Cold-Formed Steel Gravity Walls with Bridging and/or Sheathing

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dc.contributor.authorQian, B.
dc.contributor.authorSchafer, B.W.
dc.date.accessioned2020-01-20T20:27:18Z
dc.date.available2020-01-20T20:27:18Z
dc.date.issued2020-01
dc.descriptionTest Reporten_US
dc.description.abstractThe objective of this report is describe experiments conducted on cold-formed steel walls under axial loading with a variety of different bracing conditions. Cold-formed steel wall systems are commonly braced using small bridging channels that run through the web of the studs (discrete bracing) as well as by sheathing that is attached directly to the stud flanges. Previous research has shown that sheathing, on its own, can be a highly effective means of bracing studs; however, sheathing is not always present during construction and in some cases, e.g. a sprinkler system saturating a gypsum board panel, may not provide adequate restraint. As a result, discrete (all-steel) bracing systems are sometimes favored. All-steel bracing systems under ultimate applied loads can be costly – particularly if brace force accumulation, and commensurate loss of stiffness, is properly accounted for in the design. To better understand the flow of forces in cold-formed steel walls with combinations of discrete and sheathing bracing a set of pilot experiments have been conducted. The experiments consider (a) whether or not the discrete bracing is properly resolved at its end, (b) whether or not gypsum sheathing is in place, in addition to the discrete bracing, and (c) sequence of loading, i.e., when the gypsum sheathing is installed. Forces in the discrete bracing are directly measured as is displacement of the studs under load. The resulting tests indicate that bridging only plays a secondary role in bracing steel studs once sheathing is installed. It is intended to use these results to develop improved engineering guidance on the use of combined, steel bridging plus sheathing, bracing conditions for walls.en_US
dc.description.sponsorshipAmerican Iron and Steel Institute (AISI), Steel Framing Industry Association (SFIA)en_US
dc.identifier.urihttp://jhir.library.jhu.edu/handle/1774.2/62115
dc.language.isoen_USen_US
dc.relation.ispartofseriesCFSRC;R-2020-03
dc.subjectCold-formed steel stud wall, sheathing bracing, bridging, bracing strenth and stiffness, combined bracing, all-steel designen_US
dc.titleCold-Formed Steel Gravity Walls with Bridging and/or Sheathingen_US
dc.typeTechnical Reporten_US
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