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wood slabs checking

10/23/15       
Jason peterson

I have a 4" thick slab 42" wide and it has a crack in the middle..it has a metal staple hammered into end over the crack . what is that material called? and where can I get them?

10/23/15       #2: wood slabs checking ...
rich c.

I've always called them pinch dogs. Don't know if these are big enough for your application.

Highland Woodworking Piinch Dog

10/23/15       #3: wood slabs checking ...
Dale Lenz

Did you seal the ends. Is the center of the tree in your timber?

10/25/15       #4: wood slabs checking ...
Gene Wengert-Wood Doc

The forces that are developing or have developed such a crack are very large and a staple at the end will not help. For over 130 years, the railroad tie industry has used an S-iron on the ends of ties to control splitting. These are quite large. Anchor Seal also sells a plastic version. I think either would not work on 4" or thinner material as they are too big. I did see one mill that put a thick metal band down the side, across the end and up the other side a few inches. This will help until the wood shrinks as it dries and then the band is loosened.

In short, a wide piece, especially if it is containing the pith or close to the pith, is going to crack, even if end coated. End coated, and slow drying might work well in a few cases away from the pith, but once the crack develops it is too late.

10/25/15       #5: wood slabs checking ...
ROD HAYS

I've had that probem also. I fill the cracks in with epoxy like here in this table top slab.


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