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1502.3 Scuppers
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Where scuppers are used for secondary (emergency overflow) roof drainage, the quantity, size, location and inlet elevation of the scuppers shall be sized to prevent the depth of ponding water from exceeding that for which the roof was designed as determined by Section 1611.1. Scuppers shall not have an opening dimension of less than 4 inches (102 mm). The flow through the primary system shall not be considered when locating and sizing scuppers.
Related Code Sections
1502.3 Roof Assemblies and Rooftop Structures, Scuppers
Where scuppers are used for secondary (emergency overflow) roof drainage, the quantity, size, location and inlet elevation of the scuppers shall ...
Building Code 2021 of Illinois > 15 Roof Assemblies and Rooftop Structures > 1502 Roof Drainage > 1502.3 Scuppers
1502.3 Roof Assemblies and Rooftop Structures, Scuppers
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Building Code 2018 of Illinois > 15 Roof Assemblies and Rooftop Structures > 1502 Roof Drainage > 1502.3 Scuppers
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Recovering or replacing an existing roof covering shall not be required to meet the requirement for secondary (emergency overflow) drains or scuppers ...
Building Code 2018 of Illinois > 15 Roof Assemblies and Rooftop Structures > 1511 Reroofing > 1511.1 General
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Building Code 2021 of Illinois > 15 Roof Assemblies and Rooftop Structures > 1512 Reroofing > 1512.1 General
705.1 Alterations—Level 1, General
the requirement for secondary (emergency overflow) drains or scuppers in Section 1502 of the International Building Code for roofs that provide for positive ...