Roof Drainage System Design

The design event used for sizing a roof drainage system will therefore not normally come out of a clear blue sky and then end equally suddenly but will have been preceded by a period of less intense rainfall.

Roof drainage system design.

A typical commercial or multifamily residential building will utilize one of the following types of primary roof drainage. Typically a steep slope roof slope is equal to or greater than 3 inches of rise per 12 inches of run 25. For most dwellings you ll find that gutters range in size from approximately 100mm diameter to 150mm diameter assuming gutters with a half round section profile and downpipes range from approximately 60mm diameter to 90mm diameter assuming circular downpipes. A roof drain system s primary function is efficient water removal but in most cases it must also offer aesthetic appeal and on deck workspace.

Establishing a minimum slope is critical because most steep slope roofing as. Functioning drainage system for steep slope roofs is to maintain a minimum roof slope. Design considerations to keep in mind. There are various approaches that can accomplish this balancing act but each offers its own advantages disadvantages depending on a number of factors.

It is important for architects plumbing engineers and civil engineers to work together to design a system that will properly drain rainwater from a building and site.