Math For Roof Framing

This and following chapters describe roof framing using con.

Math for roof framing.

Roof framing questions for your custom printable tests and worksheets. Nominal 2 lumber is generally used for roof framing but i joists are increasingly common see chapter 13 engineered wood. In nordic climate a pitched roof is preferred so that rain water would not be accumulated on the roof which would happen in case. After doing this roof i know there s a lot more for me to learn especially with respect to tying in a blind valley.

It is almost impossible to frame a roof without knowing any mathematics especially trigonometry. If you know the slope x in 12 you want to use for your roof framing design you can use it along with the run r to determine the height of the ridge beam. It is needed for example to calculate the steepness of a roof the roof pitch. Any carpenter knows that the basis for roof framing is math.

While true craftsmen like roof guru sim ayers math and cad genius if you have seen his webpage who strive to carry on the age old art of roof framing can certainly dazzle us with the steel square s use to find cut fancy roof pieces many with names i can t even pronounce for me the steel square s principal use has been to layout stair stringers or cut fascia. A gable is a triangle formed by a sloping roof. In most cases the walls have also been sheathed to increase their strength and stiffness. Review of basic geometry pythagoras theorem and similar triangles needed for roof calculations.

The longer leg of the framing square is called the body and the shorter one leg is called the tongue. I like to be able to do the math to figure out the angles but in practice i prefer math free techniques of laying out and cutting framing. This is the basic problem involved in determining the length of a roof rafter a brace or any other member that forms the hypotenuse of an actual or imaginary right triangle. What books do you recommend.

Roof framing begins after the house walls have been framed. Pitches pitched roofs. The framing square is used most frequently to find the length of the hypotenuse longest side of a right triangle when the lengths of the other two sides are known. Browse our pre made printable worksheets library with a variety of activities and quizzes for all k 12 levels.

When a piece of lumber is added to a carpenter s square it becomes a right triangle.