How To Set Out Roof Rafters

The rafter assembly is made by using an o s b.

How to set out roof rafters.

Mark and cut the first rafter image 1. Once the system is. Toenail 3 galvanized wood screws into the lentil. Measure the distance between the angled hip rafter and the top of the wall at 20 in 51 cm increments and cut jack rafters to fit.

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. 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. If you aren t using a ridge beam then you ll want to use plywood gussets to reinforce the connection at the apex of each set of rafters.

When you re toenailing a screw it s important to pre drill the holes before you begin setting the screws. For every foot. Then pre drill the rafter image 2. Use 8 penny nails to tack it together but do not drive the nails all the way in because you may need to make adjustments.

Move about halfway down the roof and repeat with a third set of rafters to provide support for the middle of the ridge board. A rafter is one side of the rafter assembly. Step 5 raise the ridge board and nail to the rafters on the marked lines. Depending on the size of the roof most hip roofs will have 4 6 short jack rafters that are spaced out every 20 inches 51 cm between the hip rafters and the king common rafters.

Gusset to attach two rafters together. These are used in almost every roof including a gable end roof lean to roof and hipped roof as well. You are ready to set out and cut the common rafter lengths as soon as the wall plates have been squared levelled and fixed strapped down onto the brickwork. You are going to cut out triangles that will cover the apex of each set of rafters.

Before you cut your boards you ll need to measure the width of your building and calculate the exact length of each rafter. To lay out a common rafter you need the pitch of the roof expressed in units of rise per foot of run in the gable roof example shown here a rafter with 6 in 12 pitch rises 6 in. The fourth step in the how to build a shed series this tutorial teaches you the necessary steps to building roof rafters. For an 8 10 shed one sheet of plywood should be fine.

How to measure or figure rafter length and mark and cut them accurately.