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// CODE SNIPPET

1101.12.1 Primary Roof Drainage

California Plumbing Code 2016 > 11 Storm Drainage > 1101.0 General > 1101.12 Roof Drainage > 1101.12.1 Primary Roof Drainage
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Roof areas of a building shall be drained by roof drains or gutters. The location and sizing of drains and gutters shall be coordinated with the structural design and pitch of the roof. Unless otherwise required by the Authority Having Jurisdiction, roof drains, gutters, vertical conductors or leaders, and horizontal storm drains for primary drainage shall be sized based on a storm of 60 minutes duration and 100 year return period. Refer to Table D 101.1 (in Appendix D) for 100 year, 60 minute storms at various locations.

Related Code Sections


1101.12.1 Storm Drainage, Primary Roof Drainage
or leaders, and horizontal storm drains for primary drainage shall be sized based on a storm of 60 minutes duration and 100 year return period. Refer ...
California Plumbing Code 2016 > 11 Storm Drainage > 1101.0 General > 1101.12 Roof Drainage > 1101.12.1 Primary Roof Drainage
1101.12.1 Storm Drainage, Primary Roof Drainage
or leaders, and horizontal storm drains for primary drainage shall be sized based on a storm of 60 minutes duration and 100 year return period. Refer ...
California Plumbing Code 2019 > 11 Storm Drainage > 1101.0 General > 1101.12 Roof Drainage > 1101.12.1 Primary Roof Drainage
1101.12 Storm Drainage, Roof Drainage
drainage system shall be a separate system of piping, independent of the primary roof drainage system. The discharge shall be above grade, in a location ...
California Plumbing Code 2019 > 11 Storm Drainage > 1101.0 General > 1101.12 Roof Drainage
1101.12.2.2.2 Storm Drainage, Combined System
The secondary roof drains shall connect to the vertical piping of the primary storm drainage conductor downstream of the last horizontal offset ...
California Plumbing Code 2016 > 11 Storm Drainage > 1101.0 General > 1101.12 Roof Drainage > 1101.12.2 Secondary Drainage > 1101.12.2.2 Secondary Roof Drain > 1101.12.2.2.2 Combined System
1101.12.2.2.2 Storm Drainage, Combined System
The secondary roof drains shall connect to the vertical piping of the primary storm drainage conductor downstream of the last horizontal offset ...
California Plumbing Code 2019 > 11 Storm Drainage > 1101.0 General > 1101.12 Roof Drainage > 1101.12.2 Secondary Drainage > 1101.12.2.2 Secondary Roof Drain > 1101.12.2.2.2 Combined System
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