration load, which is the share of a ply of equal thickness. E1300 09a X1.1.1 allows Appendix X2 for laminated glass under a short duration load with the laminate thickness designation. E1300 12a gives no thickness for the Appendix X1 deflection of laminated glass (6.6.4 sends a case outside the chart to Appendix X1).

Two and one sided laminated glass.

Beam theory at a maximum stress of 2.4 ksi reproduces the E1300 laminated glass chart for glass supported on [two opposite edges | one edge] within [x] percent, using the effective thickness t_s for LR and t_w for w at the free edge, so w is approximate. Where deflection governs, verify it by an independent method.

The effective thicknesses are those of the printed line of the designation.

An IG unit is checked.

Load sharing uses the load share factors LS, which are approximate, and pressure changes in the air space from temperature and altitude are not included. If the unit is at high altitude or sees large temperature changes, check the air space pressure separately.

LS splits the load in proportion to the cube of each lite thickness. E1300 states that the factors are approximate.

A 4 mm lite beside a 5 mm lite in an IG unit.Always printed

[E1300 16 | E1300 24] Table 5 misprints 0.631 as LS of the 4 mm lite beside a 5 mm lite. The value 0.361 is used, so compare it with your copy of the table.

The two shares of a unit add to 1, and the same table prints 0.361 for this pair with the lites in the other order.

A triple unit is checked.

E1300 recommends a combined air space width of at most 1.00 in for a triple unit. [The air spaces are not given, so this is not checked and you should check the combined width yourself. | The sum of the air spaces entered is within this limit, so no further check of the width is needed. | The sum of the air spaces entered is above this limit, so reduce the combined width or check the sealant and glass stresses from temperature and altitude changes.]

A larger width can cause high sealant and glass stresses from temperature and altitude changes. E1300 09a and 12a Note 4, 24 Note 7.

Sloped glass.Always printed

The normal part wn of the glass weight TGW is added to the load on the glass. The part wt along the glass is not checked, so check the setting blocks, supports and fixings separately.

The normal part is the weight times the sine of the angle. E1300 includes self weight in the design load but does not say how to resolve it on sloped glass.

A snow load on sloped glass.Always printed

The snow load S is given per horizontal projected area, so the load normal to the glass is S times f. Check that your S is given per horizontal projected area.

f is the square of the sine of the angle from vertical, to 3 decimals. E1300 does not give this conversion.

Loads of different durations act together.

Loads acting together are checked at each load duration present, each with every load of that duration or longer. Snow and glass weight are taken as 30 day loads, so check that this suits your load combination.

E1300 checks a load at one duration and does not say which duration a combination has. As in E1300 Example 3, the glass weight is added to p.

HS or FT glass under loads of different durations.Always printed

For E1300 09a, 12a, 16: E1300 [09a Appendix X7 | 12a Appendix X5 | 16 Appendix X5] gives its load duration exponent for AN glass only, so loads of different duration are not combined for [HS | FT] glass. Check the load combination by another method.

For E1300 24: E1300 24 Appendix X5 uses one load duration exponent for all glass types, so [HS | FT] glass is allowed only [65 | 57] percent of the 30 day load that Table 1 allows. Check the load combination by another method if you rely on the residual surface compression.

E1300 24 does not credit the residual surface compression.

An outward load on sloped glass.Always printed

The outward load is checked [without relief from the glass weight | with the full glass weight normal to the glass as relief | with 0.6 times the glass weight normal to the glass as relief]. E1300 gives no such relief, so confirm that this setting is appropriate for the project.

The 0.6 factor is from the ASCE 7 uplift load combinations.

P is above the scope limit of the edition (210 psf, or 315 psf where the edition allows it).Always printed

For a method gives the result: The design load p is above [210 psf | 315 psf], the limit of this edition, so the standard gives no result. The result shown is from the [method], so check it against the standard document or another method.

For no other method, two and one sided: The design load p is above [210 psf | 315 psf], the limit of this edition, so the standard gives no result and no other method covers this support. No LR and no pass or fail is reported, so check this case by another method.

For sloped glazing, a method gives the result: The total of wind, snow and glass weight is above [210 psf | 315 psf], the limit of this edition, so the standard gives no result. The result shown is from the [method], so check it against the standard document or another method.

For sloped glazing, no other method, two and one sided: The total of wind, snow and glass weight is above [210 psf | 315 psf], the limit of this edition, so the standard gives no result and no other method covers this support. No LR and no pass or fail is reported, so check this case by another method.

[method] is the plate solver for four sided support. The limit depends on the edition.

L, p or AR is outside the chart range, or E1300 gives no laminated glass chart value.Always printed

For two and one sided, monolithic: L or p is outside the chart for this support (L 10 to 144 in, NFL 5 to 209 psf), and no other method covers it. No LR and no pass or fail is reported, so check this case by another method.

For two and one sided, laminated: L or p is outside the laminated glass chart for this support (L 8 to 118 in, NFL 4.2 to 209 psf), and no other method covers it. No LR and no pass or fail is reported, so check this case by another method.

For three sided: AR = a/b is outside the range for three sided support (chart 0.5 to 5, plate solver 0.5 to 10). No LR and no pass or fail is reported, so check this case by another method.

For four sided laminated, E1300 09a or 12a: The laminated glass chart has no value for this case and no other method does, so no LR and no pass or fail is reported. To use Appendix X9, switch to E1300 16 or E1300 24.

For four sided laminated, E1300 16 or 24: The laminated glass chart has no value for this case and no other method does, so no LR and no pass or fail is reported. Check this case by another method.

No other method covers two and one sided support. For laminated glass no other method gives a value either. E1300 16 and E1300 24 offer the Appendix X9 effective thickness method for four sided support.

AR, size and thickness, or p is outside the range of the calculation.Always printed

For AR above 10: AR is above 10, outside the range of the E1300 charts. Verify LR by another method.

For size and thickness: This size and thickness is outside the range of this calculation, so LR is extended beyond it and is less reliable. Verify it by another method.

For design load: p is outside the range of this calculation, so Pb is extended beyond it and is less reliable. Verify it by another method.

You chose a method in place of the default for NFL, w or LS.Always printed

For E1300 value exists: The [quantity] is from the [method], your choice in place of the [default]. It [differs from | equals] the E1300 value, with the deviation in the method panel, so check it against the E1300 document or by another method.

For no E1300 value: The [quantity] is from the [method], your choice in place of the [default]. E1300 has no value for this case, so check it against the E1300 document or by another method.

The method is a user choice; the report names it. The method panel shows the deviation from the E1300 value.

Only one method gives the value.Always printed

For LS, Appendix X3: Only the Appendix X3 equation gives LS, because E1300 Table 5 has no value for this pair of lite thicknesses. Check it against the E1300 document or by another method.

For NFL four sided, plate solver: Only the plate solver gives NFL, because E1300 has no value or appendix equation for this case. Check it against the E1300 document or by another method.

For NFL three sided, plate solver: Only the plate solver gives NFL, because E1300 has no value or appendix equation for this case. It can be less conservative than E1300, so check it against the E1300 document or by another method.

For NFL laminated, Appendix X9: Only the Appendix X9 effective thickness method with the analytical procedure of [E1300 16 6.3.2 | E1300 24 7.3.2] gives NFL, because E1300 has no laminated glass chart value for this case. It can be less conservative than E1300, so check it against the E1300 document or by another method.

Appendix X3 splits the load in proportion to the cube of each lite thickness, as the printed values were. Four sided plate solver: differs from the chart by about 1 percent on average and up to about 3 percent, except for 25 mm glass. Three sided plate solver: linear plate analysis with the Annex A2 failure model, and where the chart prints a value the plate solver gives 1.03 to 2.2 times the chart value. Appendix X9: from about 33 percent less to about 11 percent more than the four sided laminated chart (PVB 0.030 in interlayer, thickness limit on). Verify this result against the E1300 document or by another method.

A thickness override is entered. The second sentence only when t is below the Table 4 minimum or above the nominal designation.Always printed

For within range: Thickness override: t is not the nominal thickness. Check that t is the thickness of the glass you will use.

For outside range: Thickness override: t is not the nominal thickness and is below the Table 4 minimum or above the nominal designation. Check t and the nominal designation.

