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Plywood is a composite material manufactured from thin layers, or "plies", of wood veneer that have been stacked and glued together. It is an engineered wood from the family of manufactured boards, which include plywood, medium-density fibreboard (MDF), oriented strand board (OSB), and particle board (or chipboard).
Medium density overlay panel, or MDO panel, is a paintable surface made of plywood with a weather-resistant resin overlay bonded to the wood by heat and pressure. The overlay, which has at least 27% resin content, [1] resists water, weather, wear and degradation. A similar product with a more rugged, smoother surface is called high density ...
Cross-laminated timber (CLT) is a subcategory of engineered wood [ 1 ] panel product made from gluing together at least three layers [ 2 ] of solid-sawn lumber (i.e. lumber cut from a single log). [ 3 ] Each layer of boards is usually oriented perpendicular to adjacent layers and glued on the wide faces of each board, usually in a symmetric way ...
Shear wall. A typical timber shear wall consists of braced panels in the wall line, constructed using structural plywood sheathing, specific nailing at the edges, and supporting framing. A shear wall is an element of a structurally engineered system that is designed to resist in- plane lateral forces, typically wind and seismic loads.
Plywood and OSB typically have a density of 560–640 kg/m 3 (35–40 lb/cu ft). For example, 9.5 mm (3 ⁄ 8 in) plywood sheathing or OSB sheathing typically has a surface density of 4.9–5.9 kg/m 2 (1–1.2 lb/sq ft). [48] Many other engineered woods have densities much higher than OSB.
Oriented strand board. OSB is easily identifiable by its characteristic wood strands. Oriented strand board (OSB) is a type of engineered wood, formed by adding adhesives and then compressing layers of wood strands (flakes) in specific orientations. It was invented by Armin Elmendorf in California in 1963. [ 1 ]
The purlins are the large beams perpendicular to the rafters; from this shot, it appears that there are three purlins on either side of the roof. The sheathing boards are sometimes called the roof deck and are painted white. A purlin (or historically purline, purloyne, purling, perling) is a longitudinal, horizontal, structural member in a roof.
The construction frames of a residential subdivision in Rogers, Minnesota in 2023. Framing, in construction, is the fitting together of pieces to give a structure, particularly a building, support and shape. [ 1 ] Framing materials are usually wood, engineered wood, or structural steel. The alternative to framed construction is generally called ...
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