Bridge cap materials

[Erwinspiano@aol.com]

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.> >> >>> 
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>> Del wrote
> A petty point, perhaps, but the amount of compression--i.e., the physical 
> displacement of the wood cells--is the same in both types of wood. As long 
> as the hole diameter and the size of the pin remains the same the amount of 
> compression would also be the same if you used spruce or balsa. The 
> resistance to that compression, however, is a whole other matter. The 
> tight-grain maple resists compression much more than does balsa--or the 
> earlywood of loose-grain maple. Hence the lower force required to drive the 
> pin into the loose-grain maple--there is much more earlywood in there. 
> Also, there is less long-term compression set in the latewood of any 
> species than there is in the earlywood. 

         Not petty but the same ,perhaps more articulate ,but the point 
remains though ,doesn't it, ? that if one wants a tighter fit pin ( more 
compression of the wood)  in a maple cap with wider  grain a smaller hole is 
required. That was my point.
            Dale 

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