25 mm glass (chart), or 22 mm glass (two and one sided deflection).Always printed

For 25 mm glass: For 25 mm glass, the E1300 chart gives about 6 percent less load than the Table 4 minimum thickness of 0.969 in, and this result uses [the Table 4 thickness | the chart equivalent thickness of 0.941 in]. Confirm which thickness option for 25 mm glass applies to the project.

For 22 mm glass: For 22 mm glass, the E1300 deflection chart for this support gives about 10 percent more w than beam theory at the Table 4 minimum thickness of 0.844 in, and this result uses the Table 4 thickness. Where deflection governs, verify it by an independent method.

W is reported by a method that is approximate. Appendix X2 replaces X1 under E1300 09a.Always printed

For Appendix X1 or X2: Deflection w is from Appendix [X1 | X2], a curve fit that can differ from the true value by about 10 percent. Where deflection governs, verify it by an independent method.

For Appendix X1 or X2, p below LR/3: Deflection w is from Appendix [X1 | X2], a curve fit that can differ from the true value by about 10 percent and is rough because p is below LR/3. Where deflection governs, verify it by an independent method.

For E1300 chart, four sided: Deflection w is read from the E1300 deflection chart and is approximate. Where deflection governs, verify it by an independent method.

For E1300 chart, three sided: Deflection w at the free edge is read from the E1300 three sided deflection chart and is approximate. Where deflection governs, verify it by an independent method.

For E1300 chart, laminated: Deflection w at the [center of glass | free edge] is read from the E1300 laminated glass deflection chart and is approximate. Where deflection governs, verify it by an independent method.

For beam theory: Deflection w is from linear beam theory at p, the method behind the E1300 chart for this support, and is approximate. Where deflection governs, verify it by an independent method.

For IG: E1300 gives no deflection method for IG, so w of each lite is approximate, from Appendix [X1 | X2] at the share of p that lite carries. Where deflection governs, verify it by an independent method.

Four sided chart: of the nominal thickness, between the printed curves for the two whole AR around this one. Three sided chart: between the printed AR curves, with the curve for 1.5 and above used for every larger AR. Laminated chart: for the designation, between the printed curves for AR 4 and 5 at the center of glass. For IG the load share and the appendix equation are both approximate. Appendix X1 is least reliable at low loads.

AR is above 5 for w.Always printed

AR is above 5, so w is calculated at AR 5 as E1300 requires, and the actual w can be larger. Where deflection governs, verify it by an independent method.

W is greater than t, E1300 12a, 16 and 24 only.Always printed

w is greater than t, so it is rounded to the nearest 0.04 in as E1300 requires. Where the rounding affects the outcome, verify the unrounded w independently.

The rounding step is 0.039 in in an SI check.

No w is reported.Always printed

For very low p: Appendix [X1 | X2] does not apply at this very low p, so no w is reported although w is very small. Where it is required, use a linear plate formula.

For three sided: The design point is outside the E1300 three sided deflection chart for this thickness, and E1300 gives no other deflection method, so no w is reported. Where deflection governs, verify it by an independent method.

Appendix X2 replaces X1 under E1300 09a.

Pb is not reported.

For IG: No Pb is reported for IG, because E1300 gives Pb of IG only in the analytical procedure of [E1300 16 6.3.3 | E1300 24 7.3.3], which GlassLoad.com does not run. Where Pb is required, calculate it by that procedure.

For laminated glass: No Pb is reported for the laminate, because E1300 gives Pb of laminated glass only per ply, in the analytical procedure of [E1300 16 6.3.2 | E1300 24 7.3.2 | E1300 16 6.3.2 and E1300 24 7.3.2]. Where Pb is required, calculate it for each ply by that procedure.

For other supports: No Pb is reported for glass supported on [two opposite edges | one edge | three sides], because E1300 has no procedure for it. Where Pb is required, determine it by another method.

A long duration load and Pb above 8 per 1000 while p is within LR.

For a long duration load, Pb is calculated for a 30 day load with [E1300 16 | E1300 24] Annex A2 and is above 8 per 1000 although p is within LR. The pass or fail result follows Table 1, so confirm that this Pb is acceptable for the project.

Table 1 applies the long duration factor to the load and Annex A2 applies it to the glass stress, so the two differ, most of all when the glass deflects a lot.

Pb is reported for HS or FT glass.Always printed

Pb of [HS | FT] glass is approximate, from the plate solver and [E1300 16 | E1300 24] Annex A2 with a residual surface stress of [3500 psi | 10,000 psi] subtracted. Use it for information only, not as a pass criterion.

HS or FT glass with a load duration other than 3 seconds.Always printed

The load duration factors of Appendix [X4 | X6] were derived for AN glass, so LR for HS or FT glass at this load duration is approximate. Where this load duration governs, verify LR by an independent method.

Two sided, one sided or three sided support.

For two and one sided: E1300 treats glass supported on [two opposite edges as a simply supported beam | one edge as a cantilever], so LR does not depend on the width of the lite. Check that the supports do not deflect more than 1/175 of the length of each supported edge.

For three sided: E1300 treats glass supported on three sides with its three sided charts, where a is the length of the two supported edges that meet the free edge, b is the length of the free edge and AR = a/b. Check that the supports do not deflect more than 1/175 of the length of each supported edge.

For three sided support E1300 uses its three sided charts.

A laminate or a laminated lite of an IG unit is checked.

For laminate: Laminated glass of two plies with an interlayer is read as its thickness designation by E1300 [3.2.4.1 | 3.2.4.2][, where a clause exception sets the designation]. Check that this designation matches your laminate.

For laminated lite of IG: A laminated lite of two plies with an interlayer is read as its thickness designation by E1300 [3.2.4.1 | 3.2.4.2][, where a clause exception sets the designation]. Check that this designation matches your laminate.

For laminated lite of IG, long duration load: A laminated lite of two plies with an interlayer is read as its thickness designation by E1300 [3.2.4.1 | 3.2.4.2][, where a clause exception sets the designation]. For a long duration load, E1300 [6.11 to 6.14 | 6.2.10 to 6.2.13 | 7.2.10 to 7.2.13] gives the unit the lowest of four values, so check that the designation matches your laminate.

The E1300 laminated glass charts are read for this designation. For an IG lite, E1300 reads its NFL from the laminated chart of that designation (PVB interlayer, no hotter than 122 F at the design load) and its LS from Table 5. For a long duration load it also checks the short duration LR of every lite and takes LS from Table 6 for a monolithic lite with a laminated lite (Table 5 for two laminated lites).

A laminate is checked.

The E1300 laminated glass charts are for a PVB interlayer, or one shown equivalent by Appendix [X8 | X10], no hotter than 122 F at the design load. Check your interlayer and its service temperature.

Appendix X10 under E1300 09a, X8 under 12a, 16 and 24.

A laminate under a long duration load.

For a long duration load, E1300 uses the 3 second laminated glass chart with the Table 1 long duration factor and makes no reduction for interlayer creep. Where interlayer creep is significant, assess it separately.

Appendix X9 is used.Always printed

For E1300 value of G: Appendix X9 uses the interlayer shear modulus G for a [3 second load at 122 F | 30 day load at 68 F | 30 day load at 73 F] as [E1300 24 7.3.2.1 | E1300 16 6.3.2.1 | E1300 24 X9.5] gives, with the short dimension b and the interlayer thickness. Check that this load duration and temperature suit your service conditions.

For library interlayer: Appendix X9 uses the interlayer shear modulus G for a [3 second load at 122 F | 30 day load at 68 F | 30 day load at 73 F] as [E1300 24 7.3.2.1 | E1300 16 6.3.2.1 | E1300 24 X9.5] gives, with the short dimension b and the interlayer thickness. G is manufacturer data, not part of E1300 ([source], [quote]), so check it against the current manufacturer data for this load duration and temperature.

For G entered by you: Appendix X9 uses the interlayer shear modulus G for a [3 second load at 122 F | 30 day load at 68 F | 30 day load at 73 F] as [E1300 24 7.3.2.1 | E1300 16 6.3.2.1 | E1300 24 X9.5] gives, with the short dimension b and the interlayer thickness. You entered G, which is not part of E1300, so keep the manufacturer data for this interlayer, load duration and temperature with the calculation.

