Gutter And Downspout Sizing

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.

Gutter and downspout sizing.

Adding additional downspouts will require less gutter and downspout volume resulting in smaller gutters downspouts. Mm hr rainfall that varies with diameter for example 3. 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. Adding a 2 by 3 rectangular downspout for instance boosts your gutter s capacity by 600 square feet of drainage area.

Please lower the maximum spacing between downspouts to see this effect. The gutter and downspout size required is highly dependent on the amount of gutter and the spacing of the downspouts. Contact an saf commercial gutter pro now. Use the chart below to figure out how many extra downspouts you need.

As with gutters a downspout s capacity must match or exceed the expected runoff. 3 by 4 inches 1 200 square feet. Are sized in relation to rainfall on this basis. Allowance per square inch of downspout for 1 in hr 25.

It is easy to see that you can vary gutter size downspout size and downspout spacing to properly size a gutter downspout system. Rectangular 2 by 3 inches 600 square feet 3 by 4 inches 1 200 square feet. Area for drainage design and they often use a square foot. The sizes available in this style are 3 4 5 and 6.

Use the chart below to figure out how many extra downspouts you need. Types of gutter downspouts. Adding a 2 by 3 rectangular downspout for instance boosts your gutter s capacity by 600 square feet of drainage area. Round downspouts come in various sizes and colors and mostly used with half round gutters.

Downspouts and gutters are sized in relation to rainfall on this basis. There is a range of downspout styles which are available in the market as listed below. 2 by 3 inches 600 square feet. Gutter professionals have experience matching the gutters and the downspouts.

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.