Designing Gutter Downspout System

A 6 inch top width k style gutter can receive a 3 x 4 downspout.

Designing gutter downspout system.

The roof area to be drained is a key factor in designing gutters and downspouts. Design a gutter downspout system for a 40 by 80 foot free stall barn located near folsom la with a 4 12 gable roof. The above sizing is reflected in the development of figure 4 downspout outlet sizing leader pipe sizing. Remember a gutter downspout system is a containment sy.

The standard is about inch per 10 feet. A 4 x 5 downspout can also fit but again some trimming of the flange of the preformed downspout outlet may be required. Some downspouts simply can t move the water far enough away from your house on their own. The area of roof contributing runoff to each gutter and downspout should be determined.

Usually your gutter contractor will decide between 5 inch gutters with 2 by 3 inch downspouts or. Where the tube passes by the downspout from the gutter we installed a y fitting and drained the roof water from the gutter system directly into the main drainage line. How to design a gutter downspout system step 1. The map needs to be as close to scale as possible.

Gutters and downspouts do a great job of handling water run off from the roof but you also need to think about how your downspout drainage system is performing. Use the factor of 1 05 from table 2 to adjust the roof plan area for the 4 12 roof pitch. The amerimax home products flex a spout downspout extension has the amerimax home products flex a spout downspout extension has a rigid corrugated design for versatility. On the 80 foot long roof assume two down spouts on each side.

That line eventually emptied into the low spot in the back yard. Draw a map of your roof on a piece of paper. Get 7 or 8 inch gutters. When installing a gutter downspout drainage system be sure to avoid some of the common mistakes made.

They ll cost more and probably require a custom order through a professional installer. Increase the pitch of the gutter. A little water will fall off these edges but not enough. The above recommendations.

Design area for pitched roofs. Some soil absorbs and drains the water very well so a downspout that diverts water just a few inches away from your home. How to design an effective gutter system 3 factors to consider. Cross off any edge that isn t at the bottom of a slope.

Assume a level rectangular gutter with a depth to width ratio of 0 75. Once all the parts of the drainage system were installed we covered the tubes with several inches of rock. Increasing the pitch increases a gutter s. Featuring durable vinyl construction this extension can be buried bent or connected to additional sections.

You have three options. The maximum accumulation of rainfall occurs when it falls perpendicular to the roof plane.