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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Sheathing and discrete bracing. This article focuses on AISI S which applies to cold-formed steel structural members subject to gravity loading, wind loading, and seismic loading, except when specific seismic detailing is required.
This new chapter lists applicable AISI test standards for cold-formed steel framing members, connections, and systems.
This chapter contains design, manufacturing quality criteria, and installation requirements for cold-formed steel trusses as previously included in Aiis S Format defines design considerations. For curtain wall systems, s21-07 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.
Print this Page Design Documents. 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. Six of these standards addressed the design of structural elements, such as general provisions, wall studs, floor joists, trusses, headers, and shear walls. Section reference table S and previous standard.
Therefore AISI extended its standards development activity to support the growing needs of the cold-formed steel framing industry. This has been an often asked question by framing design engineers.
AISI Cold-Formed Steel Standards are Offered Free of Charge for Downloading
The other standards addressed such topics as a code of standard practice, the definition of standard product, and prescriptive design for residential applications. This chapter provides installation requirements previously contained in the various framing standards. The discrete braces are limited to not greater than 8 feet 2.
This method provides an alternative approach to determine the shear wall strength, especially for those that are outside the limitations of the tested systems. 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. Connection design is limited to primarily a discussion of screw connections.
These cold-formed steel framing standards are available as free downloads at www.
Also, for ease of use, S contains a section reference table between the S provisions and the previous provisions Table 2. The document addresses the design for a C-shaped cross section as a flexural member and a compression member.
This computational method is applicable for walls sheathed with steel sheet. But, why would AISI develop six discrete framing standards as opposed to one design manual? Your message Submit Comment. Permanent link to this article: ASTM C has historically stipulated manufacturing tolerances for cold-formed steel structural framing aisk.
The chapter also includes:.
The use of ASTM E results in higher nominal aiis strength values as compared with the cantilever test method historically used for steel deck diaphragms. Yu, Wiley-Interscience Back to top. This appendix contains requirements for the determination of a212-07 rotational stiffness that structural sheathing provides to framing members to facilitate the design for distortional buckling.
Leave a Comment Click here to cancel reply. However, rather than add to the complexity of the AISI Specification, it was decided that a new family of standards should be developed.
From tothe AISI Committee on Framing Standards developed nine different framing standards to cover specific aspects of cold-formed steel framing. The effective strip method is permitted to be used within the following range of parameters:. First Name Last Name.
Additional explanatory language is also provided. This new standard includes design provisions for wall systems, floor and roof systems, lateral force-resisting systems, as well as truss and header assemblies. Flexural Members Chapter E: The simple reason is, it was easier to develop small single-topic documents versus a more comprehensive multi-topic document.
This new exception provides for a more economical built-up member, as is often used as a jamb stud or shear wall boundary member. For roof or floor diaphragms with a maximum aspect ratio of 4: The truss component structural performance load test and full-scale truss confirmatory test methods, previously included in AISI S, are provided in this appendix.
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 previous design standards limited their application to framing members having a maximum base steel thickness to mils 0.
The commentary and explanatory language is identified by a vertical black line along the right margin. 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. The list of these standards, as well as other excellent design guides, are provided.
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. 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. These applications include wall, floor and roof framing in a number of building types. Powered by WordPress and the Graphene Theme.
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.
This document is intended to serve only as an educational tool. The scope was selected to provide coverage of the high volume application of cold-formed steel in light-framed construction. 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.