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A Jig for Ripping Crooked Lumber

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Jobsite Know-How

A Jig for Ripping Crooked Lumber

A strip of plywood, some blocks, and a table saw will help you salvage crooked framing lumber by safely ripping a straight edge 


By By Matt Jackson December 5, 2018
This article first appeared in the December 2018 issue of Pro Remodeler.

Cutting a straight line on a crooked board can be difficult and dangerous if you attempt to do it freehand [1]. Using a jig is not only safer, it does a better job. Here’s how to build it.

Find a scrap of plywood with a factory edge and rip it about 5 inches wide. Fasten a backing block to the end [2], then screw a push board into it [3], forming the business end of the jig.

Screw small blocks into the straightedge at each end, spaced to approximately match the length of the crooked wood [4]. Attach a second block on top of the first to hold down the workpiece [5] while you move it through the table saw [6]

With a straight edge established, you can remove the jig, flip the lumber over so the straightened edge runs against the fence, and rip it to the width you need. 

Get more Jobsite Know-How here


written by

Matt Jackson

Master Carpenter

Matt Jackson is a master carpenter who lives and works in Rapid City, S.D. He is a contributing editor to ProTradeCraft.com, where a version of this article first appeared.


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