Traditional Roof Framing

There are two basic methods of pitched roof construction.

Traditional roof framing.

A cut roof this is the traditional method of cutting the timber on site and building up the roof using rafters ridge boards joists and purlins etc the exact details being determined by the size of roof size of timbers etc. The butterfly roof is an. There are several variables to consider when determining the proper rafter size. Measure form the top of this line down the board to determine the line length or length of the rafter less the ridge.

Building codes such as the icc s 2012 international building code section 2308 10 roof and ceiling framing typically specify that where rafter ties are used they are required at intervals ranging from 12 to 24 o c. The best roof shape for a high wind area would be a hip roof but it s more expensive to construct than a traditional gable roof a common roof for sheds. However you should be very careful while doing this as one wrong cut can compromise the strength of the truss. Position the square at the end of the rafter board with the tongue on your left and facing away from you.

Truss a network of pre made usually double sloped beams connected or bridged by a bottom beam or brace. Rafter not pictured a supporting beam usually wooden that attaches to the peak of a roof and descends to an outer wall. 1 8 pitch is given so 24 x 1 8 equals 3 or unit of rise in inches. The a frame is very easy to identify.

This roof style is reliable and durable offering longevity to your investment. Joints on a traditional roof truss frame are mostly held together by metal plates or solid wood pegs. If the unit of rise in inches is 3 then the cut is the unit of rise and the unit of run 12 inches or 3 12. Weather you re building a shed roof or adding a dormer to your second story it is important to choose the proper size rafter.

This sizing guide for roof rafters will help determine what you need for your small project. Rafters are the traditional method for supporting a roof. Roof type chart 1. It s steep pointed roof which extends all the way to the ground.

With this type of roof truss it is possible to add as many webs as you want to the centre of the truss. The bonnet roof is identified with the extending ledge around the base of the roof. The other part of the. Our traditional roof style is a cost effective option when you re trying to stay within a budget but also add a new metal structure to your property.

Add the length of the overhang beyond this mark and. Benefits of a traditional roof style. Depending on the roof design and the roof rafter spacing.