Roof Framing Notes

Roof framing is the next building component found within the load path.

Roof framing notes.

S2 20 roof framing plan dd package 04 08 11 5 s5 03 6 permit 04 22 11 revisions 06 06 11 3 steel stud details 7 permit review 06 27 11 s2 21 ceiling soffit framing plan permit review 07 08 11 2 philadelphia pa 19107 aramark corporation innovative dining solutions 4535 w. The point at which all the raftersare attached to. Typical floor sheathing shall be 23 32 apa sturd i floor with a panel index of 40 20. Ridge beam sits below the rafters.

There are several roof types. Nail to framing with 8d common nails at 6 o c. The pitch of the roof determines the roofing material you can use. Roof framing depends on the type of roof you want to build.

Refer to the figure as you study the terms discussed in the next paragraphs. Asphalt shingle can be installed on a pitch of 2 over 12 or greater. In order to maintain the triangle shape there are specific requirements for how to fasten the corners of the triangle together. The roof framing must support the roof decking and sheathing and resist loads applied to the sheathing and transfer loads vertically to support walls or frames.

It must meet the local codes for thickness at least 3 8 which is also based on the rafter or truss spacing. Refer to building elevations roof plan for existing new final roof configuration. Plywood or osb is the most common materials used for the roof sheathing. Roof sheathing shall be 15 32 apa rated sheathing with a panel index of 24 0.

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. Features associated with basic roof framing terms are shown in figure 2 2. Unit of run is a fixed unit of measure always 12 inches for the common rafter. Roof framing plan notes.

In field unless noted otherwise on plans. A ridge board is a horizontal member of the roof frame. 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. Transfers the loadof the roof through the raftersto walls below.

At panel edges and 12 o c. The gable roof hip roof gambrel roof flat roof shed roof mansard roof and many more custom roof types. Rafters act more like the top chord of a roof truss than as a roof joist. Similarly hip and valley rafters provide the point of connection for roof rafters framed at angles.