Rafter Pro Roof Layout Square

Here s how to make sense of all the numbers on your square and get the most out of this tool.

Rafter pro roof layout square.

Common rafter layout 1. Pivot the layout square so that the number 7 on the common scale lines up with the edge of the rafter. See rafter run to outer wall calculator below. Discover the pros and cons to multiple roof designs.

Half building width minus 1 2 ridge thickness. Today we are tackling a big beginner lesson which is common rafter layout and cutting. For example the right triangle has by definition one ninety degree angle. Before you cut your boards you ll need to measure the width of your building and calculate the exact length of each rafter.

The angle at which the. The roof rafters provide integral structural support to the roof. Common rafters are the most common type of rafter in construction. The rafter square is designed to take advantage of the geometric laws of the right triangle.

Many conventional roofing products such as shingles mandate a slope no lower than 2 12. Allow for ridge thickness when determining rafter run to outer wall. This is our ultimate roof rafter guide for people designing and building an off grid cabin or tiny home. 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.

First you ll want to find the pitch of your rafters which will help you find the length of your rafters. 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. Learn the 1 rafter design that will guarantee your roof that is safe and strong for years to come. At the top of the rafter place the rafter square on the face of the rafter as in figure 7.

Use this calculator to find your rafter length. 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 rafter square or speed square does more than mark perpendicular lines. More they usually claim that 4 12 is the lowest you can go without any special underlayment.

If the lumber is not straight always put the high or crown side up. Print full scale rafter cut templates and birdsmouth templates fold template over rafter to mark or cut through. Align the back edge of the tongue with the 187 7 8 mark. Starting at the pivot point.