Tech Note G900-23: Design Methodology for Hole Reinforcement of Cold-Formed Steel Bending Members
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This Tech Note Updates and Replaces Tech Note G900-15
Summary: The AISI S100, North American Specification for the Design of Cold-Formed Steel Structural Members does not provide guidelines for the reinforcement of holes in cold-formed steel members. This Technical Note provides a methodology for engineering a reinforcement solution.
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 T202-20: Thermal Energy Transfer of Cold-Formed Steel Framing
Summary: While the concepts of energy conservation and efficiency are not new, the demand for sustainable building is at an all-time high. Energy efficiency, and more specifically thermal energy transfer in steel stud construction, presents the construction team with a clear opportunity for reduction in thermal bridging. Advanced analysis of building thermal simulation through scientific thermal modeling programs illustrates that the construction team has the ability to significantly reduce thermal transfer. Use of cold-formed steel framing with a reduced thermal bridging area, in combination with increased spacing of the framing system provides, among other benefits, a significant and positive impact on thermal performance.
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 T201-20: Firestops in Head-of-Wall Joints for Cold-Formed Steel Construction
Summary: The selection of fire-resistive joint systems is aided by an abundance of listed options. This same abundance can make it difficult to find the fire-resistive joint system that not only meets project requirements but also the most project-friendly. Firestop manufacturers conduct training programs for installing contractors, architects, building officials, and others who would like to learn more about fire-resistive systems. Specialty firestop contractors can help with understanding project-specific opportunities. Both UL and FM offer certification programs for firestop contractors to help ensure consistency across the industry. Moreover, it is important to note whether a project will require special inspection of firestops systems. For example, 2018 IBC, Section 1705.17, lists requirements for special inspection of firestops in certain high-rise buildings. There are companies that focus on offering special inspection services. For recommendations or further learnings, please contact your firestop provider. The firestop industry is focused on improving life safety in the built environment through improved passive fire protection.
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 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 G802-23: AISI S100 Section A3.2 Other Steels
This Tech Note Updates and Replaces Tech Note G802-13
Summary: AISI S100, North American Specification for the Design of Cold-Formed Steel Structural Members Section A3.1, Applicable Steels, provides a list of pre-qualified steels that can be used without restriction. The Specification also permits steels that are not listed in Section A3.1 to be used without restriction. This Tech note provides specific examples to demonstrate how to implement Section A3.2, Other Steels.
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 W200-23: Header Design
This Tech Note Updates and Replaces Tech Note W200-09
Summary: AISI S240, North American Standard for Cold-Formed Steel Structural Framing provides provisions needed to design headers over door and window openings in buildings. AISI S240 Section B3.3 – Header Design reflects the appropriate design procedures for back-to-back headers, box headers, and Single, Double and Inverted L-headers subject to gravity loads or wind uplift loads. This Technical Note provides additional recommendations and design examples intended to supplement the AISI S240 header provisions.
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 F101-12: Screws for Cold-Formed Steel-To-Wood and Wood-To-Cold-Formed Steel Attachments
Summary: Screws are often used to attach cold-formed steel (CFS) framing to wood members or wood structural panel decking to CFS joists or rafters. The AISI North American Specification for the Design of Cold-Formed Steel Structural Members (AISI S100) provides design equations for screw connection capacity for CFS members. The National Design Specification for Wood Construction (NDS) provides design equations for fastener/connection capacity (nails, wood screws, bolts, etc.) in wood members. The Engineered Wood Association (APA) and the building codes offer several resources for determining the capacity of screw connections attaching wood sheathing. This Tech Note reviews these resources and discusses design and detailing of these fastener connections.
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 B010-21: Introduction to AISI S202, Code of Standard Practice for Cold-Formed Steel Structural Framing
Summary: Understanding the responsibilities of the different parties involved in a cold-formed steel framing project can be confusing. This Technical Note is an introduction to AISI S202, Code of Standard Practice for Cold-Formed Steel Structural Framing published by the American Iron and Steel Institute (AISI).
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 F100-23: Design of Clip Angle Bearing Stiffeners
Summary: Clip angles are commonly used in cold-formed steel constructions to attach floor joists to the rim track. Clip angles can also work as bearing stiffeners to reinforce the web crippling strength of the floor joists at the bearing locations. As the length of the clip angle may significantly influence the floor joist web crippling strength, it is critical to ensure the minimum length of the clip angle in design.
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.