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Layout Square

By Chris Baylor, About.com

Layout Square

Layout Square

(c) 2007 Chris Baylor licensed to About.com, Inc.
Definition: A layout square is a triangular-shaped measuring tool designed for making square marks or angles on stock. Layout squares are usually available in 6 and 12-inch models, but the six-inch model is far more common.

The layout square has three major functions. First and most often, it is used for making square marks on a piece of stock. They work well when one needs to make a square cut on something like a 1x4 or 2x6.

Second, a layout square has markings making it easy to determine an approximate angle of a mark or cut. Simply place the square corner of the layout square at the point where the angle meets the long axis of the stock and check the angle based on the marks on the layout square. The instruction booklet that comes with many of these squares shows precisely how to do this.

Finally, a layout square allows the user to mark angles in a similar manner to the method for determining an existing angle. Once again, this is covered completely in the guide which accompanies the square.

One final bit of advice: layout squares are typically available in either aluminum or plastic models. Choose the aluminum, as they're practically indestructable. The plastic ones are a bit cheaper, but they won't last nearly as long.
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