At 01:33 PM 4/5/2002 +0000, you wrote: > and the pin doesn't climb > >out of it's hole" > > > > >Hi Ron, > Do you have any proof of that statement? Hydrolic action in soils, >causes fence and telegraph post to creep out of the ground.( very well >documented) >With humidity swings in maple, why would the same effect not exist? High >humidity exerts pressure on the bottom and sides of the pin, and the top is >free to move. Once you swing back to a low humidity condition, it's >possible for the pin to move, dependent on friction. but it can only move >up, and to the side that is being forced by the side bearing. > >Just some fgoood for thought. > >Regards Roger I've seen pins which have migrated out of the holes. I could tell by the layering of oxidation colouring on the pins. Jon Page
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