Roof Joist Framing Construction Details

Not shown are the hip and valley rafters needed to tie the roof together where the rafters are framed at an angle to each other.

Roof joist framing construction details.

Continuing on from part 3. In a rafter roof all of these components are required to provide a stable roof. I joist construction details. Intermediate bearing with blocking panels.

Good installation begins with specification of the correct joist for the application. The construction of the flat roof is similar to that of the timber upper floor. The image below shows a cross section of our simple 12 x 13 house from the joist span tables section of this tutorial. In order to maintain the triangle shape there are specific requirements for how to fasten the corners of the triangle together.

Prescriptive roof consisting of the rafters a ridge board ceiling joists and collar ties. In addition to floor and roof framing details this guide includes recommendations for cantilevers and placement of web holes. I joists in floor and roof applications. Joists are placed on edge spaced at 400 600mm centres supported by external and internal load bearing walls.

End bearing in hanger supported by i joist s 44kb. End bearing in hanger supported by a beam. End bearing in hanger on a top plate. End bearing with rim board.

Let s consider a basic gable wood roof framing design. End bearing with rim joist. The function of each component is. 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.

End bearing with blocking panels.