Roof Drainage System Design

From the very dawn of building construction it has been necessary to incorporate some method of gathering and discharging rainwater from the roof of a structure.

Roof drainage system design.

Hence this is by far the most common roof drainage situation. Design considerations to keep in mind. Functioning drainage system for steep slope roofs is to maintain a minimum roof slope. 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.

A typical commercial or multifamily residential building will utilize one of the following types of primary roof drainage. There are various approaches that can accomplish this balancing act but each offers its own advantages disadvantages depending on a number of factors. Typically a steep slope roof slope is equal to or greater than 3 inches of rise per 12 inches of run 25. Roof drainage is one of the fundamental considerations of building 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.