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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The list of these standards, as well as other excellent design guides, are provided. 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.
This new s21-207 includes design provisions for wall systems, floor and roof systems, lateral force-resisting systems, as well as truss and header assemblies. First Name Last Name. This new exception provides for a more economical built-up member, as is often used as a jamb stud or shear wall boundary member. The other standards addressed such topics as a code of standard practice, the definition of standard product, and prescriptive design for residential applications.
AISI Cold-Formed Steel Standards are Offered Free of Charge for Downloading
However, rather than add to the complexity of the AISI Specification, it was decided that a new family of standards should be developed. Powered by WordPress and the Graphene Theme. Additional explanatory language is also provided. Format defines design considerations.
This has been an often asked question by framing design engineers. Beneficial for the design engineer is a new Effective Strip Method that enables the calculation of the nominal in-plane shear wall strength for Type I shear walls Figure 2. Six of these standards addressed the design of structural elements, such as general provisions, wall studs, floor joists, trusses, headers, and shear walls.
This chapter contains design provisions for cold-formed steel framing members and assemblies, as previously included in AISI S, S, S, and S This document is intended to serve only as an educational tool.
Flexural Members Chapter E: 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. From tothe AISI Committee on Framing Standards developed nine different framing standards to cover specific aspects of cold-formed steel framing.
Your message Submit Comment. This article focuses on AISI S which applies to cold-formed steel structural members subject to gravity loading, wind loading, and seismic s212-007, except when specific seismic detailing is required. This limitation has s212-0 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. These cold-formed steel framing standards are available as free downloads at www.
For roof or floor diaphragms with a maximum aspect ratio of 4: The previous design standards limited their application to framing members having a maximum base steel thickness to mils 0. 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.
The commentary and explanatory language is identified by a vertical black line along the right margin. Sheathing and discrete bracing.
Design Documents » Wei-Wen Yu Center for Cold-Formed Steel Structures
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.
Connection design is limited to primarily a discussion of screw connections.
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. The scope was selected to provide coverage of the high volume application of cold-formed steel in light-framed construction.
This computational method is applicable for walls sheathed with steel sheet. However, AISI S now incorporates an exception for a built-up axial load bearing section comprised of two studs oriented back-to-back forming an I-shaped cross-section. Inthe manufacturing tolerance values were extended to the flange width and stiffening lip length.
Print this Page Design Documents. This chapter contains design, manufacturing quality criteria, and installation requirements for cold-formed steel trusses as previously included in AISI S 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. Also, for ease of use, S contains a section reference table between the S provisions and the previous provisions Table 2.
This chapter provides installation requirements previously contained in the various framing standards. Yu, Wiley-Interscience Back to top. But, why would AISI develop six discrete framing standards as opposed to one design manual? ASTM C has historically stipulated manufacturing tolerances for cold-formed steel structural framing members.
These applications include wall, floor and roof framing in a number of building types. It outlines the scope, which is for design and installation of cold-formed s212-007 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.
The chapter also includes:. Section reference table S and previous standard. Permanent link to this article: The document addresses the design for a C-shaped cross section as a flexural member and a compression member. The effective strip method is permitted to be used within the following range of parameters:.
The method assumes a sheathing strip carries the lateral load via tension field action. Therefore AISI extended its standards development activity to support the growing needs of the cold-formed steel framing industry. This appendix contains requirements a212-07 the determination of the rotational stiffness that structural sheathing provides to framing aosi to facilitate the design for distortional buckling.