Greg G. wrote:
I have looked on the web for this information and after 150 or so
sites, most only "mentioning" the seasonal expansion of wood floors, I
am hoping someone here has a favorite link they would share.

I am looking for a reference that details the expansion and
contraction characteristics of various woods in changing humidity
levels. Something along the lines of: "A change from 7% to 15% RH
results in 3.2% expansion cross-grain".

I have found numerous little charts and graphs depicting the hardness
and density of woods, but nothing that deals with their moisture
expansion characteristics.

Thanks,

Greg G.

Greg,

Try: http://www.natlhardwood.org/
specifically: http://www.natlhardwood.org/pdf/Hwds%20of%20NA.pdf

Also, try The Wood Handbook put out by U.S. Department of Agriculture,
Forest Service, Forest Products Laboratory
http://www.fpl.fs.fed.us/documnts/fp.../fplgtr113.pdf

The above may not have the specific information you are asking for but
these are great references.

Dave