Rafter span tables3/18/2024 Here is the Identification of each line of numbers on the blade This key is at the left end of the front of the framing square Tables give the length of the rafter per foot of horizontal run.Ībove we see the key to the lines in the rafter length table. You need first to understand the type of rafter you are cutting.įor a common rafter, or for each of the other rafter types, these To use the rafter length tables on the framing square blade front Normally roof slopes are expressed as inches of rise per foot of Our sketch above illustrates the concepts of run (horizontalĭistance) and rise (vertical distance) along the length of a rafter. The full scale number will be the length of the rafter in inches for The rafter tables allow you to calculate the length of a rafter byĬhoosing a "full scale" number that matches the unit rise (slope or Here we describe how to use the rafter tables found on the front How to Use the Framing Square Rafter Length Tables - the Rafter Tables We also provide a comprehensive ARTICLE INDEX for this topic, or you can try the page top or bottom SEARCH BOX as a quick way to find information you need. This article series gives clear examples just about every possible way to figure out any or all roof dimensions and measurements expressing the roof area, width, length, slope, rise, run, and unit rise in inches per foot. Roof measurement methods: these articles explain various methods for measuring all roof data: roof slope or pitch, rise, run, area, and other features. How to use the rafter tables on a framing square to measure & lay out rafters or to figure roof pitch, slope, length, and all other roof and angle measaurements.Īlso use these tables for stair rise and run and riser heights and stair stringer layout. We have no relationship with advertisers, products, or services discussed at this website. InspectAPedia tolerates no conflicts of interest.
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