How Do You Measure A Roof Rafter

Before you cut your boards you ll need to measure the width of your building and calculate the exact length of each rafter.

How do you measure a roof rafter.

If you look at the rafter span chart you ll notice that 2x4s can be used for rafters on spans up to 11. Just enter the dimensions of the roof rise and run to get started. As a do it yourself builder you can expand your knowledge of basic roof construction by calculating the length of the rafters for a particular roof section or room. The pitch and span of your roof will dictate how long of a rafter you ll need use maximum span calculator to help you find your rafter size.

The roof rafters provide integral structural support to the roof. Our roof rafter calculator tools are handy for calculating the number of rafters needed rafter length calculator lineal feet of rafter board feed in ridge and sub facia and the total board feet in the roof. Weather you re building a shed roof or adding a dormer to your second story it is important to choose the proper size rafter. Given here are the formulae to calculate the length of a shed roof rafter to make your roofings stronger and look beautiful.

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. Anything beyond that you are looking at using 2x6s for most sheds. 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. This sizing guide for roof rafters will help determine what you need for your small project.

While making roofing for your house with the roof rafters it is important to know the rafter length to make the roof seat perfectly on the rafter. Once you located where the mark falls on the 2 x 10 measure the distance and be sure to add 10 for the overhang. Unlike rafters for flat roofs rafters for pitched gable and hip roofs rise at an angle from the outside walls and meet at a ridge. Cut one end of each 2 x 8 rafter to get the necessary length desired.

If you re building rafters and aren t sure where to start when determining the length of your lumber you re in the right place our rafter stock size calculator shows you how long your rafters should be so you ll know what you need in terms of framing lumber dimensional lumber studs and more. Make the final decorative edge cut using a template as before with a saw touch the end up with paint and set in place. There are several variables to consider when determining the proper rafter size.