Roof Framing Notes

Ridge beam sits below the rafters.

Roof framing notes.

Unit of run is a fixed unit of measure always 12 inches for the common rafter. The point at which all the raftersare attached to. Roof sheathing shall be 15 32 apa rated sheathing with a panel index of 24 0. Refer to the figure as you study the terms discussed in the next paragraphs.

Span is the horizontal distance between the outside top plates or the base of two abutting right triangles. Russell road suite 12 las vegas nv 89118 tel 702 388 7755. Plywood or osb is the most common materials used for the roof sheathing. Roof framing is the next building component found within the load path.

Roof framing plan notes. There are several roof types. It must meet the local codes for thickness at least 3 8 which is also based on the rafter or truss spacing. In order to maintain the triangle shape there are specific requirements for how to fasten the corners of the triangle together.

The gable roof hip roof gambrel roof flat roof shed roof mansard roof and many more custom roof types. At panel edges and 12 o c. Transfers the loadof the roof through the raftersto walls below. Asphalt shingle can be installed on a pitch of 2 over 12 or greater.

Features associated with basic roof framing terms are shown in figure 2 2. Roof framing depends on the type of roof you want to build. Meeting current irc roof framing requirements means builders are really constructing very simple triangles using the rafters and ceiling joists because triangles are known to be the most stable shape. Refer to building elevations roof plan for existing new final roof configuration.

Similarly hip and valley rafters provide the point of connection for roof rafters framed at angles. Rafters act more like the top chord of a roof truss than as a roof joist. Framers stick building a hip roof you can learn a great deal about roof framing by understanding the concepts of framing a gable or shed roof. The ridge board is non load bearing and merely provides the point of connection for the opposing rafters and is only a nominal 1 thick.

A ridge board is a horizontal member of the roof frame. The pitch of the roof determines the roofing material you can use. In field unless noted otherwise on plans. Nail to framing with 8d common nails at 6 o c.