Tech Note 551e: Design Guide: Permanent Bracing of Cold-Formed Steel Trusses
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Summary: Prefabricated and site fabricated cold-formed steel trusses have proven to be efficient and structurally-sound roof structures. While roof trusses are the major component of the structural roof system, permanent bracing is also required to complete the system and ensure that it performs as designed. In this Tech Note, the basic requirements and design parameters for permanent bracing of cold-formed steel roof systems will be reviewed.
Disclaimer: Designs cited herein are not intended to preclude the use of other materials, assemblies, structures or designs when these other designs demonstrate equivalent performance for the intended use. CFSEI documents are not intended to exclude the use and implementation of any other design or construction technique.
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Tech Note G801-13: ASTM A1003 – No Cause for Rejection
Summary: Building codes and design standards that reference ASTM International (ASTM) A1003 standard for cold-formed steel framing products have the potential to cause confusion and project delays for those who are unfamiliar with the requirements of this new material standard. This Technical Note, first published in 2008, provides a comparison of the requirements of A1003 with the more familiar standards traditionally used for cold-formed steel framing products, and demonstrates that steel ordered or furnished to the old standards should be no cause for rejection. The 2013 revision references a change to the requirements of ASTM A1003 regarding material thickness when ordering or supplying steel sheet.
Disclaimer: Designs cited herein are not intended to preclude the use of other materials, assemblies, structures or designs when these other designs demonstrate equivalent performance for the intended use. CFSEI documents are not intended to exclude the use and implementation of any other design or construction technique.
Tech Note 559: Design Considerations for Flexural and Lateral-Torsional Bracing
Summary: Load bearing cold-formed/light gauge steel (CFS/LGS) framed walls are typically designed for a combination of axial and lateral out-of-plane (flexural) loading. Under this loading condition, common C-section studs may be susceptible to local, torsional, flexural, torsional-flexural, lateral-torsional or distortional buckling. The response performance of the stud depends on a number of parameters most notably how it is supported along its length (including its ends), the relative magnitudes of the applied loads and the distribution of these loads. This Technical Note discusses the behavior of the typical wall stud and provides some practical considerations for design of torsional-flexural and lateral-torsional bracing. Recommendations and considerations suggested in this technical note are done in accordance with acceptable practices and existing design documents.
Disclaimer: Designs cited herein are not intended to preclude the use of other materials, assemblies, structures or designs when these other designs demonstrate equivalent performance for the intended use. CFSEI documents are not intended to exclude the use and implementation of any other design or construction technique.
Tech Note B002-20: How Cold-Formed Steel is Used in Building Construction
Summary: Cold-formed steel framing is used in numerous applications across the building industry. The purpose of this Technical Note is to provide a general overview of common cold-formed steel shapes and various applications in which they are used.
Disclaimer: Designs cited herein are not intended to preclude the use of other materials, assemblies, structures or designs when these other designs demonstrate equivalent performance for the intended use. CFSEI documents are not intended to exclude the use and implementation of any other design or construction technique.
Tech Note B003-20: Introduction to Building Codes
Summary: The International Code Council develops a suite of building codes that are considered nationally to be the model codes for the building industry. Local jurisdictions adopt, and in some cases amend, the codes and they become the law of the jurisdiction for building design and construction. The adopted building codes are intended to provide minimum requirements to provide a safe building environment. Among other requirements, the code dictates the maximum allowable size of a building based on its intended use, materials used in construction, fire resistance rating of structural elements, and the presence of automatic sprinkler systems. The International Building Code establishes all design loads to be applied to the building or structure. The building code also relies on references to other standards and specifications to ensure the provisions reflect the current industry practice. For cold-formed steel framing, the IBC references the American Iron and Steel Institute’s suite of framing standards as the accepted design methods and procedures.
Disclaimer: Designs cited herein are not intended to preclude the use of other materials, assemblies, structures or designs when these other designs demonstrate equivalent performance for the intended use. CFSEI documents are not intended to exclude the use and implementation of any other design or construction technique.
Tech Note B004-20: Introduction to Cold-Formed Steel Framing Standards
Summary: The AISI Committee on Framing Standards was established in 1998 with a mission to eliminate regulatory barriers and increase the reliability and cost competitiveness of cold-formed steel framing in residential and light commercial building construction through improved design and installation standards. This Tech Note summarizes the efforts and work products of the Committee.
Disclaimer: Designs cited herein are not intended to preclude the use of other materials, assemblies, structures or designs when these other designs demonstrate equivalent performance for the intended use. CFSEI documents are not intended to exclude the use and implementation of any other design or construction technique.
Tech Note G105-22: Compression Member Reinforcement
Summary: To modify the capacity of a compression member, e.g. wall stud or truss web, adding a reinforcement may result in a non-prismatic member. This Tech Note provides guidance to evaluate the strength of a non-prismatic compression member.
Disclaimer: Designs cited herein are not intended to preclude the use of other materials, assemblies, structures or designs when these other designs demonstrate equivalent performance for the intended use. CFSEI documents are not intended to exclude the use and implementation of any other design or construction technique.
Tech Note S300-21: Coordinating Cold-Formed with Metal Buildings
Summary: This Technical Note presents a discussion of both the design responsibilities and the need for coordination when integrating field-framed, i.e., stick-built, cold-formed steel (CFS) framing with a metal building system. Important potential coordination topics connection details and design concepts are highlighted.
Disclaimer: Designs cited herein are not intended to preclude the use of other materials, assemblies, structures or designs when these other designs demonstrate equivalent performance for the intended use. CFSEI documents are not intended to exclude the use and implementation of any other design or construction technique.
Tech Note G101-08: Design Aids and Examples for Distortional Buckling
Summary: The objective of this Tech Note is to provide design examples and design aids specific to cold-formed steel framing systems that address the new distortional buckling limit states added to AISI-S100 in the 2007 edition. In addition, a method is provided for including rotational restraint, provided by sheathing to members, in the design calculations for distortional buckling. This method has been proposed for the next edition of AISI-S210 (floors and roofs) and AISI-S211 (walls studs) standards and partially mitigates the reduced capacity in the distortional buckling limit state.
Note: This document was originally published as G100-08, corrected to G101-08 in April 2011.
Disclaimer: Designs cited herein are not intended to preclude the use of other materials, assemblies, structures or designs when these other designs demonstrate equivalent performance for the intended use. CFSEI documents are not intended to exclude the use and implementation of any other design or construction technique.