Gutter And Downspout Sizing

Please lower the maximum spacing between downspouts to see this effect.

Gutter and downspout sizing.

Types of gutter downspouts. The gutter and downspout size required is highly dependent on the amount of gutter and the spacing of the downspouts. As with gutters a downspout s capacity must match or exceed the expected runoff. Rectangular 2 by 3 inches 600 square feet 3 by 4 inches 1 200 square feet.

Downspouts and gutters are sized in relation to rainfall on this basis. Area for drainage design and they often use a square foot. By reducing the downspout spacing to perhaps 35lf you could use a 6 gutter with 9 4 x6 downspouts in lieu of an 8 system. For example a 6 inch k style gutter requires a 3 x 4 downspout while a 5 inch k style gutter uses a 2 x 3 downspout.

Use the chart below to figure out how many extra downspouts you need. 2 by 3 inches 600 square feet. Adding a 2 by 3 rectangular downspout for instance boosts your gutter s capacity by 600 square feet of drainage area. There is a range of downspout styles which are available in the market as listed below.

Plumbing codes typically use the vertically projected roof. Allowance per square inch of downspout for 1 in hr 25. Contact an saf commercial gutter pro now. Mm hr rainfall that varies with diameter for example 3.

Plumbing codes typically use the vertically projected roof area for drainage design and they often use a square foot allowance per square inch of downspout for 1 in hr 25 mm hr rainfall that varies with diameter for example 3. Adding additional downspouts will require less gutter and downspout volume resulting in smaller gutters downspouts. It is easy to see that you can vary gutter size downspout size and downspout spacing to properly size a gutter downspout system. 3 by 4 inches 1 200 square feet.

Gutter professionals have experience matching the gutters and the downspouts. Adding a 2 by 3 rectangular downspout for instance boosts your gutter s capacity by 600 square feet of drainage area. As with gutters a downspout s capacity must match or exceed the expected runoff. Use the chart below to figure out how many extra downspouts you need.

The sizes available in this style are 3 4 5 and 6.