Roof Leader Design

Determine peak runoff from each roof for the design storm selected.

Roof leader design.

Size gutter based on type peak flow and slope. Design load the water depth or build up would be limited to 3 in. The above result is the number of roof drains required for the building. See figures 1 2 and 3.

This keeps the load down to approximately 25 lbs. During design an engineer or architect should lay out a roof drain system consistent with the structural design of the roof. Total roof area. If the result is a fraction less use the next higher number.

Leader design studio is a sarasota florida based architecture firm well known for its warm modern sustainable designs. Leader design studio is a full service architecture firm. Divide the total roof area by the area that one leader will handle. Section 101 5 of the ipc tells us not to reduce the pipe size in the direction of flow.

Flat roof normally for a flat roof with a 30 lbs. Each leader must be large enough to handle the volume of water to be drained the greater the leader capacity the fewer roof drains are needed. To size the vertical roof drain for the same parameters 5 000 square feet of room area and 6 per hour of rain consult table 1106 2 figure 3. In general roof drains are spaced equally and are located in low points of the roof or in any areas where water accumulates.

Please note always use a safety harness barrier. This reveals that the minimum size for the leader pipe is 5. But this isn t the whole story. Innovative woodworker jeremy broun undertakes repairs to his roof keeping costs down high up.

Select type of gutter to be used. Square feet that can be drained by one roof leader at the local maximum rainfall rate.