# How to Figure Roof Rafters?

The way to figure roof rafters is a complicated math formula. You basically measure the bridge and then multiply that figure by one half the roof span. For more information look here: www.tpub.com;
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How to Figure Roof Rafters
A variety of methods exist for calculating a roof rafter's length without measuring the rafter directly. One of the simplest uses the Pythagorean theorem to calculate the roof rafter length from the rise and run of the roof. This theorem states that the... More »
Difficulty: Moderate
Source: www.ehow.com
Q&A Related to "How to Figure Roof Rafters?"
 1. Measure the distance from the edge of the outer wall on the end of the house to the opposite outer wall on the same end of the house. This measurement is the span of the roof. http://www.ehow.com/how_8483459_figure-roof-rafter...
 In olden days we used to have big parties when one used to lay the roof rafters for their house. They believed that work well planned is as good as half done! http://answers.ask.com/Home/Other/how_to_build_roo...
 decide what pitch you want.For example an 4/12,8/12,10/12 and so on.Measure your building outside of wall to outside of wall.Take half that distance for example 30ft. you would step http://wiki.answers.com/Q/How_do_you_figure_rafter...
 Hi Cameron, the birds mouth angle is related to the rafter angle. Are you familiar with a framing square and know how to make your peak angle cut using the framing square? Say you http://en.allexperts.com/q/Building-Homes-Extensio...
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It is important to correctly figure the length of a roof rafter. A roof rafter is a wooden beam that extends from the roof's ridge to the exterior wall of a house ...
1. Measure the horizontal distance of the frame using your tape measure. Divide the number by two to get the run. 2. Determine the pitch and rise for the roof. ...
1. Measure the horizontal distance of the frame using your tape measure. Divide the number by two to get the run. 2. Determine the pitch and rise for the roof. ...