Tech Note B008-20: Basic C-Shaped Wall Stud Behavior
Tech Note B008-20: Basic C-Shaped Wall Stud Behavior

Summary: Although cold-formed steel framing shares some limit states with hot-rolled steel, cold-formed steel framing and specifically C-Shaped studs exhibit unique behaviors when subjected to various loading conditions. This Tech Note gives an overview of those unique behaviors that need to be considered when designing C-Shaped cold-formed steel members.

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 B009-20: Structural Versus Nonstructural Cold-Formed Steel Framing
Tech Note B009-20: Structural Versus Nonstructural Cold-Formed Steel Framing

Summary: This Tech Note defines structural and non-structural cold-formed steel framing.  It lists code definitions that can be used to categorize framing in question.

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 B010-21: Introduction to AISI S202, Code of Standard Practice for Cold-Formed Steel Structural Framing
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.

 

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Tech Note D001- 23: Durability of Cold-Formed Steel Framing Members
Tech Note D001- 23: Durability of Cold-Formed Steel Framing Members

This Tech Note Updates and Replaces Tech Note D001-13

Summary: The purpose of this document is to give engineers, architects, builders and home and commercial building owners a better understanding of how galvanizing (zinc and zinc alloy coatings) provides long-term corrosion protection to cold-formed steel framing members. This document also suggests guidelines for selecting, handling, and using these steels in framing applications.

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 D100-23: Corrosion Protection of Fasteners
Tech Note D100-23: Corrosion Protection of Fasteners

This Tech Note Updates and Replaces Tech Note D100-13

Summary: Moisture, airborne chemicals and pollutants can all combine to reduce the life of ferrous fasteners through corrosion. This Technical Note examines the corrosion process, available fastener finishes, methods of measuring corrosion and the relative durability of fastener finishes.

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 D200-23: Corrosion Protection for Cold-Formed Steel Framing in Coastal Areas
Tech Note D200-23: Corrosion Protection for Cold-Formed Steel Framing in Coastal Areas

This Tech Note Updates and Replaces Tech Note D200-12

Summary: Cold-formed steel framing may be subject to corrosion when exposed to moisture and salt, both of which are prevalent in coastal areas. The 2003 edition of this technical note, based on guidelines published by the Federal Emergency Management Agency (FEMA 1986) for metal connectors used in wood-framed construction, described the cause of accelerated corrosion in buildings located near the ocean and some larger saltwater bays, as well as the variation in the corrosive environments within a typical building. The 2007 update incorporated the results of a corrosion study by Dr. Ian Robertson of the University of Hawaii Department of Civil Engineering, funded by the U.S. Department of Housing and Urban Development (SFA 2006). The influence of terrain and wind direction on corrosion rates was added to the original document. This 2023 update includes revised referenced documents and improved guidance on the proper storage of materials. This technical note outlines available corrosion-resistant materials for cold-formed steel framing members and makes recommendations for buildings at various distances from the ocean and for different exposure conditions within an individual building.

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 F100-23: Design of Clip Angle Bearing Stiffeners
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.

 

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Tech Note F101-12: Screws for Cold-Formed Steel-To-Wood and Wood-To-Cold-Formed Steel Attachments
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.

 

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Tech Note F101-24: Screws for Cold-Formed Steel-To-Wood and Wood-To-Cold-Formed Steel Attachments
Tech Note F101-24: Screws for Cold-Formed Steel-To-Wood and Wood-To-Cold-Formed Steel Attachments

This Technical Note Updates and Replaces CFSEI Tech Note F101-12

Summary: Screws are commonly used to fasten Cold-Formed Steel (CFS) framing to wood members or attach wood structural panel decking to CFS joists or rafters. The AISI S100, North American Specification for the Design of Cold-Formed Steel Structural Members, provides design equations for determining the capacity of screw connections in CFS members. For wood members, the National Design Specification for Wood Construction (NDS) offers design equations for determining the capacity of various fastener connections, including nails, wood screws, bolts, etc. The APA – Engineered Wood Association and building codes provide multiple resources for determining the capacity of screw connections when attaching wood sheathing. This Tech Note reviews these resources and discusses the 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.

 

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Tech Note F102-21: Screw Fastener Selection For Cold-Formed Steel Frame Construction
Tech Note F102-21: Screw Fastener Selection For Cold-Formed Steel Frame Construction

This Technical Note updates and replaces CFSEI Tech Note F102-11

Summary: Specifying the proper fastener is necessary to assure the proper performance of the connections used in cold-formed steel construction. Cold-formed steel connections primarily utilize externally threaded fasteners, so embedment is not the controlling parameter. Instead, the design of the fastener along with the thickness of the steel govern the value of the connection. This Tech Note provides basic information for determining the appropriate screw type for various applications.

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 F104-24: Design of Cold-Formed Steel Bearing Stiffeners
Tech Note F104-24: Design of Cold-Formed Steel Bearing Stiffeners

Summary: Cold-formed steel (CFS) members consist of relatively slender (large width to thickness ratio) web elements, which may experience buckling under concentrated loads. In CFS construction, these loading conditions can occur at interior or end support bearing locations. Thus, one design limit state to check in CFS design is the web crippling capacity of the member. When the web crippling strength is inadequate, a web stiffener can be used as the most common remedy to avoid web crippling due to concentrated loads. Web stiffeners can take multiple forms, including Tech Note F100, Clip Angle Bearing Stiffeners, proprietary clips, C-section or track section profiles. This technical note covers the design of C-section and track section profiles used as web stiffeners.

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 F140-16: Welding Cold-Formed Steel
Tech Note F140-16: Welding Cold-Formed Steel

Summary: In cold-formed steel construction, welding is a viable connection method. Of the various forms of welding, arc welding is most commonly used to join both cold-formed steel members and hardware components. Prefabrication of roof trusses, panelization of walls, and hardware connections are all ideal applications where welding may be the preferred joining method. This Tech Note provides information on the applicable codes, processes, procedures, design considerations, fabrication and inspection.

This Technical Note updates and replaces CFSEI Technical Note F140-10

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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