In Appendix X9, a is the short side, named b here. The load duration and temperature follow the load duration of the check.

Appendix X9 is used and the stress effective thickness limit applies or is off.Always printed

For limit applied: The Appendix X9 stress effective thickness of [the first ply | the second ply | both plies] is above the total glass thickness, so it is limited to that thickness. E1300 sets no such limit and does not check interlayer shear stress, so check the interlayer shear stress separately.

For limit off: You turned off the limit of the Appendix X9 stress effective thickness to the total glass thickness, so X9 can count interlayer depth as glass. E1300 does not check interlayer shear stress, so check the interlayer shear stress separately.

With strong interlayer coupling X9 counts part of the interlayer depth as glass. When the limit is off, the report states that the user turned it off.

W of a laminate is calculated with Appendix X1 or X2 (X2 under E1300 09a).Always printed

For designation thickness chosen: Deflection uses Appendix [X1 | X2] at the thickness t, the Table 4 minimum of the laminate designation, which you chose in place of the Appendix X9 deflection effective thickness. It treats the plies as one lite and can understate w, so where deflection governs, verify it by an independent method.

For Appendix X9 thickness: Deflection uses Appendix [X1 | X2] at the thickness t, the Appendix X9 deflection effective thickness, which depends on G, the load duration and the temperature. Check G, the load duration and the temperature, because w depends on them.

The report states that the designation thickness was chosen.

W of laminated glass comes from Appendix X1 or X2 by a simplified method.Always printed

For E1300 09a, long duration load: Appendix X2 is evaluated for one ply at the share of p that ply carries, so w is approximate. Where deflection governs, verify it by an independent method.

For E1300 09a, short duration load: Appendix X2 is evaluated at the thickness t, the Table 4 minimum of the designation, which treats the plies as one lite, so w can be understated. Where deflection governs, verify it by an independent method.

For E1300 12a, 16 and 24, and laminated lites of IG: Appendix X1 is evaluated at the thickness t, the Table 4 minimum of the designation[ and at the share of p that lite carries], which treats the plies as one lite[ and ignores the interlayer under a long duration load], so w can be understated. Where deflection governs, verify it by an independent method.

E1300 09a X1.1.2 gives the single lite deflection at half of p for a long duration load, which is the share of a ply of equal thickness. E1300 09a X1.1.1 allows Appendix X2 for laminated glass under a short duration load with the laminate thickness designation. E1300 12a gives no thickness for the Appendix X1 deflection of laminated glass (6.6.4 sends a case outside the chart to Appendix X1).

Two and one sided laminated glass.

Beam theory at a maximum stress of 2.4 ksi reproduces the E1300 laminated glass chart for glass supported on [two opposite edges | one edge] within [x] percent, using the effective thickness t_s for LR and t_w for w at the free edge, so w is approximate. Where deflection governs, verify it by an independent method.

The effective thicknesses are those of the printed line of the designation.

An IG unit is checked.

Load sharing uses the load share factors LS, which are approximate, and pressure changes in the air space from temperature and altitude are not included. If the unit is at high altitude or sees large temperature changes, check the air space pressure separately.

LS splits the load in proportion to the cube of each lite thickness. E1300 states that the factors are approximate.

A 4 mm lite beside a 5 mm lite in an IG unit.Always printed

[E1300 16 | E1300 24] Table 5 misprints 0.631 as LS of the 4 mm lite beside a 5 mm lite. The value 0.361 is used, so compare it with your copy of the table.

The two shares of a unit add to 1, and the same table prints 0.361 for this pair with the lites in the other order.

A triple unit is checked.

E1300 recommends a combined air space width of at most 1.00 in for a triple unit. [The air spaces are not given, so this is not checked and you should check the combined width yourself. | The sum of the air spaces entered is within this limit, so no further check of the width is needed. | The sum of the air spaces entered is above this limit, so reduce the combined width or check the sealant and glass stresses from temperature and altitude changes.]

A larger width can cause high sealant and glass stresses from temperature and altitude changes. E1300 09a and 12a Note 4, 24 Note 7.

Sloped glass.Always printed

The normal part wn of the glass weight TGW is added to the load on the glass. The part wt along the glass is not checked, so check the setting blocks, supports and fixings separately.

The normal part is the weight times the sine of the angle. E1300 includes self weight in the design load but does not say how to resolve it on sloped glass.

A snow load on sloped glass.Always printed

The snow load S is given per horizontal projected area, so the load normal to the glass is S times f. Check that your S is given per horizontal projected area.

f is the square of the sine of the angle from vertical, to 3 decimals. E1300 does not give this conversion.

Loads of different durations act together.

Loads acting together are checked at each load duration present, each with every load of that duration or longer. Snow and glass weight are taken as 30 day loads, so check that this suits your load combination.

E1300 checks a load at one duration and does not say which duration a combination has. As in E1300 Example 3, the glass weight is added to p.

HS or FT glass under loads of different durations.Always printed

For E1300 09a, 12a, 16: E1300 [09a Appendix X7 | 12a Appendix X5 | 16 Appendix X5] gives its load duration exponent for AN glass only, so loads of different duration are not combined for [HS | FT] glass. Check the load combination by another method.

For E1300 24: E1300 24 Appendix X5 uses one load duration exponent for all glass types, so [HS | FT] glass is allowed only [65 | 57] percent of the 30 day load that Table 1 allows. Check the load combination by another method if you rely on the residual surface compression.

E1300 24 does not credit the residual surface compression.

An outward load on sloped glass.Always printed

The outward load is checked [without relief from the glass weight | with the full glass weight normal to the glass as relief | with 0.6 times the glass weight normal to the glass as relief]. E1300 gives no such relief, so confirm that this setting is appropriate for the project.

The 0.6 factor is from the ASCE 7 uplift load combinations.

P is above the scope limit of the edition (210 psf, or 315 psf where the edition allows it).Always printed

For a method gives the result: The design load p is above [210 psf | 315 psf], the limit of this edition, so the standard gives no result. The result shown is from the [method], so check it against the standard document or another method.

For no other method, two and one sided: The design load p is above [210 psf | 315 psf], the limit of this edition, so the standard gives no result and no other method covers this support. No LR and no pass or fail is reported, so check this case by another method.

For sloped glazing, a method gives the result: The total of wind, snow and glass weight is above [210 psf | 315 psf], the limit of this edition, so the standard gives no result. The result shown is from the [method], so check it against the standard document or another method.

For sloped glazing, no other method, two and one sided: The total of wind, snow and glass weight is above [210 psf | 315 psf], the limit of this edition, so the standard gives no result and no other method covers this support. No LR and no pass or fail is reported, so check this case by another method.

[method] is the plate solver for four sided support. The limit depends on the edition.

L, p or AR is outside the chart range, or E1300 gives no laminated glass chart value.Always printed

For two and one sided, monolithic: L or p is outside the chart for this support (L 10 to 144 in, NFL 5 to 209 psf), and no other method covers it. No LR and no pass or fail is reported, so check this case by another method.

For two and one sided, laminated: L or p is outside the laminated glass chart for this support (L 8 to 118 in, NFL 4.2 to 209 psf), and no other method covers it. No LR and no pass or fail is reported, so check this case by another method.

For three sided: AR = a/b is outside the range for three sided support (chart 0.5 to 5, plate solver 0.5 to 10). No LR and no pass or fail is reported, so check this case by another method.

For four sided laminated, E1300 09a or 12a: The laminated glass chart has no value for this case and no other method does, so no LR and no pass or fail is reported. To use Appendix X9, switch to E1300 16 or E1300 24.

For four sided laminated, E1300 16 or 24: The laminated glass chart has no value for this case and no other method does, so no LR and no pass or fail is reported. Check this case by another method.

No other method covers two and one sided support. For laminated glass no other method gives a value either. E1300 16 and E1300 24 offer the Appendix X9 effective thickness method for four sided support.

AR, size and thickness, or p is outside the range of the calculation.Always printed

For AR above 10: AR is above 10, outside the range of the E1300 charts. Verify LR by another method.

