(This document is an excerpt from AISI S North American Standard for Cold Formed Steel Framing – Lateral. Design for convenience only, and should be. Documento 8 – AISI S Standard and Commentary – Committee Use (11!27! 07) – Download as PDF File .pdf), Text File .txt) or read online. AISI S/S ().iv Steel Framing Alliance and the Canadian Sheet Steel Building Institute. North American Standard For Cold-Formed Steel Framing .
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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 chapter contains w213-07, manufacturing quality criteria, and installation requirements for cold-formed steel trusses as previously included in AISI S The previous design standards limited their application to framing members having a maximum base steel thickness to mils 0.
The simple reason is, it was easier to develop small single-topic documents versus a more comprehensive multi-topic document. The effective strip method is permitted to be used within e213-07 following range of parameters:.
This chapter contains design provisions for cold-formed steel framing members and assemblies, as previously included in AISI S, S, S, and S These cold-formed steel framing standards are available as free downloads at www. This chapter provides installation requirements previously contained in the various framing standards. 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 computational method is applicable for walls sheathed with steel s123-07.
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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. The discrete braces are limited to not greater than 8 feet 2.
Also, for ease of use, S contains a section reference table between the S provisions and the previous provisions Table 2. The ss213-07 standards addressed such topics as a code of standard practice, the definition of standard product, and prescriptive design for residential applications.
Section reference table S and previous standard.
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This new chapter lists applicable AISI test standards for s2133-07 steel framing members, connections, and systems. This new exception provides for a more economical built-up member, as is often used as a jamb stud or shear wall boundary member. This has been an often asked question by framing design engineers.
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. 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.
ASTM C has historically stipulated manufacturing tolerances for cold-formed steel structural framing members. This new standard includes design provisions for wall systems, floor and roof systems, lateral force-resisting systems, as well as truss and header assemblies. This method provides an alternative approach to determine the shear wall strength, especially for those that are outside the limitations of the tested 2s13-07.
Sheathing and discrete bracing. The chapter also includes:. First Name Last Name.
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. Your message Submit Comment. For curtain wall systems, the standard now permits the use of the sisi combination of s213–07 attached to one side of the wall stud and discrete bracing for the other flange Figure 1. Effective strip method model for steel-sheet sheathing. The truss component structural performance load test and full-scale truss confirmatory test methods, s213-7 included in AISI S, are provided in this appendix.
But, why would AISI develop six discrete framing standards as opposed to one design manual? For roof or s213-077 diaphragms with a maximum aspect ratio of 4: From tothe AISI Committee on Framing Standards developed nine different framing standards to cover specific aspects of cold-formed steel framing.
It outlines the scope, which is for design and installation of cold-formed aidi 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. Format defines design considerations. The ends of a aiai 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.
Leave a Comment Click here to cancel reply. 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.
Six of these standards addressed the design of structural elements, such as general provisions, wall studs, floor joists, trusses, headers, and shear walls.
Inthe manufacturing tolerance values were extended to the xisi width and stiffening lip length. The method assumes a sheathing strip carries the lateral load via tension field action. The exception applies where the built-up section is seated properly in a track, and the top and bottom end bearing qisi 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.