AECT250-Lecture 18

AECT250-Lecture 18 - Lecture 18 Open Web Steel Joists Open...

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Lecture 18 - Page 1 of 10 Lecture 18 – Open Web Steel Joists Open web steel joists, or “Bar Joists” are very efficient structural members commonly used to support roofs, and to a lesser degree, floors. Roof construction of Clark Field House facility at SUNY Delhi Steel joists are NOT considered structural steel. As such, they are manufactured as proprietary structural members by various manufacturers. The Steel Joist Institute , SJI, is an organization founded in 1928 that was established to set standards for manufacture, design and construction of joists. It recognizes manufacturers who comply with their standards. Some of the larger SJI recognized manufacturers include Vulcraft, Canam Steel Corp. and SMI Joist Company.
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Lecture 18 - Page 2 of 10 K-Series Joists The most commonly-used joist style is the so-called “K” series. It has a depth ranging from 8” up to 30” and is used economically to span up to 60’-0”. A typical K series joist is as shown below: A typical designation is 18K3 Section Number = Relative size of members Actual depth in inches K series
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Steel joists are fastened to its supporting members usually by field- welding as shown below: Unlike structural steel beams, steel joists must use bridging placed perpendicular to the span to obtain its stability. This bridging can be one of 2 types: Horizontal Bridging Diagonal Bridging Bridging requirements are shown in the Vulcraft Joist Catalog p. 9 and 35
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This note was uploaded on 05/05/2009 for the course AE AE250 taught by Professor Hultenius during the Fall '08 term at SUNY Delhi.

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AECT250-Lecture 18 - Lecture 18 Open Web Steel Joists Open...

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