For size and thickness: This size and thickness is outside the range of this calculation, so LR is extended beyond it and is less reliable. Verify it by another method.

For design load: p is outside the range of this calculation, so Pb is extended beyond it and is less reliable. Verify it by another method.

You chose a method in place of the default for NFL, w or LS.Always printed

For E1300 value exists: The [quantity] is from the [method], your choice in place of the [default]. It [differs from | equals] the E1300 value, with the deviation in the method panel, so check it against the E1300 document or by another method.

For no E1300 value: The [quantity] is from the [method], your choice in place of the [default]. E1300 has no value for this case, so check it against the E1300 document or by another method.

The method is a user choice; the report names it. The method panel shows the deviation from the E1300 value.

Only one method gives the value.Always printed

For LS, Appendix X3: Only the Appendix X3 equation gives LS, because E1300 Table 5 has no value for this pair of lite thicknesses. Check it against the E1300 document or by another method.

For NFL four sided, plate solver: Only the plate solver gives NFL, because E1300 has no value or appendix equation for this case. Check it against the E1300 document or by another method.

For NFL three sided, plate solver: Only the plate solver gives NFL, because E1300 has no value or appendix equation for this case. It can be less conservative than E1300, so check it against the E1300 document or by another method.

For NFL laminated, Appendix X9: Only the Appendix X9 effective thickness method with the analytical procedure of [E1300 16 6.3.2 | E1300 24 7.3.2] gives NFL, because E1300 has no laminated glass chart value for this case. It can be less conservative than E1300, so check it against the E1300 document or by another method.

Appendix X3 splits the load in proportion to the cube of each lite thickness, as the printed values were. Four sided plate solver: differs from the chart by about 1 percent on average and up to about 3 percent, except for 25 mm glass. Three sided plate solver: linear plate analysis with the Annex A2 failure model, and where the chart prints a value the plate solver gives 1.03 to 2.2 times the chart value. Appendix X9: from about 33 percent less to about 11 percent more than the four sided laminated chart (PVB 0.030 in interlayer, thickness limit on). Verify this result against the E1300 document or by another method.

A thickness override is entered. The second sentence only when t is below the Table 4 minimum or above the nominal designation.Always printed

For within range: Thickness override: t is not the nominal thickness. Check that t is the thickness of the glass you will use.

For outside range: Thickness override: t is not the nominal thickness and is below the Table 4 minimum or above the nominal designation. Check t and the nominal designation.

25 mm glass (chart), or 22 mm glass (two and one sided deflection).Always printed

For 25 mm glass: For 25 mm glass, the E1300 chart gives about 6 percent less load than the Table 4 minimum thickness of 0.969 in, and this result uses [the Table 4 thickness | the chart equivalent thickness of 0.941 in]. Confirm which thickness option for 25 mm glass applies to the project.

For 22 mm glass: For 22 mm glass, the E1300 deflection chart for this support gives about 10 percent more w than beam theory at the Table 4 minimum thickness of 0.844 in, and this result uses the Table 4 thickness. Where deflection governs, verify it by an independent method.

W is reported by a method that is approximate. Appendix X2 replaces X1 under E1300 09a.Always printed

For Appendix X1 or X2: Deflection w is from Appendix [X1 | X2], a curve fit that can differ from the true value by about 10 percent. Where deflection governs, verify it by an independent method.

For Appendix X1 or X2, p below LR/3: Deflection w is from Appendix [X1 | X2], a curve fit that can differ from the true value by about 10 percent and is rough because p is below LR/3. Where deflection governs, verify it by an independent method.

For E1300 chart, four sided: Deflection w is read from the E1300 deflection chart and is approximate. Where deflection governs, verify it by an independent method.

For E1300 chart, three sided: Deflection w at the free edge is read from the E1300 three sided deflection chart and is approximate. Where deflection governs, verify it by an independent method.

For E1300 chart, laminated: Deflection w at the [center of glass | free edge] is read from the E1300 laminated glass deflection chart and is approximate. Where deflection governs, verify it by an independent method.

For beam theory: Deflection w is from linear beam theory at p, the method behind the E1300 chart for this support, and is approximate. Where deflection governs, verify it by an independent method.

For IG: E1300 gives no deflection method for IG, so w of each lite is approximate, from Appendix [X1 | X2] at the share of p that lite carries. Where deflection governs, verify it by an independent method.

Four sided chart: of the nominal thickness, between the printed curves for the two whole AR around this one. Three sided chart: between the printed AR curves, with the curve for 1.5 and above used for every larger AR. Laminated chart: for the designation, between the printed curves for AR 4 and 5 at the center of glass. For IG the load share and the appendix equation are both approximate. Appendix X1 is least reliable at low loads.

AR is above 5 for w.Always printed

AR is above 5, so w is calculated at AR 5 as E1300 requires, and the actual w can be larger. Where deflection governs, verify it by an independent method.

W is greater than t, E1300 12a, 16 and 24 only.Always printed

w is greater than t, so it is rounded to the nearest 0.04 in as E1300 requires. Where the rounding affects the outcome, verify the unrounded w independently.

The rounding step is 0.039 in in an SI check.

No w is reported.Always printed

For very low p: Appendix [X1 | X2] does not apply at this very low p, so no w is reported although w is very small. Where it is required, use a linear plate formula.

For three sided: The design point is outside the E1300 three sided deflection chart for this thickness, and E1300 gives no other deflection method, so no w is reported. Where deflection governs, verify it by an independent method.

Appendix X2 replaces X1 under E1300 09a.

Pb is not reported.

For IG: No Pb is reported for IG, because E1300 gives Pb of IG only in the analytical procedure of [E1300 16 6.3.3 | E1300 24 7.3.3], which GlassLoad.com does not run. Where Pb is required, calculate it by that procedure.

For laminated glass: No Pb is reported for the laminate, because E1300 gives Pb of laminated glass only per ply, in the analytical procedure of [E1300 16 6.3.2 | E1300 24 7.3.2 | E1300 16 6.3.2 and E1300 24 7.3.2]. Where Pb is required, calculate it for each ply by that procedure.

For other supports: No Pb is reported for glass supported on [two opposite edges | one edge | three sides], because E1300 has no procedure for it. Where Pb is required, determine it by another method.

A long duration load and Pb above 8 per 1000 while p is within LR.

For a long duration load, Pb is calculated for a 30 day load with [E1300 16 | E1300 24] Annex A2 and is above 8 per 1000 although p is within LR. The pass or fail result follows Table 1, so confirm that this Pb is acceptable for the project.

Table 1 applies the long duration factor to the load and Annex A2 applies it to the glass stress, so the two differ, most of all when the glass deflects a lot.

Pb is reported under E1300 09a or 12a.Always printed

[Appendix X3 gives only an approximate method for Pb, for a 60 s load, | This edition has no procedure for Pb,] so the value shown uses the failure model of E1300 24 Annex A2. Treat this Pb as approximate.

The failure model is the one behind the E1300 NFL charts.

Pb is reported for HS or FT glass.Always printed

Pb of [HS | FT] glass is approximate, from the plate solver and [E1300 16 | E1300 24] Annex A2 with a residual surface stress of [3500 psi | 10,000 psi] subtracted. Use it for information only, not as a pass criterion.

HS or FT glass with a load duration other than 3 seconds.Always printed

The load duration factors of Appendix [X4 | X6] were derived for AN glass, so LR for HS or FT glass at this load duration is approximate. Where this load duration governs, verify LR by an independent method.

Two sided, one sided or three sided support.

For two and one sided: E1300 treats glass supported on [two opposite edges as a simply supported beam | one edge as a cantilever], so LR does not depend on the width of the lite. Check that the supports do not deflect more than 1/175 of the length of each supported edge.

For three sided: E1300 treats glass supported on three sides with its three sided charts, where a is the length of the two supported edges that meet the free edge, b is the length of the free edge and AR = a/b. Check that the supports do not deflect more than 1/175 of the length of each supported edge.

For three sided support E1300 uses its three sided charts.

A laminate or a laminated lite of an IG unit is checked.

For laminate: Laminated glass of two plies with an interlayer is read as its thickness designation by E1300 [3.2.4.1 | 3.2.4.2][, where a clause exception sets the designation]. Check that this designation matches your laminate.

