AISI S—07 () AISI STANDARD North American Standard for. Cold- Formed Steel Framing— Header Design Edition (Reaffirmed ). Revision. AISI S Header Design *. – AISI S Lateral AISI S Prescriptive Method for One and Two . G, Using Chapter F of the NA Specification for the. The Standard for Cold-Formed Steel Framing – Header. Design(AISI S) is aimed at giving design professionals the tools they need to design headers.
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Yu, Wiley-Interscience Back to top. The scope was selected to provide coverage of the high volume application of cold-formed steel in light-framed construction. Sheathing and discrete bracing. The exception applies where the built-up section is seated properly in a track, and the top and bottom end bearing detail of the studs consists of a steel or concrete support with adequate strength and stiffness to preclude relative end slip of the two built-up stud sections.
The use of ASTM E results in higher nominal shear strength values as compared with the cantilever test method historically used for steel deck diaphragms. This new chapter lists applicable AISI test standards for cold-formed steel framing members, connections, and systems. Section reference table S and previous standard.
These applications include wall, floor and roof framing in a number of building types. The document addresses the design for a C-shaped cross section as a flexural member and a compression member. This chapter contains design provisions for cold-formed steel framing members s212–07 assemblies, as previously included in AISI S, S, S, and S Also, for ease of use, S contains a section reference table between the S provisions and the previous provisions Table 2.
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This limitation has been eliminated from AISI S; however, it should be remembered that mils is still the maximum thickness of standard products in the United States and 97 mils 0. The truss component structural performance load test and full-scale truss confirmatory test methods, previously included in AISI S, are provided in this appendix. The simple reason is, it was easier to develop small e212-07 documents versus a more comprehensive multi-topic document.
This chapter provides installation requirements previously contained in the various framing standards. The method assumes a sheathing strip carries the lateral load via tension field action. Your message Submit Comment. The previous design standards limited their application to framing members having a maximum base steel thickness to mils 0.
Format defines design s2120-7.
This document is intended to serve only as an educational tool. But, why would AISI develop six discrete framing standards as opposed to one design manual?
This appendix contains requirements for the determination of the rotational stiffness that structural sheathing provides to framing members to facilitate the design for distortional buckling. Six of these standards addressed the design of alsi elements, such as general provisions, wall studs, floor joists, trusses, headers, and shear walls. For curtain wall systems, the standard now permits the use of the bracing combination of sheathing attached to one side of the wall stud and discrete bracing for the other flange Figure 1.
The list of these standards, as well as other excellent design guides, are provided. For roof or floor diaphragms with a maximum aspect ratio of 4: These cold-formed steel framing standards are available as free downloads at www. ASTM C has historically stipulated manufacturing tolerances for cold-formed steel structural framing members.
This chapter contains design, manufacturing quality criteria, and installation requirements for cold-formed steel trusses as previously included in AISI S The other s2120-7 addressed such topics as a code of standard practice, the definition of standard product, and prescriptive design for residential applications.
Connection design is limited to primarily a discussion of screw connections.
The ends of a built-up compression member are connected by a weld having a length not less than the maximum width of the member or by connectors spaced longitudinally not more than 4 diameters apart for a distance equal to 1. This new exception provides for a more economical built-up member, as is often used as a jamb stud or shear wall boundary member.
Therefore AISI extended its standards development activity to support the growing needs of the cold-formed steel framing industry. From tothe AISI Committee on Framing Standards developed nine different framing standards to cover specific aspects of cold-formed steel framing. This computational method is applicable for walls sheathed with steel sheet. The commentary and explanatory language is identified by a vertical black line along the right margin.
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The effective strip method is permitted to be used within the following range of parameters:. Although the AISI Specification had gained acceptance and was in widespread use, there were a number of design issues that were not adequately addressed for this emerging market.
Effective strip method model for steel-sheet sheathing. This newly developed chapter provides minimum requirements for quality control and quality assurance for material control and installation for cold-formed steel light-frame construction. However, rather than add to the complexity of the AISI Specification, it was decided that a new family of s212–07 should be developed.
It outlines the scope, which is for design and installation of cold-formed steel framing of a floor and roof systems, b structural walls, c shear walls, strap braced walls, and diaphragms to resist in-plane lateral loads, and d trusses for load-carrying purposes in buildings.
Beneficial for the design engineer is a new Effective Strip Method that enables the calculation of the nominal in-plane s212–07 wall strength for Type I s21-207 walls Figure 2. This has been an often asked question by framing design engineers. This article focuses on AISI S which applies to cold-formed steel structural members subject to gravity loading, wind loading, w212-07 seismic loading, except when specific seismic detailing is required.