How To Use A Roofing Square Metric

If the inch line is 8 the number below it is 47 65 cm 18 76 inches.

How to use a roofing square metric.

A carpenter s framing square includes some tables stamped right into the tool itself. Then we describe and illustrate the additional features and uses designed into the stanley squares such as the pro tractor scale the inch scale and how to use the square as a saw guide. I go over a. How to use a framing square and its etched on tables to figure out roof slope rafter lengths.

Using the aggregate area of these simple shapes can yield a more accurate roof area to be used with the roofing material calculator. 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. The metric rafter square of claim 1 wherein said square includes a second table defining the angles of cuts for the several roof members and wherein the primary entry thereof is a series of numerical values for millimetres of rise per metre of run and there is provided a multiplicity of parallel series of entries defining the angles of the plumb and bottom cuts for common rafters and of the side cuts of jacks and for hip and valley rafters. The 10th and bottom line on the front side body of the square gives the backing angle directly in degrees.

Use the second row of numbers on the roofing square to determine the length of the hip or valley rafters. Multiply it by the total run of the common rafter. Framing square basics how to use one. A description of the quick square and pocket square and how they are used for rafter layout with illustrations and illustrated examples.

In most american states it is standard to express the pitch of the roof as a ratio so you should be able to locate it on blueprints and plans. For example you may find a ratio which says 8 16. More project and tips. Step 1 work out the ratio of the roof before you can use the roofing square you need to work out the ratio of the roof pitch.