How Do You Measure A Roof Rafter

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.

How do you measure a roof rafter.

Cut one end of each 2 x 8 rafter to get the necessary length desired. 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. 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. 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.

You can calculate the rafter length with the. The roof rafters provide integral structural support to the roof. Given here are the formulae to calculate the length of a shed roof rafter to make your roofings stronger and look beautiful. 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.

Weather you re building a shed roof or adding a dormer to your second story it is important to choose the proper size rafter. 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. If you look at the rafter span chart you ll notice that 2x4s can be used for rafters on spans up to 11. 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.

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. Make the final decorative edge cut using a template as before with a saw touch the end up with paint and set in place. Rise and run means that a 6 12 pitch roof has 6 of rise vertical for each foot of run horizontal. 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.

Anything beyond that you are looking at using 2x6s for most sheds. Before you cut your boards you ll need to measure the width of your building and calculate the exact length of each rafter. Just enter the dimensions of the roof rise and run to get started.