For laminated lite of IG: A laminated lite of two plies with an interlayer is read as its thickness designation by E1300 [3.2.4.1 | 3.2.4.2][, where a clause exception sets the designation]. Check that this designation matches your laminate.

For laminated lite of IG, long duration load: A laminated lite of two plies with an interlayer is read as its thickness designation by E1300 [3.2.4.1 | 3.2.4.2][, where a clause exception sets the designation]. For a long duration load, E1300 [6.11 to 6.14 | 6.2.10 to 6.2.13 | 7.2.10 to 7.2.13] gives the unit the lowest of four values, so check that the designation matches your laminate.

The E1300 laminated glass charts are read for this designation. For an IG lite, E1300 reads its NFL from the laminated chart of that designation (PVB interlayer, no hotter than 122 F at the design load) and its LS from Table 5. For a long duration load it also checks the short duration LR of every lite and takes LS from Table 6 for a monolithic lite with a laminated lite (Table 5 for two laminated lites).

A laminate is checked.

The E1300 laminated glass charts are for a PVB interlayer, or one shown equivalent by Appendix [X8 | X10], no hotter than 122 F at the design load. Check your interlayer and its service temperature.

Appendix X10 under E1300 09a, X8 under 12a, 16 and 24.

Four sided laminated glass under E1300 09a or 12a.Always printed

This edition has no analytical procedure for laminated glass, so Appendix X9 gives no value. To use it, switch to E1300 16 or E1300 24.

A laminate under a long duration load.

For a long duration load, E1300 uses the 3 second laminated glass chart with the Table 1 long duration factor and makes no reduction for interlayer creep. Where interlayer creep is significant, assess it separately.

W of a laminate is calculated with Appendix X1 or X2 (X2 under E1300 09a).Always printed

For designation thickness chosen: Deflection uses Appendix [X1 | X2] at the thickness t, the Table 4 minimum of the laminate designation, which you chose in place of the Appendix X9 deflection effective thickness. It treats the plies as one lite and can understate w, so where deflection governs, verify it by an independent method.

For Appendix X9 thickness: Deflection uses Appendix [X1 | X2] at the thickness t, the Appendix X9 deflection effective thickness, which depends on G, the load duration and the temperature. Check G, the load duration and the temperature, because w depends on them.

The report states that the designation thickness was chosen.

W of laminated glass comes from Appendix X1 or X2 by a simplified method.Always printed

For E1300 09a, long duration load: Appendix X2 is evaluated for one ply at the share of p that ply carries, so w is approximate. Where deflection governs, verify it by an independent method.

For E1300 09a, short duration load: Appendix X2 is evaluated at the thickness t, the Table 4 minimum of the designation, which treats the plies as one lite, so w can be understated. Where deflection governs, verify it by an independent method.

For E1300 12a, 16 and 24, and laminated lites of IG: Appendix X1 is evaluated at the thickness t, the Table 4 minimum of the designation[ and at the share of p that lite carries], which treats the plies as one lite[ and ignores the interlayer under a long duration load], so w can be understated. Where deflection governs, verify it by an independent method.

E1300 09a X1.1.2 gives the single lite deflection at half of p for a long duration load, which is the share of a ply of equal thickness. E1300 09a X1.1.1 allows Appendix X2 for laminated glass under a short duration load with the laminate thickness designation. E1300 12a gives no thickness for the Appendix X1 deflection of laminated glass (6.6.4 sends a case outside the chart to Appendix X1).

Two and one sided laminated glass.

Beam theory at a maximum stress of 2.4 ksi reproduces the E1300 laminated glass chart for glass supported on [two opposite edges | one edge] within [x] percent, using the effective thickness t_s for LR and t_w for w at the free edge, so w is approximate. Where deflection governs, verify it by an independent method.

The effective thicknesses are those of the printed line of the designation.

An IG unit is checked.

Load sharing uses the load share factors LS, which are approximate, and pressure changes in the air space from temperature and altitude are not included. If the unit is at high altitude or sees large temperature changes, check the air space pressure separately.

LS splits the load in proportion to the cube of each lite thickness. E1300 states that the factors are approximate.

A triple unit is checked.

E1300 recommends a combined air space width of at most 1.00 in for a triple unit. [The air spaces are not given, so this is not checked and you should check the combined width yourself. | The sum of the air spaces entered is within this limit, so no further check of the width is needed. | The sum of the air spaces entered is above this limit, so reduce the combined width or check the sealant and glass stresses from temperature and altitude changes.]

A larger width can cause high sealant and glass stresses from temperature and altitude changes. E1300 09a and 12a Note 4, 24 Note 7.

Sloped glass.Always printed

The normal part wn of the glass weight TGW is added to the load on the glass. The part wt along the glass is not checked, so check the setting blocks, supports and fixings separately.

The normal part is the weight times the sine of the angle. E1300 includes self weight in the design load but does not say how to resolve it on sloped glass.

A snow load on sloped glass.Always printed

The snow load S is given per horizontal projected area, so the load normal to the glass is S times f. Check that your S is given per horizontal projected area.

f is the square of the sine of the angle from vertical, to 3 decimals. E1300 does not give this conversion.

Loads of different durations act together.

Loads acting together are checked at each load duration present, each with every load of that duration or longer. Snow and glass weight are taken as 30 day loads, so check that this suits your load combination.

E1300 checks a load at one duration and does not say which duration a combination has. As in E1300 Example 3, the glass weight is added to p.

HS or FT glass under loads of different durations.Always printed

For E1300 09a, 12a, 16: E1300 [09a Appendix X7 | 12a Appendix X5 | 16 Appendix X5] gives its load duration exponent for AN glass only, so loads of different duration are not combined for [HS | FT] glass. Check the load combination by another method.

For E1300 24: E1300 24 Appendix X5 uses one load duration exponent for all glass types, so [HS | FT] glass is allowed only [65 | 57] percent of the 30 day load that Table 1 allows. Check the load combination by another method if you rely on the residual surface compression.

E1300 24 does not credit the residual surface compression.

An outward load on sloped glass.Always printed

The outward load is checked [without relief from the glass weight | with the full glass weight normal to the glass as relief | with 0.6 times the glass weight normal to the glass as relief]. E1300 gives no such relief, so confirm that this setting is appropriate for the project.

The 0.6 factor is from the ASCE 7 uplift load combinations.

A double glazed unit on a slope under E1300 09a or 12a.Always printed

The glass weight of the unit is added as the share wn times LSF carried by the governing lite, as in E1300 [09a | 12a] Example 3. Check that this share suits your unit.

LSF is the load share fraction of the lite with the lowest load resistance for the duration of the case. The other loads of the case are added in full.

P is above the scope limit of the edition (210 psf, or 315 psf where the edition allows it).Always printed

For a method gives the result: The design load p is above [210 psf | 315 psf], the limit of this edition, so the standard gives no result. The result shown is from the [method], so check it against the standard document or another method.

For no other method, two and one sided: The design load p is above [210 psf | 315 psf], the limit of this edition, so the standard gives no result and no other method covers this support. No LR and no pass or fail is reported, so check this case by another method.

For sloped glazing, a method gives the result: The total of wind, snow and glass weight is above [210 psf | 315 psf], the limit of this edition, so the standard gives no result. The result shown is from the [method], so check it against the standard document or another method.

For sloped glazing, no other method, two and one sided: The total of wind, snow and glass weight is above [210 psf | 315 psf], the limit of this edition, so the standard gives no result and no other method covers this support. No LR and no pass or fail is reported, so check this case by another method.

[method] is the plate solver for four sided support. The limit depends on the edition.

L, p or AR is outside the chart range, or E1300 gives no laminated glass chart value.Always printed

For two and one sided, monolithic: L or p is outside the chart for this support (L 10 to 144 in, NFL 5 to 209 psf), and no other method covers it. No LR and no pass or fail is reported, so check this case by another method.

For two and one sided, laminated: L or p is outside the laminated glass chart for this support (L 8 to 118 in, NFL 4.2 to 209 psf), and no other method covers it. No LR and no pass or fail is reported, so check this case by another method.

For three sided: AR = a/b is outside the range for three sided support (chart 0.5 to 5, plate solver 0.5 to 10). No LR and no pass or fail is reported, so check this case by another method.

