How To Measure Rafters For A Gable Roof

Roof width distance between the points of support of the rafters.

How to measure rafters for a gable roof.

This is usually the edge of the mauerlat on the external side of the wall. After they re up you can snap a line to mark and trim the tails in a nice straight line to make up for any ridge warp or marking cutting and fixing errors. Go until you get to the end. From there measure 16 down the top plate.

Includes result for hip valley factor slope factor and the roof slope in degrees. If you re using a 2x4 it ll measure 1 5 inches 3 8 cm. For a good straight fascia add an extra inch or 2 to the tails of all your rafters total length. To build your gable roof you ll need wooden boards cut into joists rafters supports and a ridge board in addition to sheathing felt paper and shingles.

Putting it together is relatively straight forward if you have basic carpentry skills and use precise measurements. Mark out where you are going to place your rafters. There are several variables to consider when determining the proper rafter size. Use the saltbox roof to calculate a two sided roof with different slopes spans and or overhangs for each side of the roof.

Subtract the width of your ridge beam. If you are doing 16 oc then start in from the front edge of your top plate where your first rafter is going to sit. Before you can mark the rafter lengths and layout check the camber of the timber. Rafter stock size calculator.

Measure the width of the ridge beam. Gable roof a gable roof has two opposite sides with equal slopes and equal spans that meet in the center of the roof at the ridge. This sizing guide for roof rafters will help determine what you need for your small project. Input the rafter span on the flat eave overhang and pitch of the roof.

Determine the camber along the timbers length. Weather you re building a shed roof or adding a dormer to your second story it is important to choose the proper size rafter. A gable roof is a simple symmetrical triangular roof. Click the button to calculate the stock size needed for this job.

The roof height is the distance from the level of the floor of the attic to the roof ridge. Roof overhang the. All running measurements are and on from start point to near side of rafter. Required for calculating rafter dimensions.

Lengths of roofing timber almost always bow slightly. The ridge beam is the vertical piece of plywood which will form the peak of the gable and to which you ll fasten the rafters on either sides. Calculate the length of a rafter from the roof slope ratio of inches per foot and a building width measurement.