What size scupper do I need?

What size scupper do I need?

Roof Scupper Size The only unconditional guideline for roof 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.”

How do you measure a scupper?

Parapet scupper sleeves rarely have their rings replaced….When measuring a scupper drain ring to find a replacement, there are three critical dimensions to measure:

1. Left outside edge to right outside edge.
2. Out from the parapet wall to the outside edge.
3. Up from the roof deck to the upper outside edge.

How far apart should scuppers be?

Scuppers should be spaced no greater than 10 feet apart depending on the roof area drained.

What is a thru wall scupper?

Designed for existing through-wall/side-wall or scupper drainage pipes, the aluminum and stainless steel drain components provide durability and compatibility with single ply, BUR and modified bitumen roofing systems.

What size are scupper plugs?

Compatibility And Dimension: These scupper plugs have a diameter of 4.4 cm (1.25 in.) and are 2.54 cm wide (1.16 in.).

How do you measure a roof scupper?

To adjust this table for other than a 5-inch design rain fall rate, multiply the square footage on the table by 5 then divide by the local design rain fall rate. Example: For 4 inches of design rainfall rate, a 4-inch long scupper with a 1-inch head would accommodate 287 square feet. (230 x 5) ÷4 = 287.

How do you calculate roof drains?

Take the roof’s total square footage and divide by the total square footage handled by one drain. The result is the number of drains needed. For example: 50,000 / 4,400 = 11.36; or 12 drains required.

Are scupper plugs universal?

Some scupper plugs you find for sale are “universal” or “one-size-fits-all”. The self-bailing plugs allow excess water to drain while still plugging the scupper hole while the pull rope design allows for easy removal.

Are all scupper plugs the same?

There are different types of scupper plugs. The universal scupper plugs fit most sit-on-top kayaks and are easy to find. These plugs are made of plastics and have strings that make them easier to detach from the scupper hole. Some plugs have a screw-in design that ensures a water-tight fit.

How many square feet can a 4 roof drain handle?

4,600 sq. ft.
Example: For a 4″ hourly rainfall and 4″ leader, each drain can handle 4,600 sq. ft. of roof area.

What is the minimum number of roof drains for any size building?

1110.4Minimum number of roof drains. Not less than two roof drains shall be installed in roof areas 10,000 square feet (929 m2) or less and not less than four roof drains shall be installed in roofs over 10,000 square feet (929 m2) in area.