Flat Roof Scupper Size

Factors which affect proper roof drainage are deck slope drain size and placement of drains.

Flat roof scupper size.

This wizard makes it easy to calculate the roof design area by providing various shape calculations and the calculation for vertical walls area per international plumbing code ipc. Determine 100 year 1 hour rainfall rate used for location of building. Scuppers are used to provide an outlet through parapet walls or gravel stops on flat and built up roofs to allow drainage of excess water. 1 in 25 4 mm 1 ft 305 mm 1 ft2 0 0929 m2 100 0 figure a101 1 example roof plan 4 a 101 2 solution.

Scuppers are rectangular openings in parapet walls that are a minimum of 4 inches in width and height ranging from 4 to 6 inches. Select number of roof drains and calculate the roof area sloped to each drain. For the purposes of this appendix the following metric conversions are applicable. The full flow capacity of a drain is not realized until the water reaches approximately 2 5 above the inlet in a four inch drain and 3 5 in a six inch drain.

Size vertical storm drainage piping. Determine leader or pipe size. They can be used in conjunction with gutters and downspouts to divert the flow to the desired location. The gutter and downspout size requirement depends upon the number of sections and length of the gutter sections as well as the number of downspouts.

Roof area is 200 x 500 100 000 sq. If the scuppers are used as primary drainage then they are applied flush with the roof level. Scuppers can be installed to carry water into gutters or directly into downspouts through conductor heads. Roof drain system and size the scuppers denoting the required head of water above the scupper for the structural engineer.

Calculate total roof area. 4 roof drain 3 determine your building s location on the above map to determine the approximate rainfall as measured in inches per hour. Scuppers shall not have an opening dimension of less than 4 inches. There are 5 easy steps to figure out how many drains your commercial roofing project will need.

2 estimate the roof drain outlet size you will likely use. The only unconditional guideline for scupper sizing provided by the code is that scupper openings shall be not less than 4 inches 102 mm in height and have a width that is equal to or greater than the circumference of a roof drain sized for the same roof area so we can at least be certain that round scuppers can t have a diameter of. Calculate the total roof area by multiplying its length by width. Ipc provides four steps to size the roof drains on a building.

Size horizontal storm drainage piping.