Old Roof Rafter Size

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.

Old roof rafter size.

This calculator is to be used as an estimating tool only. This sizing guide for roof rafters will help determine what you need for your small project. For standard shed roof rafter spacing see rafter span chart. There is no standard spacing it depends on what size of rafters you want to use and the span of your shed.

All roof rafters should be identical so follow the same steps to measure the plumb cut tail cut and birdsmouth cut. Repeat the process for your other rafters. 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. If you get premium kiln dried lumber then you could span 10 5 with the same size of lumber and.

Roof pitch between 15 and 22 5 degrees with rafter spacing strength class c16 size of rafters in mm 400mm 450mm 600mm. Click the button to calculate the stock size needed for this job. Weather you re building a shed roof or adding a dormer to your second story it is important to choose the proper size rafter. There are several variables to consider when determining the proper rafter size.

At this point you ve cut 1 roof rafter.