Measure Roof Pitch Framing Square

The triangle shaped square was invented in 1925 by albert swanson to provide a quick accurate method for marking rafters.

Measure roof pitch framing square.

How to use a framing square and its etched on tables to figure out roof slope rafter lengths. A carpenter s framing square includes some tables stamped right into the tool itself. Now measure back up the rafter 3 8 which is. From this point along the top of the rafter measure 3 3 and put another plumb cut at this mark.

To accurately calculate the area of your roof you must first determine its slope or pitch. These articles explain various methods for measuring all roof data. Thus a moderate 6 in 12 roof pitch means that the roof rises 6 inches vertically for every 12 horizontal inches it runs. Because of its compact size it is frequently used as a saw guide when cutting framing members as well as a layout tool for quick 45 and 90 degree cuts.

It is often compared to slope but is not exactly the same. In the united states a run of 12 inches 1 foot is used and pitch is measured as the rise of the roof over 12 inches. Fix stair gauges on the framing square to mark the pitch. For a 5 12 roof pitch take your framing square and with the 5 on the tongue and the 12 on the body with the heel of the framing square below the rafter scribe along the tongue to give the plumb cut.

A roof s pitch is determined by how much it rises vertically for every foot it runs horizontally. So if the pitch of your roof is 7 12 place one stair gauge on the vertical part of the framing square the tongue at the 7 inches 18 cm mark and place one stair gauge on the horizontal part of the framing square the body at the 12 inches 30 cm mark. Finding the pitch of a roof is simple with a speed square. Roof slope or pitch rise run area and other features.

How roof pitch is calculated. This article explains how to make quick use of a framing square and its imprinted data to get some basic roof measurement data like roof pitch or slope rafter lengths and end cuts. Roof pitch refers to the measurement of the slope of a roof and you express this as a ratio.