For four sided laminated, E1300 09a or 12a: The laminated glass chart has no value for this case and no other method does, so no LR and no pass or fail is reported. To use Appendix X9, switch to E1300 16 or E1300 24.

For four sided laminated, E1300 16 or 24: The laminated glass chart has no value for this case and no other method does, so no LR and no pass or fail is reported. Check this case by another method.

No other method covers two and one sided support. For laminated glass no other method gives a value either. E1300 16 and E1300 24 offer the Appendix X9 effective thickness method for four sided support.

AR, size and thickness, or p is outside the range of the calculation.Always printed

For AR above 10: AR is above 10, outside the range of the E1300 charts. Verify LR by another method.

For size and thickness: This size and thickness is outside the range of this calculation, so LR is extended beyond it and is less reliable. Verify it by another method.

For design load: p is outside the range of this calculation, so Pb is extended beyond it and is less reliable. Verify it by another method.

You chose a method in place of the default for NFL, w or LS.Always printed

For E1300 value exists: The [quantity] is from the [method], your choice in place of the [default]. It [differs from | equals] the E1300 value, with the deviation in the method panel, so check it against the E1300 document or by another method.

For no E1300 value: The [quantity] is from the [method], your choice in place of the [default]. E1300 has no value for this case, so check it against the E1300 document or by another method.

The method is a user choice; the report names it. The method panel shows the deviation from the E1300 value.

Only one method gives the value.Always printed

For LS, Appendix X3: Only the Appendix X3 equation gives LS, because E1300 Table 5 has no value for this pair of lite thicknesses. Check it against the E1300 document or by another method.

For NFL four sided, plate solver: Only the plate solver gives NFL, because E1300 has no value or appendix equation for this case. Check it against the E1300 document or by another method.

For NFL three sided, plate solver: Only the plate solver gives NFL, because E1300 has no value or appendix equation for this case. It can be less conservative than E1300, so check it against the E1300 document or by another method.

For NFL laminated, Appendix X9: Only the Appendix X9 effective thickness method with the analytical procedure of [E1300 16 6.3.2 | E1300 24 7.3.2] gives NFL, because E1300 has no laminated glass chart value for this case. It can be less conservative than E1300, so check it against the E1300 document or by another method.

Appendix X3 splits the load in proportion to the cube of each lite thickness, as the printed values were. Four sided plate solver: differs from the chart by about 1 percent on average and up to about 3 percent, except for 25 mm glass. Three sided plate solver: linear plate analysis with the Annex A2 failure model, and where the chart prints a value the plate solver gives 1.03 to 2.2 times the chart value. Appendix X9: from about 33 percent less to about 11 percent more than the four sided laminated chart (PVB 0.030 in interlayer, thickness limit on). Verify this result against the E1300 document or by another method.

A thickness override is entered. The second sentence only when t is below the Table 4 minimum or above the nominal designation.Always printed

For within range: Thickness override: t is not the nominal thickness. Check that t is the thickness of the glass you will use.

For outside range: Thickness override: t is not the nominal thickness and is below the Table 4 minimum or above the nominal designation. Check t and the nominal designation.

25 mm glass (chart), or 22 mm glass (two and one sided deflection).Always printed

For 25 mm glass: For 25 mm glass, the E1300 chart gives about 6 percent less load than the Table 4 minimum thickness of 0.969 in, and this result uses [the Table 4 thickness | the chart equivalent thickness of 0.941 in]. Confirm which thickness option for 25 mm glass applies to the project.

For 22 mm glass: For 22 mm glass, the E1300 deflection chart for this support gives about 10 percent more w than beam theory at the Table 4 minimum thickness of 0.844 in, and this result uses the Table 4 thickness. Where deflection governs, verify it by an independent method.

W is reported by a method that is approximate. Appendix X2 replaces X1 under E1300 09a.Always printed

For Appendix X1 or X2: Deflection w is from Appendix [X1 | X2], a curve fit that can differ from the true value by about 10 percent. Where deflection governs, verify it by an independent method.

For Appendix X1 or X2, p below LR/3: Deflection w is from Appendix [X1 | X2], a curve fit that can differ from the true value by about 10 percent and is rough because p is below LR/3. Where deflection governs, verify it by an independent method.

For E1300 chart, four sided: Deflection w is read from the E1300 deflection chart and is approximate. Where deflection governs, verify it by an independent method.

For E1300 chart, three sided: Deflection w at the free edge is read from the E1300 three sided deflection chart and is approximate. Where deflection governs, verify it by an independent method.

For E1300 chart, laminated: Deflection w at the [center of glass | free edge] is read from the E1300 laminated glass deflection chart and is approximate. Where deflection governs, verify it by an independent method.

For beam theory: Deflection w is from linear beam theory at p, the method behind the E1300 chart for this support, and is approximate. Where deflection governs, verify it by an independent method.

For IG: E1300 gives no deflection method for IG, so w of each lite is approximate, from Appendix [X1 | X2] at the share of p that lite carries. Where deflection governs, verify it by an independent method.

Four sided chart: of the nominal thickness, between the printed curves for the two whole AR around this one. Three sided chart: between the printed AR curves, with the curve for 1.5 and above used for every larger AR. Laminated chart: for the designation, between the printed curves for AR 4 and 5 at the center of glass. For IG the load share and the appendix equation are both approximate. Appendix X1 is least reliable at low loads.

No w is reported.Always printed

For very low p: Appendix [X1 | X2] does not apply at this very low p, so no w is reported although w is very small. Where it is required, use a linear plate formula.

For three sided: The design point is outside the E1300 three sided deflection chart for this thickness, and E1300 gives no other deflection method, so no w is reported. Where deflection governs, verify it by an independent method.

Appendix X2 replaces X1 under E1300 09a.

Pb is not reported.

For IG: No Pb is reported for IG, because E1300 gives Pb of IG only in the analytical procedure of [E1300 16 6.3.3 | E1300 24 7.3.3], which GlassLoad.com does not run. Where Pb is required, calculate it by that procedure.

For laminated glass: No Pb is reported for the laminate, because E1300 gives Pb of laminated glass only per ply, in the analytical procedure of [E1300 16 6.3.2 | E1300 24 7.3.2 | E1300 16 6.3.2 and E1300 24 7.3.2]. Where Pb is required, calculate it for each ply by that procedure.

For other supports: No Pb is reported for glass supported on [two opposite edges | one edge | three sides], because E1300 has no procedure for it. Where Pb is required, determine it by another method.

A long duration load and Pb above 8 per 1000 while p is within LR.

For a long duration load, Pb is calculated for a 30 day load with [E1300 16 | E1300 24] Annex A2 and is above 8 per 1000 although p is within LR. The pass or fail result follows Table 1, so confirm that this Pb is acceptable for the project.

Table 1 applies the long duration factor to the load and Annex A2 applies it to the glass stress, so the two differ, most of all when the glass deflects a lot.

Pb is reported under E1300 09a or 12a.Always printed

[Appendix X3 gives only an approximate method for Pb, for a 60 s load, | This edition has no procedure for Pb,] so the value shown uses the failure model of E1300 24 Annex A2. Treat this Pb as approximate.

The failure model is the one behind the E1300 NFL charts.

Pb is reported for HS or FT glass.Always printed

Pb of [HS | FT] glass is approximate, from the plate solver and [E1300 16 | E1300 24] Annex A2 with a residual surface stress of [3500 psi | 10,000 psi] subtracted. Use it for information only, not as a pass criterion.

HS or FT glass with a load duration other than 3 seconds.Always printed

The load duration factors of Appendix [X4 | X6] were derived for AN glass, so LR for HS or FT glass at this load duration is approximate. Where this load duration governs, verify LR by an independent method.

Two sided, one sided or three sided support.

For two and one sided: E1300 treats glass supported on [two opposite edges as a simply supported beam | one edge as a cantilever], so LR does not depend on the width of the lite. Check that the supports do not deflect more than 1/175 of the length of each supported edge.

For three sided: E1300 treats glass supported on three sides with its three sided charts, where a is the length of the two supported edges that meet the free edge, b is the length of the free edge and AR = a/b. Check that the supports do not deflect more than 1/175 of the length of each supported edge.

