Laying Out Hip Roof Rafters

Determine the number of plywood sheets you ll need.

Laying out hip roof rafters.

This method is a great fallback that eliminates having to go through the mathematical machinations that the traditional methods for laying out a hip rafter typically require. I will attempt to describe the method i find that works the best for me. A hip rafter is laid out just like a common rafter with a few twists. We use 17 16 97 on the square instead of 12.

Laying out and cutting rafters is one. Finishing the hip roof 1. Laying out hip valley and jack rafters. Measure as precisely as possible down to the 1 4 inch 0 64 cm 1 8 inch 0 32 cm or 1 16 inch 0 16 cm.

Use a tape measure to measure the entire width of your building. Nail the plywood sheathing to. Common rafters are shortened 1 2 the ridge thickness hip rafters are shortened 1 2 the 45 degree angle of the rafter stock. There are a number of methods to accomplish marking and cutting out rafters.

Nail the jack rafters to the hip rafters and secure them to the walls. First we will need a framing square pencil and a measuring tape. Roof layout requires a number of steps. Recall what tools are used to fi gure layouts.

Depending on the size of the roof most hip. Hip rafter layout what is a hypotenuse. You can mark the width of the hip rafter onto the wall plates and cut the corner off like in the picture above so the plumb cut butts up tight. 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.

Most construction calculators have built in functions to make roof calculations even easier. To lay out a common rafter you need the pitch of the roof expressed in units of rise per foot of run. Begin by measuring the width and height of each of the 4 sides of. The method of shortening at the top is different.

Before you start cutting you first need to determine how long your roof rafters need to be and the angles at which you ll cut the top and bottom of the rafter.