Rafter Pro Roof Layout Square

Next set the framing square on top of the rafter beam and use a pencil to trace the outside edge of the framing square s tongue.

Rafter pro roof layout square.

Position the square so the 6 mark on the tongue and the 12 mark on the body align with the top edge of the rafter material. Perfect for sheds garage patio covers. 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.

The angle at which the. The rafter square is designed to take advantage of the geometric laws of the right triangle. S5 s8 s9 s12 s21 s24 s29 32 jack rafters layout right side. Place the square with its fence on the top edge of the lumber.

For example the right triangle has by definition one ninety degree angle. Pivot the layout square so that the number 7 on the common scale lines up with the edge of the rafter. Place the square on the rafter material as shown in illustration a. Run is the horizontal distance that the rafter covers.

Once you ve marked the lines use your pencil to draw the diagonal length on the rafter. For a gable roof the run is measured from the centerline of the ridge board to the outside edge of the top of the wall. First you ll want to find the pitch of your rafters which will help you find the length of your rafters. Pyramidal roof framing plan truss layout jack rafters layout left side.

Common rafter layout 1. Once you know the pitch and the total run you can lay out the cuts of the rafter in a number of ways. 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. Stepping off the rafter.

To cut roof rafters start by fixing the stair gauges on your framing square to the dimensions of your pitch. Measure from this mark top edge of material a distance of 187 7 8 and put a mark. Clamp stair gauges to the framing square to align rise and run. S1 s4 s13 s16 s17 s20 s25 28 hip rafters layout.

Starting at the pivot point. Start at the ridge. Common rafters are the most common type of rafter in construction. Today we are tackling a big beginner lesson which is common rafter layout and cutting.

The simplest method is to step off the layout in 1 ft. Speed square made simple https youtu be rraefmk7f8 speed square made. Increments using a framing square. Use this calculator to find your rafter length.

If the lumber is not straight always put the high or crown side up. Many conventional roofing products such as shingles mandate a slope no lower than 2 12.