Drainage Gutter Design

Design principles for roof drainage systems the building type its appearance and location have a direct influence on the design of the roof drainage system.

Drainage gutter design.

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. The map needs to be as close to scale as possible. To the design of the roof drainage system. Cross off any edge that isn t at the bottom of a slope.

Before installing gutters rainwater from the roof fell to the ground and didn t flow anywhere before soaking in to the soil hence large spring rains lead to water in the basement. I wanted a good way to get rainwater from the roof as far away from the house as possible. They also influence the use of gutters and downspouts roof drains and scuppers. They determine the roof area slope and rainfall intensity.

The rain intensity according to table 1 2 rainfall data and drainage factors uses a 5 minute duration for a 10 year or 100 year storm thereby providing a worst case scenario for the downspout and gutter design. You can use your. How to design a gutter downspout system step 1. Roof area to be considered the design capacity for a roof drainage system depends on the quantity of water to be handled.

For multi lane roadways with curb and gutter flow spread width must never exceed the lane width adjacent to the gutter for design conditions. For single lane roadways with curb and gutter flow spread width must leave at least one 8 ft lane free of water in each direction for design conditions. Downpipe eaves gutter long straight eaves gutters box gutter to rain water head box gutter vertical faces box gutter side o flow box gutter vertical o flow storm water pipe size storm water network overland flow path spitter upstream end custom rain water head. Factors to be considered in the design of roof drainage sys tems are the area to be drained size of gutters downspouts outlets slope of roof type of building and appearance.

Use this downspout extension to divert water away from the foundation or connect to drainage pipe and catch basin to control drainage. The flexible design easily bends and holds its shape and can be extended from 25 in. Install a french drain one of the top yard drainage solutions to divert water away from problem areas. Learn more how to storm water design for building sites.

Draw a map of your roof on a piece of paper.