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The 1991 release is the first release which mentions LVL. LVL is mentioned as a subcategory of structural glued laminated timber. [1] [4] The first explorations into engineered lumber happened during World War II in the United States. In 1942, an increased demand for wood caused a sudden timber shortage.
The 2,010-square-metre (21,600 sq ft), 34-metre-high (110 ft) vesica piscis-shaped building formed the frame with a glued-laminated timber beam and steel-rod skeleton covered with a glass skin. Considering the conventional mode of construction with steel or reinforced concrete moment-frame, this glulam-and-steel combination case is regarded as ...
To make transportation easier, wood preparation usually was done before shipment. Large labor crews were involved, and vigas were transported from the mountains by teams of oxen. [10] Some construction historians have mentioned the use of latillas under the vigas for carrying poles. [11] Wood cutting was an important aspect of material production.
The beams are continuously formed, so the length of the beam is limited only to the maximum length that can be handled and transported. Typical widths are 3 + 1 ⁄ 2, 5 + 1 ⁄ 4 or 7 inches (89, 133 or 178 mm); typical depths are 9 + 1 ⁄ 2, 11 + 7 ⁄ 8, 14, 16 and 18 inches (240, 300, 360, 410 and 460 mm). Typically the beams are made to a ...
For ceilings heights of 8, 9 or 10 feet (2.4, 2.7 or 3.0 m), ... Fungi attack wood (both timber and lumber) when these conditions are all present:
Lumber prices. Presently there is a healthy lumber economy in the United States, directly employing about 500,000 people in three industries: Logging, Sawmill, and Panel. [62] Annual production in the U.S. is more than 30 billion board feet making the U.S. the largest producer and consumer of lumber. [62]
Engineered components are commonly used to form floor, ceiling and roof structures in place of solid wood. I-joists (closed-web trusses) are often made from laminated woods, most often chipped poplar wood, in panels as thin as 1 cm (0.39 in), glued between horizontally laminated members of less than 4 cm by 4 cm ( two-by-twos ), to span ...
Artesonado in the Throne Room of the Aljafería in Zaragoza, Spain Artesonado in the Tlaxcala City Cathedral, Mexico. Artesonado or Spanish ceiling is a term for "a type of intricately joined wooden ceiling in which supplementary laths are interlaced into the rafters supporting the roof to form decorative geometric patterns", [1] found in Spanish architecture.
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