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The first joist in 1923 was a Warren truss type, with top and bottom chords of round bars and a web formed from a single continuous bent bar. Various other types were developed, but problems also followed because each manufacturer had their own design and fabrication standards.
This type of truss is seen in a framed roof consisting of rafters and a ceiling joist, [13] and in other mechanical structures such as bicycles and aircraft. Because of the stability of this shape and the methods of analysis used to calculate the forces within it, a truss composed entirely of triangles is known as a simple truss. [ 14 ]
A truss connector plate, or gang plate, is a kind of tie. Truss plates are light gauge metal plates used to connect prefabricated light frame wood trusses. They are produced by punching light gauge galvanized steel to create teeth on one side. The teeth are embedded in and hold the wooden frame components to the plate and each other.
In 1951 Bloedel, Stewart and Welch merged with H.R. MacMillan to form MacMillan Bloedel Limited. [1] The two companies had timber holdings side-by-side and there was a natural synergy from this merger. Bloedel, Stewart and Welch held many timber resources and MacMillan was the first truly integrated forestry company in British Columbia.
John Calvin Jureit (July 24, 1918 – September 9, 2005) was an American civil engineer and the inventor of the Gang Nail connector plate, used in building construction specifically for the joining of timber truss joints of roof, floor trusses and prefabricated wall panels. This invention has been widely credited for the boom in affordable ...
Stanley Macomber (November 26, 1887 – May 15, 1967) was an American inventor. He designed and patented the open web joist floor system, and founded the Massillon Steel Joist Company of Massillon, Ohio, and the Macomber Steel Company of Canton, Ohio.
Website www.weyerhaeuser.com The Weyerhaeuser Company ( / ˈ w ɛər h aʊ z ə r / WAIR -how-zər ) is an American timberland company which owns nearly 12,400,000 acres (19,400 sq mi; 50,000 km 2 ) of timberlands in the U.S., and manages an additional 14,000,000 acres (22,000 sq mi; 57,000 km 2 ) of timberlands under long-term licenses in ...
A similar situation occurs where the I-joist crosses a main beam. Installing squash blocks (2×4 materials 1 ⁄ 16 in or 1.6 mm higher than the I-joist) alongside the I-joists transfers the load from the I-joist onto the beam. Missed nails and glue setting too fast can lead to an uneven or squeaky floor.