I think Hoadley's book has this info.

I have seen it in at least two articles of the major WW mags. Unfortunately
I remember not when or where. It depends on what the state of the wood is
when he puts it down. I think if he leaves 1/4 on both sides from the wall
and covers with a 3/4 molding he should be OK

----------
> From: Jim Weaver <JIM@s...>
> To: oldtools@l...
> Subject: Table for wood expansion
> Date: Tuesday, September 21, 1999 2:23 PM
>
> A friend of mine is putting down a kiln dried hardwood maple floor.  I
was
> explaining that he needed to provide for expansion and contraction of the

> wood and he asked me to quantify what the expansion/contraction would
> be.
>
> Is there a simple table somewhere that shows how much per foot various
> hardwoods expand and contract?
>
> Jim Weaver
>
> --
>