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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.
Structural ironworkers also erect joist girders, bar joists, and trusses, and also install metal decking. When one bullpin is inadequate, the Ratliff Technique [citation needed] may be utilized in order to force a bullpin to align itself straight with a hole, by driving another bullpin or driftpin between a steel member, and the first bullpin.
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).
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.
Cold-formed steel, especially in the form of thin gauge sheets, is commonly used in the construction industry for structural or non-structural items such as columns, beams, joists, studs, floor decking, built-up sections and other components. Such uses have become more and more popular in the US since their standardization in 1946.
Steel fixer ("ironworker" USA, also "rodbuster" USA/Australia), a tradesperson who positions and secures reinforcing bars and mesh used to reinforce concrete on construction projects. [12] [13] This trade is usually included with Ironworkers. Teamster, operator of highway trucks used to haul heavy loads on paved roadways.