Floor Drain Calculation

Recommended grate free areas for various outlet pipe sizes 1 1 2 2 04 3 06 4 08 2 3 14 4 71 6 28 3 7 06.

Floor drain calculation.

Most floor drain bodies are available with a flange for either anchoring the drain in the floor slab or for use as a flashing flange in upper floors and waterproofed areas. 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. This table is based on zurn s roof drain vertical requirement for horizontal roof areas at various rainfall rates table. A particular pipe size on a given grade will only carry a certain amount of water.

Checks the capacity of drain tile on existing drainage systems. Sufficient or if exterior surface flow calculations are required. The sizing of roof drains must be large enough to quickly carry away all. Take the roof s total square footage and divide by the total square footage handled by one drain.

The prinsco drainage calculator estimates the capacity of tile drainage systems. Calculate drains needed. From your backyard patio to the neighborhood aquatic center from the factory floor to a professional sports facility nds offers superior quality drainage solutions for every environment. Q flow rate gallons per minute cd discharge coefficient 0 6 assumed a open area of grate square inches g acceleration 32 ft sec sec h head above floor inches.

Below illustration is a typical application using the calculator. Factors which affect proper roof drainage are deck slope drain size and placement of drains. The steeper the grade of the installed pipe the more water it will carry. Drain open area flow rate calculations assumed values units used in spreadsheet calculation.