Posted by LJD on February 07, 2012 at 15:25:50 from (75.251.53.150):
In Reply to: Re: Douglas fir beam posted by Stephen Newell on February 07, 2012 at 13:38:51:
Douglas Fir (Larch) is one of the stronger woods. 30-40 years ago, we'd have to special order Doug Fir for high-stress rafters and girders - before manufactured beams or were available.
Some of the highest strength woods are - Douglas Fir (Larch), White Ash, Shag-bark Hickory, Black Locust, White Oak, Yellow Pine, etc.
#1 structural woods in order of strength starting with strongest:
Shag-bark Hickory White Ash Yellow Birch Black Locust 13,000 PSI Sugar Maple Red Oak White Oak Rock Elm Beech Yellow Pine Douglas Fir - 11,000 PSI Western Larch- 11,000 PSI
#3 non-structural woods starting with the weakest: Balsam Poplar - 5000 PSI Northern White Cedar Hemlock Black Spruce Basswood Red Cedar Redwood Cypress Aspen Cottonwood Balsam Fir
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