Tech Note W102-26: Introduction to Curtain Wall Design using Cold-Formed Steel
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This Tech Note Updates and Replaces Tech Note W102-21
Summary: A curtain wall can be defined as a non-vertically loaded exterior wall (aside for self-weight) support by the primary structural frame of the building. When it comes to cold-formed steel framing, this definition can encompass a great many possible assemblies and applications. This Technical Note discusses the various structural elements of a curtain wall system, and introduces the subjects of design loads and framing analysis.
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 S100-24: Antiterrorism Design Requirements for Cold-Formed Steel Framing
This Tech Note Updates and Replaces Tech Note S100-24
Summary: Understanding and implementing antiterrorism requirements into cold-formed steel framing (CFS) design can be a daunting task for a design engineer. In recent years, the DoD Unified Facilities Criteria program has developed documents to help walk a designer through the process; however, considerable confusion still exists. CFS can be used throughout the building as exterior and/or interior walls, as well as floor and roof systems. However, the focus of this technical note is blast protection of building envelopes, specifically exterior walls. The applicability of UFC 4-010-01 to the design of the building envelope is discussed, and the static and dynamic design approaches for exterior walls are presented and worked out in a design example.
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 551e: Design Guide: Permanent Bracing of Cold-Formed Steel Trusses
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.

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.

Tech Note G100-23: Using Chapter K of the North American Specification for the Design of CFS Structural Members
This Tech Note Updates and Replaces Tech Note G100-07
Summary: The North American Specification for the Design of Cold-Formed Steel Structural Members is intended for use throughout the U.S., Canada and Mexico and was developed by the American Iron and Steel Institute, Canadian Standards Association, and CANACERO in Mexico. The Specification provides procedures for the design of load bearing cold-formed steel members in buildings and certain other 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.

Tech Note G800-23: ASTM Standards for Cold-Formed Steel
This Tech Note Updates and Replaces Tech Note G800-12
Summary: This Technical Note provides an overview of the principal ASTM standards affecting cold-formed steel framing. These standards are often referenced in building codes and contractual documents, and are available for purchase on the ASTM website.
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 562-22: Powder-Actuated Fasteners in Cold-Formed Steel Construction
This Technical Note updates and replaces Tech Note 562
Summary: Power-actuated fasteners (PAF’s) are industry standard for attachment of cold-formed steel (CFS) steel framing members, usually track, to concrete, CMU or steel structural elements. “Power-actuated” is the broad category used to refer to fasteners which are driven directly through the CFS and into the substrate, using a powder, gas, compressed air or electro-mechanically driven tool. Efficient installation of framing systems is greatly enhanced by the use of PAF’s. For CFS-to-steel applications, the specification AISI S100 addresses all relevant limit states with equations and safety/ resistance factors. For CFS-to-concrete, limited guidance is provided but not all limit states are covered. This technical note will provide design guidance based on AISI S100, as well as installation and good detailing practice.
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 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.

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.
