Rafter Pro Roof Layout Square

Draw a line down the edge of the tongue as shown in illustration b of the roof layout.

Rafter pro roof layout square.

Align the back edge of the tongue with the 187 7 8 mark. Pivot the layout square so that the number 7 on the common scale lines up with the edge of the rafter. Here s how to make sense of all the numbers on your square and get the most out of this tool. For every foot.

Starting at the pivot point. At the top of the rafter place the rafter square on the face of the rafter as in figure 7. More they usually claim that 4 12 is the lowest you can go without any special underlayment. 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.

Common rafters are the most common type of rafter in construction. Learn the 1 rafter design that will guarantee your roof that is safe and strong for years to come. This is our ultimate roof rafter guide for people designing and building an off grid cabin or tiny home. Use this calculator to find your rafter length.

Before you cut your boards you ll need to measure the width of your building and calculate the exact length of each rafter. Common rafter layout 1. Place the square as before aligning the 6 mark of the tongue and 12 mark of the body with the top edge of the rafter material. The angle at which the.

For example the right triangle has by definition one ninety degree angle. Allow for ridge thickness when determining rafter run to outer wall. The rafter square is designed to take advantage of the geometric laws of the right triangle. Print full scale rafter cut templates and birdsmouth templates fold template over rafter to mark or cut through.

Discover the pros and cons to multiple roof designs. See rafter run to outer wall calculator below. The roof rafters provide integral structural support to the roof. Half building width minus 1 2 ridge thickness.

The rafter square or speed square does more than mark perpendicular lines. 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. First you ll want to find the pitch of your rafters which will help you find the length of your rafters. If the lumber is not straight always put the high or crown side up.