For three sided support E1300 uses its three sided charts.

A laminate or a laminated lite of an IG unit is checked.

For laminate: Laminated glass of two plies with an interlayer is read as its thickness designation by E1300 [3.2.4.1 | 3.2.4.2][, where a clause exception sets the designation]. Check that this designation matches your laminate.

For laminated lite of IG: A laminated lite of two plies with an interlayer is read as its thickness designation by E1300 [3.2.4.1 | 3.2.4.2][, where a clause exception sets the designation]. Check that this designation matches your laminate.

For laminated lite of IG, long duration load: A laminated lite of two plies with an interlayer is read as its thickness designation by E1300 [3.2.4.1 | 3.2.4.2][, where a clause exception sets the designation]. For a long duration load, E1300 [6.11 to 6.14 | 6.2.10 to 6.2.13 | 7.2.10 to 7.2.13] gives the unit the lowest of four values, so check that the designation matches your laminate.

The E1300 laminated glass charts are read for this designation. For an IG lite, E1300 reads its NFL from the laminated chart of that designation (PVB interlayer, no hotter than 122 F at the design load) and its LS from Table 5. For a long duration load it also checks the short duration LR of every lite and takes LS from Table 6 for a monolithic lite with a laminated lite (Table 5 for two laminated lites).

A laminate is checked.

The E1300 laminated glass charts are for a PVB interlayer, or one shown equivalent by Appendix [X8 | X10], no hotter than 122 F at the design load. Check your interlayer and its service temperature.

Appendix X10 under E1300 09a, X8 under 12a, 16 and 24.

Four sided laminated glass under E1300 09a or 12a.Always printed

This edition has no analytical procedure for laminated glass, so Appendix X9 gives no value. To use it, switch to E1300 16 or E1300 24.

A laminate under a long duration load.

For a long duration load, E1300 uses the 3 second laminated glass chart with the Table 1 long duration factor and makes no reduction for interlayer creep. Where interlayer creep is significant, assess it separately.

W of a laminate is calculated with Appendix X1 or X2 (X2 under E1300 09a).Always printed

For designation thickness chosen: Deflection uses Appendix [X1 | X2] at the thickness t, the Table 4 minimum of the laminate designation, which you chose in place of the Appendix X9 deflection effective thickness. It treats the plies as one lite and can understate w, so where deflection governs, verify it by an independent method.

For Appendix X9 thickness: Deflection uses Appendix [X1 | X2] at the thickness t, the Appendix X9 deflection effective thickness, which depends on G, the load duration and the temperature. Check G, the load duration and the temperature, because w depends on them.

The report states that the designation thickness was chosen.

W of laminated glass comes from Appendix X1 or X2 by a simplified method.Always printed

For E1300 09a, long duration load: Appendix X2 is evaluated for one ply at the share of p that ply carries, so w is approximate. Where deflection governs, verify it by an independent method.

For E1300 09a, short duration load: Appendix X2 is evaluated at the thickness t, the Table 4 minimum of the designation, which treats the plies as one lite, so w can be understated. Where deflection governs, verify it by an independent method.

For E1300 12a, 16 and 24, and laminated lites of IG: Appendix X1 is evaluated at the thickness t, the Table 4 minimum of the designation[ and at the share of p that lite carries], which treats the plies as one lite[ and ignores the interlayer under a long duration load], so w can be understated. Where deflection governs, verify it by an independent method.

E1300 09a X1.1.2 gives the single lite deflection at half of p for a long duration load, which is the share of a ply of equal thickness. E1300 09a X1.1.1 allows Appendix X2 for laminated glass under a short duration load with the laminate thickness designation. E1300 12a gives no thickness for the Appendix X1 deflection of laminated glass (6.6.4 sends a case outside the chart to Appendix X1).

Two and one sided laminated glass.

Beam theory at a maximum stress of 2.4 ksi reproduces the E1300 laminated glass chart for glass supported on [two opposite edges | one edge] within [x] percent, using the effective thickness t_s for LR and t_w for w at the free edge, so w is approximate. Where deflection governs, verify it by an independent method.

The effective thicknesses are those of the printed line of the designation.

An IG unit is checked.

Load sharing uses the load share factors LS, which are approximate, and pressure changes in the air space from temperature and altitude are not included. If the unit is at high altitude or sees large temperature changes, check the air space pressure separately.

LS splits the load in proportion to the cube of each lite thickness. E1300 states that the factors are approximate.

A triple unit is checked.

E1300 recommends a combined air space width of at most 1.00 in for a triple unit. [The air spaces are not given, so this is not checked and you should check the combined width yourself. | The sum of the air spaces entered is within this limit, so no further check of the width is needed. | The sum of the air spaces entered is above this limit, so reduce the combined width or check the sealant and glass stresses from temperature and altitude changes.]

A larger width can cause high sealant and glass stresses from temperature and altitude changes. E1300 09a and 12a Note 4, 24 Note 7.

Sloped glass.Always printed

The normal part wn of the glass weight TGW is added to the load on the glass. The part wt along the glass is not checked, so check the setting blocks, supports and fixings separately.

The normal part is the weight times the sine of the angle. E1300 includes self weight in the design load but does not say how to resolve it on sloped glass.

A snow load on sloped glass.Always printed

The snow load S is given per horizontal projected area, so the load normal to the glass is S times f. Check that your S is given per horizontal projected area.

f is the square of the sine of the angle from vertical, to 3 decimals. E1300 does not give this conversion.

Loads of different durations act together.

Loads acting together are checked at each load duration present, each with every load of that duration or longer. Snow and glass weight are taken as 30 day loads, so check that this suits your load combination.

E1300 checks a load at one duration and does not say which duration a combination has. As in E1300 Example 3, the glass weight is added to p.

HS or FT glass under loads of different durations.Always printed

For E1300 09a, 12a, 16: E1300 [09a Appendix X7 | 12a Appendix X5 | 16 Appendix X5] gives its load duration exponent for AN glass only, so loads of different duration are not combined for [HS | FT] glass. Check the load combination by another method.

For E1300 24: E1300 24 Appendix X5 uses one load duration exponent for all glass types, so [HS | FT] glass is allowed only [65 | 57] percent of the 30 day load that Table 1 allows. Check the load combination by another method if you rely on the residual surface compression.

E1300 24 does not credit the residual surface compression.

An outward load on sloped glass.Always printed

The outward load is checked [without relief from the glass weight | with the full glass weight normal to the glass as relief | with 0.6 times the glass weight normal to the glass as relief]. E1300 gives no such relief, so confirm that this setting is appropriate for the project.

The 0.6 factor is from the ASCE 7 uplift load combinations.

A double glazed unit on a slope under E1300 09a or 12a.Always printed

The glass weight of the unit is added as the share wn times LSF carried by the governing lite, as in E1300 [09a | 12a] Example 3. Check that this share suits your unit.

LSF is the load share fraction of the lite with the lowest load resistance for the duration of the case. The other loads of the case are added in full.

Pu is above 10.0 kPa.Always printed

Pu is above 10.0 kPa, outside the simplified method of AS 1288 Section 4. Check this case by another method.

Ps is above 10.0 kPa.Always printed

Ps is above 10.0 kPa, outside the simplified method of AS 1288 Section 4. Check this case by another method.

Pu is below 0.6 kPa.Always printed

Pu is below 0.6 kPa, the lowest pressure on the AS 1288 charts, and the chart formula is used as printed. Where this result governs, verify it by an independent method.

A is above 0.85 m² for 3 mm AN glass.Always printed

A is above 0.85 m², the maximum area of 3 mm AN glass (AS 1288 3.6.3). Choose thicker glass or a smaller area.

A is above 1.36 m² for 3 mm AN glass in an IG unit.Always printed

A is above 1.36 m², the maximum area of 3 mm AN glass in an IG unit (AS 1288 3.6.3). Choose thicker glass or a smaller area.

Three edge support.Always printed

Three edge support is checked as two edge support spanning the free edge (AS 1288 4.4.4). Check that this simplification suits your glazing.

Laminated glass with unequal plies or an interlayer other than PVB.Always printed

Laminated glass with unequal plies or an interlayer other than PVB is outside AS 1288 Section 4, so there is no chart result. Check this case by another method.

