Gable Roof Rafter

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.

Gable roof rafter.

Rafter span tables use these tables to determine lengths sizes and spacing of rafters based on a variety of factors such as species load grade spacing and pitch. Rafter length calculator calculate the length of a rafter from the roof slope ratio of inches per foot and a building width measurement. Along the top center of the house there is a beam to which are attached the rafters. 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.

Visit the roof framing page for more information on cutting roof rafters and visit the roof pitch calculator for determining rafter lengths based on rise and run. The calculator provides online calculate the length of rafters a gable roof. The roof rafters provide integral structural support to the roof. Attach your rafter to one side of the ceiling joist using construction nails then hammer nails from the ridge board into the rafter.

The image clearly shows all the options you want. Includes result for hip valley factor slope factor and the roof slope in degrees. Before you cut your boards you ll need to measure the width of your building and calculate the exact length of each rafter. In the select dimensions you need to make the roof by selecting appropriate units of measurement.

Put rafters in the center of your roof to support the ridge board. Gable roof framing calculator plan diagram with full dimensions for a good straight fascia add an extra inch or 2 to the tails of all your rafters total length. Each rafter is in turn fastened to the top of the exterior structural walls. It is always better to have a large rafter rather than be concerned with a sagging roof.

Here we have a wood framed gable roof. As we discussed in exterior house designsthere are many different house roof types. If your project had a rafter length of 8 or less a safe and strong method is to use 2x8 framed 16 on center. In conventional gable roof framing the slope of the roof is formed by rafters that run diagonally downward from the peak of the roof to the tops of the exterior walls of the building.

The calculation of the shed roof rafters run another calculator. If you add an eaves overhang dimension then the amount the rafter sticks passed the wall will be added to the rafter length. Find the ceiling joists closest to the middle of your structure.