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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Today's Featured Article - Hydraulics - Cylinder Anatomy - by Curtis von Fange. Let�s make one more addition to our series on hydraulics. I�ve noticed a few questions in the comment section that could pertain to hydraulic cylinders so I thought we could take a short look at this real workhorse of the circuit. Cylinders are the reason for the hydraulic circuit. They take the fluid power delivered from the pump and magically change it into mechanical power. There are many types of cylinders that one might run across on a farm scenario. Each one could take a chapter in
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