An IG unit is checked.

Each lite of an IG unit carries 1.25 t³ / Σt³ of the pressure (AS 1288 3.4.2), and no cavity pressure is included. If the unit is at high altitude or sees large temperature changes, check the cavity pressure separately.

Support other than four edge.Always printed

EN 16612 has coefficients only for four edge support, so for this support GlassLoad.com uses [beam theory | the plate solver]. Where this result governs, verify it by an independent method.

One edge support.Always printed

EN 16612 9.1.4 gives no deflection span for one edge support, so the cantilever length L is used. Confirm that this span is appropriate for the project.

Laminated glass.Always printed

Laminated glass uses the simplified method of EN 16612 Annex D, which can underestimate stress for small sizes. Verify small sizes by another method.

An IG unit is checked.Always printed

Cavity temperature from sunlight is not modelled, and only the altitude and temperature differences you enter are included. If sunlight heats the unit, check the cavity pressure separately.

Pnet is above 10 kPa.Always printed

Pnet is above 10 kPa, the upper limit of the empirical method of IS 16231 (Part 3) 5.3 a. Check this case by another method.

GlassLoad.com refuses this case and gives no result. The standard is unclear or does not cover it, which does not mean the glass is unsafe.

Pnet is above 5.0 kPa.Always printed

Pnet is above 5.0 kPa, the highest pressure printed in Tables 6 to 14 of IS 16231 (Part 3), and the tabulated relation is continued as printed. Where this result governs, verify it by an independent method.

Pnet is below 0.5 kPa.Always printed

Pnet is below 0.5 kPa, the lowest pressure printed in Tables 6 to 14 of IS 16231 (Part 3), and the tabulated relation is continued as printed. Where this result governs, verify it by an independent method.

A is above 15 m².Always printed

A is above 15 m², the maximum area of a glass panel in IS 16231 (Part 3) 5.2 a. Choose a smaller area or design this panel by another method.

GlassLoad.com refuses this case and gives no result. The standard is unclear or does not cover it, which does not mean the glass is unsafe.

The longer side is above 4 m.Always printed

The longer side a is above 4 m, the maximum span of a window in IS 16231 (Part 3) 5.2 b. Choose a smaller span or design this panel by another method.

GlassLoad.com refuses this case and gives no result. The standard is unclear or does not cover it, which does not mean the glass is unsafe.

AR is above ARmax for the thickness on four edges.Always printed

AR is above ARmax for this thickness in Table 3 of IS 16231 (Part 3), so the empirical relation is not valid. Reduce AR or check this case by another method.

GlassLoad.com refuses this case and gives no result. The standard is unclear or does not cover it, which does not mean the glass is unsafe.

AR is below 1.5 on four edges.Always printed

AR is below 1.5, so IS 16231 (Part 3) 5.2 c asks for the next thicker glass than the table result. Check that T is at least one standard thickness above the thinnest thickness that passes.

A is above 0.85 m² for 3 mm monolithic annealed glass.Always printed

A is above 0.85 m², the maximum area of 3 mm monolithic annealed glass (IS 16231 (Part 3) 7.1.1). Choose thicker glass or a smaller area.

Laminated glass with unequal sheets, an interlayer other than PVB or a PVB thickness other than 0.38 mm.Always printed

Laminated glass with unequal sheets, an interlayer other than PVB or a PVB thickness other than 0.38 mm is outside the tables of IS 16231 (Part 3), so there is no table result. Check this case by another method.

GlassLoad.com refuses this case and gives no result. The standard is unclear or does not cover it, which does not mean the glass is unsafe.

Laminated glass is checked.

Laminated glass is checked with the strength factor Pf and the constants of Tables 7 and 12, and the shear stiffness of the interlayer is not modelled. Where this result governs, verify it by an independent method.

An IG unit is checked.

Only the thinner pane of an IG unit is checked, with the strength factor Pf of IS 16231 (Part 3) 5.4, and no load sharing or cavity pressure is included. If the unit is at high altitude or sees large temperature changes, check the cavity pressure separately.

Three edge support.Always printed

Three edge support is checked as two edge support spanning the unsupported edge (IS 16231 (Part 3) 7.4). Check that this simplification suits the glazing.

Every check, because the deflection is always shown.

Deflection is calculated with the Annex C formula at Ps, because IS 16231 (Part 3) gives no separate serviceability pressure. Check the serviceability load that the project requires.

Heat strengthened laminated or toughened laminated glass.Always printed

Heat strengthened laminated and toughened laminated glass need the factor of IS 16231 (Part 3) 7.5, which the standard does not fully define. Check this case by another method.

GlassLoad.com refuses this case and gives no result. The standard is unclear or does not cover it, which does not mean the glass is unsafe.

The thickness has no column in Tables 6 to 14.Always printed

T has no column in Tables 6 to 14 of IS 16231 (Part 3), so there is no table result. Choose a thickness that has a column or check this case by another method.

GlassLoad.com refuses this case and gives no result. The standard is unclear or does not cover it, which does not mean the glass is unsafe.

Every check.Always printed

IS 16231 (Part 3) does not say which governs when the tables of 5.9 and the relation of 5.3 disagree, and GlassLoad.com assumed the tables, which allow less. Check which of the two the project authority accepts.

Every check.Always printed

IS 16231 (Part 3) 5.4 does not say whether Pnet carries a load factor, and GlassLoad.com applied none to the Pnet entered, as Annex D does. Check that the Pnet entered is the ultimate limit state net design wind pressure of 5.4, determined to IS 875 (Part 3).

T is 6 mm.

IS 16231 (Part 3) 5.3 prints less than 6 mm and more than 6 mm and leaves 6 mm open, and GlassLoad.com used the branch up to 6 mm, as 5.3.1 and Annex D print. Check the relation value in the method panel only as a comparison.

Heat strengthened glass on two or three edges.Always printed

Table 14 of IS 16231 (Part 3) gives heat strengthened spans below the annealed spans of Table 11 for the same thickness and pressure, so the standard is unclear for heat strengthened glass on two or three edges and GlassLoad.com gives no result. Check this case by another method.

GlassLoad.com refuses this case and gives no result. The standard is unclear or does not cover it, which does not mean the glass is unsafe.

Laminated glass is checked.Always printed

The columns of Tables 7 and 12 of IS 16231 (Part 3) do not follow 5.4.1 for most thicknesses, and the standard gives no shear modulus for Annex B, so GlassLoad.com used the printed constants and the aspect ratio row under Table 7 as printed and did not apply Annex B. Check laminated glass by another method where it governs.

Two or three edge support.Always printed

Clause 7.3 of IS 16231 (Part 3) names Tables 9 to 12 for two edge support, but the spans are in Tables 11 to 14, so GlassLoad.com used Table 11 for annealed, Table 12 for laminated and Table 13 for toughened glass. Check these table numbers against the printed standard.

Every check, because the plate solver row of the method panel is always shown.

IS 16231 (Part 3) 5.3 c and Table 15 give different design strengths, and GlassLoad.com used Table 15 for the plate solver row of the method panel. Use that row as a comparison only.

Every check, because the deflection is always shown.Always printed

IS 16231 (Part 3) Annex D prints a deflection that the Annex C formula does not give, compares it with the mullion limit of 7.6.2 a, and names one thickness for Annex C, so GlassLoad.com used the Annex C formula as printed, the limit of 7.6.2 c, the sum of the sheets for laminated glass and the thinner pane for insulating glass. Check the deflection against the limit that the project requires.

Support other than four edges, or AR above 5.Always printed

Annex C of IS 16231 (Part 3) gives the deflection of a four edge panel and prints no range of aspect ratio, so GlassLoad.com used beam theory for two and three edge support and the polynomials at an aspect ratio of 5 for larger ratios. Check the deflection by another method where it governs.

An IG unit with a laminated pane.Always printed

IS 16231 (Part 3) 5.4 does not mention laminated panes in an insulating unit, so the standard is unclear there and GlassLoad.com gives no result. Check this case by another method.

GlassLoad.com refuses this case and gives no result. The standard is unclear or does not cover it, which does not mean the glass is unsafe.