man using a square to check for accuracy
Photo: Nedjelko Matura
« »

Checking a Square for Accuracy

Before you use a framing square (or a combination square or try square, for that matter), make sure it’s accurate. Align the tongue on a straightedge and draw a line down the blade. Then flip the tongue over along the edge, and draw another line down the blade in the same place. If the lines are parallel, the square is true, but if they make a narrow X or V, it’s off.
Ask TOH users about Hand Tools

Contribute to This Story Below