Gutter And Downspout Design

Offset of more than 10 ft 3 0 m can affect drainage capacity.

Gutter and downspout design. The design of gutter and downspout assemblies is an area of building design which demands special attention. 3 by 4 inches 1 200 square feet. Connect areas d and a with one gutter. In addition to gutter and downspout design the functionality and long term performance of your roof drainage system is critical.

Featuring durable plastic construction this extension can be buried bent or connected to additional sections. Please lower the maximum spacing between downspouts to see this effect. Measure the distance between each downspout and draw a thick line through the exact middle point between them. For practical purposes the roof gutter depths and areas used are assumed to hold true for all available gutter of a given style top width and material even though differences do occur.

Maintenance durability and longevity are important factors to consider when designing gutters and 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. Downspouts should be constructed with conductor heads every 40 ft 12 2 m to admit air and prevent vacuum.

The gutter outlet capacity should suit the downspout capacity. Connect areas c and b with one gutter. The proper slope is 1 inch down for every 20 feet of gutter. The following are detailed gutter design drawings based on the data that you entered above.

This will mark a high point for your gutter and the gutter leading from this point will gently slope downward leading in a different direction on different sides of this point. Make the gutter out of galvanized metal. The amerimax home products flex a spout downspout extension has the amerimax home products flex a spout downspout extension has a green color and rigid corrugated design for versatility. The gutter and downspout size required is highly dependent on the amount of gutter and the spacing of the downspouts.

2 by 3 inches 600 square feet. Adding additional downspouts will require less gutter and downspout volume resulting in smaller gutters downspouts. Design of roof drainage systems roof drainage. Wide or a 117 mm 4 1 2 semicircle.

Use the chart below to figure out how many extra downspouts you need. The downspout size must suit the bottom width of the gutter. Leaking gutters and downspouts can cause serious damage to a building s interior as well as exterior and repairs can be expensive.