tree volume question
apatry at sympatico.ca
Wed Feb 23 09:36:38 EST 2000
1 cubic metre is actually 227 board feet
Larry Stamm <lstamm at mcbridebc.net> wrote in message
news:389f8fba.39794759 at news.mcbridebc.net...
> On Sun, 6 Feb 2000 17:37:31 +0000, theo hopkins
> <thopkins at thopkins.demon.co.uk> wrote:
> >BTW. One cubic metre is 417 board feet.
> >theo hopkins
> That's true enough on the face of it, but it gets a bit more
> complicated when you start converting lumber and log volumes from
> imperial to metric.
> Metric lumber volumes are figured on the actual dimensions of the
> lumber, not the "nominal" dimensions under which most construction
> lumber is sold in North America. So since the actual cross section of
> a "2 x 4" is only 65.6% of its nominal cross section of 8 square
> inches, an Mbf of nominal 2 x 4's contains only 1.55 metres of lumber,
> not the 2.36 metres the conversion tables give you.
> And in British Columbia, metric log volumes are measured on the total
> solid volume of the log, with no allowances for kerf losses or losses
> due to solid wood defects. So a log that scales as 1 metre in BC
> would scale less than 417 fbm using one of the International or Doyle
> scales, usually by a factor of 25% to 50% less.
> Failing to take these factors into account has been the undoing of
> more than one sawmill trading across international borders...
> Larry Stamm
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