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// CODE SNIPPET

R613.8 Mullions Occurring Between Individual Window and Glass Door Assemblies

2010 Residential Code of NY > 6 Wall Construction > R613 Exterior Windows and Glass Doors > R613.8 Mullions Occurring Between Individual Window and Glass Door Assemblies
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R613.8.1 Mullions

Mullions shall be tested by an approved testing laboratory in accordance with AAMA 450, or be engineered in accordance with accepted engineering practice. Mullions tested as stand-alone units or qualified by engineering shall use performance criteria cited in Sections R613.8.2, R613.8.3 and R613.8.4. Mullions qualified by an actual test of an entire assembly shall comply with Sections R613.8.2 and R613.8.4.

R613.8.2 Load Transfer

Mullions shall be designed to transfer the design pressure loads applied by the window and door assemblies to the rough opening substrate.

R613.8.3 Deflection

Mullions shall be capable of resisting the design pressure loads applied by the window and door assemblies to be supported without deflecting more than L/175, where L is the span of the mullion in inches.

R613.8.4 Structural Safety Factor

Mullions shall be capable of resisting a load of 1.5 times the design pressure loads applied by the window and door assemblies to be supported without exceeding the appropriate material stress levels. If tested by an approved laboratory, the 1.5 times the design pressure load shall be sustained for 10 seconds, and the permanent deformation shall not exceed 0.4 percent of the mullion span after the 1.5 times design pressure load is removed.

Related Code Sections


R613.8 Wall Construction, Mullions Occurring Between Individual Window and Glass Door Assemblies
Mullions shall be capable of resisting the design pressure loads applied by the window and door assemblies to be supported without deflecting more than ...
2010 Residential Code of NY > 6 Wall Construction > R613 Exterior Windows and Glass Doors > R613.8 Mullions Occurring Between Individual Window and Glass Door Assemblies
R609.8 Wall Construction, Mullions
Mullions shall be capable of resisting the design pressure loads applied by the window and door assemblies to be supported without deflecting more ...
2020 Residential Code of New York State > 6 Wall Construction > R609 Exterior Windows and Doors > R609.8 Mullions
R609.8 Wall Construction, Mullions
Mullions shall be capable of resisting the design pressure loads applied by the window and door assemblies to be supported without deflecting more ...
Residential Code 2015 of New York State > 6 Wall Construction > R609 Exterior Windows and Doors > R609.8 Mullions
Section R609 Wall Construction, Exterior Windows and Doors
Window and glass door assemblies shall be anchored in accordance with the published manufacturer's recommendations to achieve the design pressure ...
Residential Code 2015 of New York State > 6 Wall Construction > R609 Exterior Windows and Doors
715.5.6 Fire-Resistance-Rated Construction, Window Mullions
Metal mullions that exceed a nominal height of 12 feet (3658 mm) shall be protected with materials to afford the same fire-resistance rating ...
2010 Building Code of NY > 7 Fire-Resistance-Rated Construction > 715 Opening Protectives > 715.5 Fire-Protection-Rated Glazing > 715.5.6 Window Mullions
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