Welding of stairs and railing systems. Ten years ago, the AISI standards were compartmentalized into discrete packages on such topics as: general provisions, header design, truss design, structural wall stud design, floor and roof system design, and lateral force resisting system design.Welded sheet steel for cold-formed steel members. Commonly attributed to Aristotle, these words ring especially true when examining the recent evolution of the AISI standards. Periodic special inspection is required for screw attachment, bolting, anchoring and other fastening of elements of the main windforce-resisting system, including shear walls, braces, diaphragms, collectors (drag struts) and hold-downs.“The whole is greater than the sum of its parts” is an often-used phrase. Periodic special inspection is required for welding operations of elements of the main windforce-resisting system. 1705.11.2 Cold-formed steel light-frame construction.Over the past several years, the AISI Committee on Framing Standards (COFS), with oversight from the AISI Standards Council, has worked hard to develop a “whole” document to cover the structural design of cold-formed steel framing. Quality Assurance for Wind Requirements.Today, the landscape is much different for cold-formed steel light frame construction. Cold-Formed Steel Framing. Track Furring Channel L-header Cold-Formed Steel Shapes Stud or Joist U-channelInspection Coordinator and the identity of other approved agencies to be retained. The shapes are known by the acronym S-T-U-F-L, for Stud, Track, U-channel, Furring, and L-header.
![]() Cold Formed Steel Framing Inspection Checklist Code Change ProposalQA includes those tasks designated “special inspection” by the applicable building code.Quality control is the responsibility of each contractor, subcontractor and installer on the project for their respective scope of work. While the proposal was not approved for the 2015 edition of the IBC, many of the requirements seemed relevant given today’s larger cold-formed steel framed buildings.Similar to the AISC and SDI standards, the AISI S240 Chapter D provisions define key terms, establish responsibilities, and set requirements for the following: QC programs, QC and QA documents, inspection personnel, inspection tasks, and nonconforming material and workmanship.Quality Control (QC): Controls and inspections implemented by the component manufacturer or installer to confirm that the material provided and work performed meet the requirements of the approved construction documents and referenced standardsQuality Assurance (QA): Monitoring and inspection tasks performed by a registered design professional, firm or approved agency other than the component manufacturer or installer to ensure that the material provided and work performed by the component manufacturer and installer meet the requirements of the approved construction documents and referenced standards. The AISI task group also considered recommendations from a recent ICC code change proposal for the International Building Code (IBC) authored by the National Council of Structural Engineers Associations (NCSEA) – ICC S145-12.![]() ![]() This is to ensure that the material supplied and installed is the correct product and in acceptable condition. Based on the contract, the owner has taken responsibility for hiring the QA inspector for all aspects of the work and has specified the frequency of observations needed to confirm that the work has been performed in accordance with the approved documents.According to AISI S240 Chapter D, all wall and floor framing material must be verified by both the QC and QA inspector both before and after installation. In this project, there is a subcontractor specifically assigned for construction of the cold-formed steel framing, and the general contractor has delegated the QC responsibility to them. 3-story cold-formed steel framed multi-family residential building.As outlined above, the contractor is designated as the “installer” in this example and is responsible for the QC portion of the requirements of AISI S240, Chapter D. The lateral stability of the structure is provided by cold-formed steel framed strap braced walls.Figure 1. The primary structure is composed of cold-formed steel framed walls supporting cold-formed steel framed floor joists and roof trusses. However, the installed placement, anchorage, bridging and bracing, as well as any mechanisms needed for transfer of lateral forces between the roof and walls systems, must be inspected during installation.If any of the inspections uncover materials or workmanship that is not in conformance with the approved construction documents, then the building may be subject to additional inspections. Screw connections in shear walls must only be periodically reviewed during and after installation, but each and every post-installed concrete anchor must be verified after installation.The roof trusses in this example building are most likely pre-engineered and pre-manufactured, meaning that the component manufacturer performs their own in-house QC during the fabrication of these assemblies. Lateral force resisting systems must be continuously reviewed during installation. Per AISI S240, Section D6.9, special documentation for welding and fastener procedures is required. After installation, all connections must be reviewed and verified for conformance with the approved construction documents.For this example building, the strap braced walls are connected by mechanical fasteners and post-installed concrete anchors. Ham radio deluxe reviewNonconforming gap between structural stud and track. This nonconformance must be brought to the immediate attention of the contractor and the installer, and brought into conformance or made suitable for its intended purpose as determined by the registered design professional.Figure 2.
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