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SIZING DATA (For Conventional Drainage) Zurn makes it easy to size roof drains. The four things you will need to know are: 1) rate of precipitation; 2) total area of roof; 3) size of leader required; and 4) area handled by each drain.
Zurn makes it easy to size roof drains. The four things you will need to know are: 1) rate of precipitation; 2) total area of roof; 3) size of leader required; and 4) area handled by each drain. When sizing roof drains, the limiting factor for the amount of water each drain will carry away is the size of leader.Therefore, increasing
1. Calculate the total roof area. Accurately measuring your roof area is essential for precise calculations. Use a tape measure to determine the length and width of your roof, then multiply the two measurements to find the total square footage. 2. Determine the leader size.
Roof Drain Sizing Chart. Zurn Plumbing Products Group (not a sponsor) makes it easy to size roof drains. The four things you will need to know are: area handled by each drain. When sizing roof drains, the limiting factor for the amount of water each drain will carry away is the size of the leader. Therefore, increasing.
Select a reference of a roof drain size with hourly rainfall together with the roof area square footage you have estimated and then determine from the chart below how many roof drains you require. Example: Each 4" drain size in a 6" hourly rainfall area will accommodate drainage of 3,070 sq. ft. of roof area.
IPC provides four steps to size the roof drains on a building: Determine 100-year, 1-hour rainfall rate used for location of building. Select number of roof drains and calculate the roof area sloped to each drain. Size horizontal storm drainage piping.
Two of Zurn’s most popular roof drains are the Z100-C-EA-R and the Z100-DP-EA pictured below. These illustrate the basic components and several popular options: the adjustable extension (-EA), the roof sump receiver (-R), the underdeck clamp (-C), and the roof deck plate (-DP).
A Roof Drains Calculator is a specialized tool used by architects, engineers, and builders to determine the number and size of drains required on a roof to effectively remove rainwater or melted snow. The goal is to prevent water buildup and protect the integrity of the structure.
SYSTEM SIZING DATA. Rainfall, when expressed in G.P.M. can be applied to the table in Figure 8 to determine the sizes of the various components of the conventional roof drainage system, including roof drains, vertical leaders and horizontal drainage piping.
Sizing. Calculate roof area (sq. ft.) to be drained. Determine average hourly rainfall rate at roof location (Chart A). Approximate leader (drain pipe) size. In general, increasing leader size will decrease the number of drains required. Reference leader size with hourly rainfall rate, to determine roof area drained by each leader (Chart B).