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Old 04-08-2018, 12:28 PM
Nutcase Nutcase is offline
 
Join Date: Jan 2010
Location: Vernonia, OR
Posts: 26
Default Surface-mounted bridge armature

In the course of working on my floating bridge project, I began using a surface-mounted bridge armature made with two pairs of 3 1/2” blunt tee hinges. It worked out quite well. I’ve begun exploring other applications.

I wanted to rip some laths to support insulation falling down from between joists in my workshop ceiling. To do this, I improvised a very crude table out of an 8’ long strip of 1/2” plywood and two 6’ 2x4s laid side by side. The bridge armature mounts on the ends of the 2x4s sticking out beyond the plywood, so with a sufficient length of track, it is possible to rip a full 8’. I tacked on something for a fence. The whole thing went together with a total of nine screws.

I had this thing up on my jawhorse. The ends sagged visibly with the bridge up, but it gripped the material just fine with the bridge down.

As a lath-ripping setup, there are some things to change for dust clearance at the fence. A continuous fence isn't necessary in this application. But otherwise it worked fine. It set up and tore down quickly. Next time, though, maybe I'll invest in a 10' 2x6".
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