Roof Joist Framing Construction Details

Here we have a wood framed gable roof.

Roof joist framing construction details.

End bearing in hanger supported by a beam. Good installation begins with specification of the correct joist for the application. End bearing with blocking panels. Load bearing or primary structure usually constructed in timber in a residential construction.

The image below shows a cross section of our simple 12 x 13 house from the joist span tables section of this tutorial. I joist construction details. Let s consider a basic gable wood roof framing design. The function of each component is.

In addition to floor and roof framing details this guide includes recommendations for cantilevers and placement of web holes. End bearing with rim board. 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. Prescriptive roof consisting of the rafters a ridge board ceiling joists and collar ties.

End bearing in hanger supported by i joist s 44kb. Intermediate bearing with blocking panels. I joists in floor and roof applications. 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.

End bearing in hanger on a top plate. Continuing on from part 3. The construction of the flat roof is similar to that of the timber upper floor. In a rafter roof all of these components are required to provide a stable roof.

In order to maintain the triangle shape there are specific requirements for how to fasten the corners of the triangle together.