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Excelsior, or wood wool. Wood wool, known primarily as excelsior in North America, is a product made of wood slivers cut from logs. It is mainly used in packaging, for cooling pads in home evaporative cooling systems known as swamp coolers, for erosion control mats, and as a raw material for the production of other products such as bonded wood wool boards.
Individual layers can also vary in thickness to give different finished panel thicknesses; typically, a 15 cm (5.9 in) layer will produce a 15 mm (0.59 in) panel thickness [citation needed]. The mat is placed in a thermal press to compress the flakes and bond them by heat activation and curing of the resin that has been coated on the flakes.
As for thickness, 5.5 cm (2.2 in) is average for Kyōma tatami, while 6.0 cm (2.4 in) is the norm for Edoma tatami. [6] A half mat is called a hanjō (半畳), and a mat of three-quarter length is called a daimedatami (大目畳 or 台目畳), which is used in tea-ceremony rooms . [4]
The thickness of the wood layer atop the core determines its ability to be sanded and refinished; engineered wood floors can generally be sanded and refinished 1-2 times, though some cannot be refinished while others can be refinished as many times as a solid wood floor.
For hardwood flooring, the test usually requires an 80 mm × 150 mm (3 in × 6 in) sample with a thickness of at least 6–8 mm, and the most commonly used test is the ASTM D1037. 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 ...
Plies vary in thickness from 1.4 mm to 4.3 mm. The number of plies—which is always odd—depends on the thickness and grade of the sheet. Roofing can use the thinner 16-millimetre (5 ⁄ 8 in) plywood. Subfloors are at least 19 millimetres (3 ⁄ 4 in) thick, the thickness depending on the distance between floor joists.
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3579 S High St, Columbus, OH · Directions · (614) 409-0683