Gutter Drainpipe Dimensions

The area to be drained by each section of gutter will be 1200 sq ft 111 5 sq m the rainfall intensity from table 1 2 col a is 6 in hr 152 mm hr the length of each gutter section is 40 ft 12 2 m and the ratio of gutter depth to width is 0 75.

Gutter drainpipe dimensions.

6 inch 7 960 square feet. The larger a gutter downspout the more water it can drain quickly. Gutter downspout sizes are 3 to 6 inches. Sdr indicates the pipe is made to the size dimension ratio standard.

If a roof s various drainage areas call for different size gutters go for the biggest one k style. The sizes available in this style are 3 4 5 and 6. 5 inch 5 520 square feet. Five inch k style gutters or 6 inch half rounds the most common residential sizes are able to handle the rainfall on most houses in most parts of the country.

But houses with big steep roofs or those located in climates prone to heavy downpours may need wider gutters and extra downspouts to keep rainwater from overflowing. Multiply the drainage area by the roof pitch factor and rainfall intensity to find out the adjusted square footage. This type of down spout is considered the standard downspout style in households and is used with a 5 k style guttering system. Round downspouts come in various sizes and colors and mostly used with half round gutters.

Most downspouts are rectangular but they can also be round or square. On chart 1 1 find the vertical line representing l 40 12 2 m. Then use the information below to see what size gutter you need.