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The Janka hardness test (English: / ˈ dʒ æ ŋ k ə /; [1] German:), created by Austrian-born American researcher Gabriel Janka (1864–1932), measures the resistance of a sample of wood to denting and wear. [citation needed] It measures the force required to embed an 11.28-millimeter-diameter (7 ⁄ 16 in) steel ball halfway into a sample of ...
Thuja plicata is a large evergreen coniferous tree in the family Cupressaceae, native to the Pacific Northwest of North America. Its common name is western redcedar in the U.S. [2] or western red cedar in the UK, [3] and it is also called pacific red cedar, giant arborvitae, western arborvitae, just cedar, giant cedar, or shinglewood. [4]
Red oak rings in at a 1290 on the Janka scale (the higher the number, the stronger the board), and white oak comes in at 1360. Durability: Thanks to the wood’s open grain, wood stains take ...
Western white pine (Pinus monticola) Sugar pine (Pinus lambertiana) Southern yellow pine. Loblolly pine (Pinus taeda) Longleaf pine (Pinus palustris) Pitch pine (Pinus rigida) Shortleaf pine (Pinus echinata) Red cedar Eastern red cedar, (Juniperus virginiana) Western red cedar (Thuja plicata) Coast redwood (Sequoia sempervirens) Rimu (Dacrydium ...
Despite the danger of the profession, the industry was a large one throughout Washington and Oregon, and by 1893 Washington state alone had 150 mills which converted Western Red Cedar into shingles and shakes for the roofing and siding of American homes. The craft of shingle making demanded a high skill level and considerable manual dexterity. [4]
The Duncan Cedar, also known as the Duncan Memorial Cedar and the Nolan Creek Tree, is a large specimen of Western redcedar. The tree is located on the Olympic Peninsula in the U.S. state of Washington. [1] It is currently the largest known Western redcedar in the world, [2] (compare to the Cheewhat Giant on Canada's Vancouver Island. [3]
The hardest hardwoods are much harder than any softwood, [4] but in both groups there is enormous variation with the range of wood hardness of the two groups overlapping. For example, balsa wood, which is a hardwood, is softer than most softwoods, whereas the longleaf pine , Douglas fir , and yew softwoods are much harder than several hardwoods.
Both kinds of wood are hard (with a Janka hardness of 550 lbf (2,400 N)), but the western yellow pine wood is less dense than southern yellow pine wood (28 lb/cu ft (0.45 g/cm 3) versus 35 lb/cu ft (0.56 g/cm 3) for shortleaf pine). [6]