AISI S213 PDF

Six of these standards addressed the design of structural elements, such as general provisions, wall studs, floor joists, trusses, headers, and shear walls. The other standards addressed such topics as a code of standard practice, the definition of standard product, and prescriptive design for residential applications. But, why would AISI develop six discrete framing standards as opposed to one design manual? This has been an often asked question by framing design engineers.

Author:Miktilar Nazragore
Country:El Salvador
Language:English (Spanish)
Genre:Politics
Published (Last):6 October 2008
Pages:332
PDF File Size:14.84 Mb
ePub File Size:2.62 Mb
ISBN:375-3-62496-259-3
Downloads:64422
Price:Free* [*Free Regsitration Required]
Uploader:Kikree



Six of these standards addressed the design of structural elements, such as general provisions, wall studs, floor joists, trusses, headers, and shear walls. The other standards addressed such topics as a code of standard practice, the definition of standard product, and prescriptive design for residential applications. But, why would AISI develop six discrete framing standards as opposed to one design manual?

This has been an often asked question by framing design engineers. The simple reason is, it was easier to develop small single-topic documents versus a more comprehensive multi-topic document. 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 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.

These cold-formed steel framing standards are available as free downloads at www. Table 1. Format defines design considerations. Table 2. Section reference table S and previous standard. Also, for ease of use, S contains a section reference table between the S provisions and the previous provisions Table 2. 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.

The chapter also includes: Definitions for terms used in the standard List of materials applicable to the framing members Corrosion protection requirements Framing products Reference documents The previous design standards limited their application to framing members having a maximum base steel thickness to mils 0.

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. ASTM C has historically stipulated manufacturing tolerances for cold-formed steel structural framing members. In , the manufacturing tolerance values were extended to the flange width and stiffening lip length. Figure 1.

Sheathing and discrete bracing. 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 discrete braces are limited to not greater than 8 feet 2. 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.

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 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 , framed with cold-formed steel and covered with non-steel sheathings, the in-plane nominal shear strength can be determined by tests in accordance with ASTM E 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.

Figure 2. Effective strip method model for steel-sheet sheathing. 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. The method assumes a sheathing strip carries the lateral load via tension field action. This computational method is applicable for walls sheathed with steel sheet.

This method provides an alternative approach to determine the shear wall strength, especially for those that are outside the limitations of the tested systems. The effective strip method is permitted to be used within the following range of parameters: a Designation thickness of stud, track, and stud blocking: 33 mils 0. Chapter C, Installation This chapter provides installation requirements previously contained in the various framing standards.

Chapter D, Quality Control, and Quality Assurance 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.

Chapter E, Trusses This chapter contains design, manufacturing quality criteria, and installation requirements for cold-formed steel trusses as previously included in AISI S Chapter F, Testing This new chapter lists applicable AISI test standards for cold-formed steel framing members, connections, and systems.

Appendix 1, Continuously Braced Design for Distortional Buckling Resistance 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.

Appendix 2, Test Methods for Truss Components and Assemblies The truss component structural performance load test and full-scale truss confirmatory test methods, previously included in AISI S, are provided in this appendix.

24CXX DATASHEET PDF

Tag: cold-formed steel framing

Zujar Effective strip method model for steel-sheet sheathing. This chapter contains design, manufacturing quality criteria, and installation requirements for cold-formed steel trusses as previously included in AISI S For roof or floor diaphragms with a maximum aspect ratio of 4: 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. The chapter also includes:. This has been an often asked question by framing design engineers. From tothe AISI Committee on Framing Standards developed nine different framing standards to cover specific aspects of cold-formed steel framing. Inthe manufacturing tolerance values were extended to the flange width and stiffening lip length. This new standard includes design provisions for wall systems, floor and roof systems, lateral force-resisting systems, as well as truss and header assemblies.

JOHN URWIN THE SIXTEEN PDF

AISI S210-07 - Cold-Formed Steel Framing - Floor and Roof System Design

The amplified seismic load is defined as the load determined using the ASCE 7 seismic load combinations with the overstrength factor, Wo, which may be taken as 2. Typically, the maximum the system can deliver to the uplift anchorage or chord studs is taken as the forces determined using the nominal shear strength of the shear wall assembly tabulated in the seismic shear wall table in S multiplied by 1. See the Structure magazine article that discusses the design of CFS framed lateral force-resisting systems. Continuous Rod Tie-Down Systems Light-framed CFS over three stories often use continuous rod tie-down systems rather than cold-formed steel hold-downs to resist shear wall overturning forces as they offer increased load capacity. Continuous Rod Tie-Down System Resisting Shear Wall Overturning Forces Continuous rod tie-down systems are designed not only for strength, but also checked to ensure they do not deflect too much to cause the top of shear wall drift to exceed the code limit or to exceed the 0. Take-up devices are used in CFS framed structures to take-up construction and settlement gaps that may occur. In addition, coordination is important in using continuous rod tie-down systems in CFS structures because the walls are often prefabricated offsite.

GRACIA Y DEVOCION HIMNARIO PDF

.

APPLESOFT BASIC MANUAL PDF

.

Related Articles