How To Cut Rafters Fro A One Way Roof

Measure and mark plumb cut.

How to cut rafters fro a one way roof. Take a break from the measuring by cutting the top end of the rafter first. There are a few options available to the roof. The ridge cut also called the plumb cut at the top of the rafter the birdsmouth cut which itself comprises 2 different cuts where the rafter meets the building s wall and the tail cut at the base of the rafter. This video will show you how to figure length and cut a common rafter for a gable roof using a framing square.

Before you cut your boards you ll need to measure the width of your building and calculate the exact length of each rafter. Once you ve marked all of your rafters you can complete all of the cuts in each rafter one after the other which will help you to save time. For a 24 foot wide building the run would be 12. This ensures that you make the birdsmouth cut at the right length in the rafter.

Cut the rafters to find the location of the rear lentil for the rafters use a framing square. Once you located where the mark falls on the 2 x 10 measure the distance and be sure to add 10 for the overhang. Then divide the span by two to get the rafter run the length each rafter must cover. You may hear a carpenter say your house has a 4 12 roof what he s saying is the roof on your house rises 4 inches for every 12 inches of horizontal run.

After you have marked the first rafter it can be used as a template for other rafters after cutting. Mark the heel cut on the other end of the board. Use the template you completed in step iii to map out the rest of the rafters you ll need for the entire roof. Make a mark along the top edge of the rafter where this measurement ends.

Choose or determine a pitch the angle at which the rafters rise. Cutting the remaining rafters. Whether the roof is a simple gable roof or a complex roof with multiple hips and valleys you want to be able to cut more than one rafter at a time. That s the magic of creating a roof rafter in it s most basic form.

Use the square root figure to measure along the top of the rafter. First determine the width of the building the rafter span and the length for the number of rafters that will be needed. When you cut the rafters you ll need to make 3 separate cuts. Step 4 cut on the marking.

Cutting a half dozen or more rafters is what you want to try for. The roof rafters provide integral structural support to the roof. Cut one end of each 2 x 8 rafter to get the necessary length desired.