Gutter Drainpipe Dimensions

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. This type of down spout is considered the standard downspout style in households and is used with a 5 k style guttering system. 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.

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Sdr indicates the pipe is made to the size dimension ratio standard.

Gutter drainpipe dimensions.

However too large a gutter downspout can look unattractive. Multiply the drainage area by the roof pitch factor and rainfall intensity to find out the adjusted square footage. Gutter downspout sizes are 3 to 6 inches. Under the sdr standard the actual thickness of the pipe wall is determined by dividing the pipe diameter by the index number thus a 4 sdr 20 pipe would have a wall thickness of 4 20 0 2.

The sizes available in this style are 3 4 5 and 6. 6 inch 7 960 square feet. On chart 1 1 find the vertical line representing l 40 12 2 m. The larger a gutter downspout the more water it can drain quickly.

Most downspouts are rectangular but they can also be round or square. Then use the information below to see what size gutter you need. 5 inch 5 520 square feet. It also comes in sizes 2 3 and 3 4.

If a roof s various drainage areas call for different size gutters go for the biggest one k style. 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. Round downspouts come in various sizes and colors and mostly used with half round gutters.

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