Minimum Height Of Roof Drain Terminal

If water proof deck covering thickness is greater or less than 3 16 lip dimension must be specified.

Minimum height of roof drain terminal.

Flange will have a minimum 4 width with a 3 16 lip at drain body. Design and installation of roof drainage systems shall comply with section 1503 of this code and sections 1106 and 1108 as applicable of the international plumbing code. The waterproof membrane extends 150mm height in the door reveal and roof abutment wall. Watts drainage products rd 300 r series 4 in.

In sizebefore penetrating a wall or roof and d where the buildingis 4 storeys or less in height the vent pipe terminates above the roof of the building. Roughing dimensions of the body must be adjusted. The modern roof drain is designed to drain off rainwater in the most effec. Overflow drains shall be the same size as the roof drains with the inlet flow line two inches above the low point of the roof and shall be installed independent from the roof drains.

Any increase in the size of the vent shall be made inside the structure a minimum of 1 foot 305 mm below the roof or inside the wall. We describe online roof drainage requirements calculators pertinent plumbing standards a table approach to looking up roof drainage. P 1503 4 1 secondary emergency overflow drains or scuppers. A good rule to follow is to provide two roof drains for a total roof area less than 10 000 square feet.

C the vent pipe is increased to not less than 3 in. A horizontal gap of minimum 10mm between frame front edge and drainage. Once the drainage system is determined the designer must ensure positive drainage by correctly positioning the roof drains. 4 except for a fresh air inlet where a vent pipe is terminated in open air the terminal shall be located.

An additional roof drain should be added for each 10 000 square foot area. This article describes several methods for determining the drainage capacity required to safely drain water off of building roofs whether from rainfall melting snow or a combination of those water sources. Roof drainage requirements specifications. Cast iron roof drain with 2 in.

By the 1997 edition of the upc section 1101 11 2 had been added that completely prescribed where and how secondary roof drainage was to be provided.