In article .com, wrote:

Doug Miller wrote:



(with minor editing by FF)

Specifics: (side hardness in lf-ft) (Actually pounds force: lbf)

Oops, typo, sorry. Meant to type "lb-ft". Thought I had. Thanks.

(Sugar) saccharum 1450
(Black) nigrum 1180
(Red) rubrum 950
(Silver) saccharinum 700


Also:

(Bigleaf) macrophyllum 833
My source shows 850, FWIW.

(Boxelder) negundo 720

There are other species like striped maple (pennsylvaticum)
but those above are about all the commercial species found
in the US.

--
Regards,
Doug Miller (alphageek at milmac dot com)

Nobody ever left footprints in the sands of time by sitting on his butt.
And who wants to leave buttprints in the sands of time?