Gable Roof Rafter Layout

Here we have a wood framed gable roof.

Gable roof rafter layout. Before you cut your boards you ll need to measure the width of your building and calculate the exact length of each rafter. Gable roof framing calculator plan diagram with full dimensions for a good straight fascia add an extra inch or 2 to the tails of all your rafters total length. Gable roof a gable roof has two opposite sides with equal slopes and equal spans that meet in the center of the roof at the ridge. The image below shows a cross section of our simple 12 x 13 house from the joist span tables section of this tutorial.

After they re up you can snap a line to mark and trim the tails in a nice straight line to make up for any ridge warp or marking cutting and fixing errors. If you re framing a gable roof on a new house or building a shed or even a doghouse with a gable roof you ll need to cut a number of roof rafters. You can use common rafters on any shed roof but they make the most sense when constructing a gable roof or lean to type shed roof where they can sit on or attach to top plates of a wall. Let s consider a basic gable wood roof framing design.

Floor beam span tables of residential structural design we will now look at roof rafter and beam design. Lean to rafters then connect to a ledger board against a wall of another shed or house. Continuing on from part 3. The roof rafters provide integral structural support to the roof.

Laying out hip valley and jack rafters takes experience and skill but if you re building a simple gable or shed roof all you need is the common rafter the basic building block of roof framing.