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2. Parallel-strand lumber - Wikipedia

   en.wikipedia.org/wiki/Parallel-strand_lumber

   [citation needed] PSL can be made from any wood species, but Douglas fir, southern pine, western hemlock, and yellow poplar are commonly chosen [9] because of their superior strength. The product is manufactured as a 12-by-12-inch (300 mm × 300 mm) or 12-by-18-inch (300 mm × 460 mm) billet in a rectangular cross-section, which is then ...

3. Lumber - Wikipedia

   en.wikipedia.org/wiki/Lumber

   Wood cut from Victorian Eucalyptus regnans The harbor of Bellingham, Washington, filled with logs, 1972. Lumber is wood that has been processed into uniform and useful sizes (dimensional lumber), including beams and planks or boards. Lumber is mainly used for construction framing, as well as finishing (floors, wall panels, window frames ...

4. Box crib - Wikipedia

   en.wikipedia.org/wiki/Box_crib

   Cribbing is usually accomplished with blocks of wood, often 4×4 (3 + 1 ⁄ 2 in or 89 mm) or 6×6 (5 + 1 ⁄ 2 in or 140 mm) and 18–24 in (460–610 mm) long.Soft woods, like spruce and pine, are often preferred because they crack slowly and make loud noises before completely failing, whereas stiffer woods may fail explosively and without warning.

5. Hankinson's equation - Wikipedia

   en.wikipedia.org/wiki/Hankinson's_equation

   Hankinson's equation (also called Hankinson's formula or Hankinson's criterion) [1] is a mathematical relationship for predicting the off-axis uniaxial compressive strength of wood. The formula can also be used to compute the fiber stress or the stress wave velocity at the elastic limit as a function of grain angle in wood.

6. Janka hardness test - Wikipedia

   en.wikipedia.org/wiki/Janka_hardness_test

   When testing wood in lumber form, the Janka test is always carried out on wood from the tree trunk (known as the heartwood), and the standard sample (according to ASTM D143) is at 12% moisture content and clear of knots. [3] The hardness of wood varies with the direction of the wood grain. Testing on the surface of a plank, perpendicular to the ...

7. This Greenworks Electric Chainsaw Is a Rare 30% off ... - AOL

   www.aol.com/greenworks-electric-chainsaw-rare-30...

   Plus, the 48-volt chainsaw features a high chain speed of 0-3,940 feet per minute and provides up to 150 cuts on 4x4 lumber on a single charge. Meanwhile, the chainsaw features an electric start ...