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Architects, engineers and builders found it difficult to compare rated capacities and to use fully the economies of steel joist construction. Gable steel joists being erected. Members of the industry began to organize the institute, and in 1928 the first standard specifications were adopted, followed in 1929 by the first load table. The joists ...
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.
Wood or steel floor frames usually include a rim joist around the perimeter of a system of floor joists, and often include bridging material near the center of a span to prevent lateral buckling of the spanning members. In two-story construction, openings are left in the floor system for a stairwell, in which stair risers and treads are most ...
In light-frame construction, a trimmer is a timber or metal beam (joist) used to create an opening around a stairwell, skylight, chimney, and the like. Trimmers are installed parallel to the primary floor or ceiling joists and support headers , which run perpendicular to the primary joists.
The same article said peak steel output came in 1953, when the company produced 35.8 million tons of steel while steelmakers in Europe and Japan were still struggling to recover from the war.
A double floor is a floor framed with joists supported by larger timbers.. In traditional timber framing there may be a single set of joists which carry both a floor and ceiling called a single floor (single joist floor, single framed floor) or two sets of joists, one carrying the floor and another carrying the ceiling called a double floor (double framed floor).
Poor welds weakened the joists. In some cases the roof joists have experienced catastrophic failure, resulting in at least 1 roof collapse. [5] With the collapse of 3 joists in 3 separate buildings confirmed, an inspection of all governmental structures was conducted in eastern Canada surveying how many of Robb Engineering's joists were being ...
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