Secondary Dischareg Roof Drain

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Secondary dischareg roof drain.

A standpipe or dam built within the secondary drain dictates the anticipated water depth. When a secondary roof drainage system is installed it shall discharge independent of the primary building storm system and shall terminate a minimum of 18 above grade in an area that will be visible to the people who occupy the building. Secondary drainage secondary or emergency roof drainage is required wherever the buildup of water is detrimental to the roof structure. The secondary roof drainage system can be of two methods roof scuppers open sides of parapet walls or secondary roof drains.

Roof drainage is one of the fundamental considerations of building design. The secondary roof drains can be of two types roof drains with an independent piping system or roof drains that combine with the primary roof drainage piping which will require an increase in piping size. When 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. Discharge shall be above grade in a location that would normally be observed by the building occupants or maintenance personnel.

This system shall be compliant with all federal state and local codes. Discharge shall be above grade in a location that would normally be observed by the building occupants or maintenance personnel. Scuppers shall not have an opening dimension of less than 4 inches. Secondary drainage shall be provided through the use of sidewall scuppers or internal roof drains.

From the very dawn of building construction it has been necessary to incorporate some method of gathering and discharging rainwater from the roof of a structure. In either case the discharge shall be located so that it is readily visible by building occupants. Secondary roof drain systems shall have the end point of discharge separate from the primary system. Secondary roof drain systems shall have the end point of discharge separate from the primary system.