Tech Note L200-09: Roof Framing Anchorage Forces: MWFRS or C&C
Tech Note L200-09: Roof Framing Anchorage Forces: MWFRS or C&C

Summary: This Technical Note defines the two levels of force and discusses the effects of using Component and Cladding (C&C) loads versus Main Wind Force Resisting System (MWFRS) calculated uplift loads. Design examples are provided to indicate the difference in roof-to-wall anchorage force for either type of load. Mainstream reference standards and quotes from field experts are cited when discussing the appropriate levels for calculating the uplift forces.

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 L202-24: Diaphragm Design with Pneumatically Driven Pins
Tech Note L202-24: Diaphragm Design with Pneumatically Driven Pins

This Tech Note Updates and Replaces Tech Note L202-12

Summary: Wood based panels for shear walls and horizontal diaphragms have traditionally been attached to cold-formed steel framing using self-drilling, tapping screws. With the introduction of pneumatic nailing systems, wood-based panels can now be fastened to steel in a manner similar to which panels have been nailed to wood framing in the past. Information on specifications, selection, and field inspection of pneumatic drive pins is contained in Technical Note F300-23, Pneumatically Driven Pins For Wood Based Panel Attachment. This Technical Note contains procedures for the design of floor and roof diaphragms over cold-formed steel framing using pneumatically driven pins.

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 L300-23: Design of End Posts for Diaphragm Shear Walls: A Perspective
Tech Note L300-23: Design of End Posts for Diaphragm Shear Walls: A Perspective

This Tech Note Updates and Replaces Tech Note L300-09

Summary: This Tech Note provides a rational engineering analysis that may replace assumptions that are commonly used and that may be overly conservative. The content of this Tech Note is based upon information in engineering literature, in particular Timoshenko & Gere, Theory of Elastic Stability and upon engineering judgment.

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
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.

 

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Tech Note S200-20: Design of Cold-Formed Steel Systems for Raised Platforms, Stages and Theater Seating
Tech Note S200-20: Design of Cold-Formed Steel Systems for Raised Platforms, Stages and Theater Seating

Summary: It is common for cold-formed steel (CFS) to be used in the construction of raised platforms, stages, and theater seating. It is the intent of the Technical Note to provide an overview of considerations to address when designing such framing, along with some design examples.

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 S300-21: Coordinating Cold-Formed with Metal Buildings
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.

 

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Tech Note T001-09: Suggested Cost-Effective Cold-Formed Steel Fire and Acoustic-Rated Wall and Floor/Ceiling Assemblies for Multi-Unit Structures
Tech Note T001-09: Suggested Cost-Effective Cold-Formed Steel Fire and Acoustic-Rated Wall and Floor/Ceiling Assemblies for Multi-Unit Structures

Summary: This Technical Note addresses some of the most common types of assemblies used with multi-unit construction. Although not all-inclusive, the rated assemblies contained herein are included to help the designer, specifier, and builder achieve cost-effective construction with cold-formed steel  framing. Additional references and methodologies are included to allow specifiers or inspectors who want a more in-depth treatment of the subject or additional information on a particular assembly to easily find this information.

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 T100-12: Fire Assemblies of Cold-Formed Steel Construction
Tech Note T100-12: Fire Assemblies of Cold-Formed Steel Construction

Summary: Cold-formed steel has been widely used in commercial buildings, especially in non-load bearing (partitions) and curtain wall applications. Cold-formed steel sections are increasingly used as primary structural members, such as beams and columns, or as load-bearing walls or partitions in commercial and residential construction. In most cases, these members are required to be fire resistant where they are part of a compartment’s wall or floor, or where they support other floors. The purpose of this Tech Note is to provide the user with a comprehensive list of resources summarizing available tested fire rated steel assemblies, building code requirements, test methods and applicable
references.

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 T201-20: Firestops in Head-of-Wall Joints for Cold-Formed Steel Construction
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.

 

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Tech Note T202-20: Thermal Energy Transfer of Cold-Formed Steel Framing
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.

 

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Tech Note W100-23: Single Slip Track Design
Tech Note W100-23: Single Slip Track Design

This Tech Note Updates and Replaces Tech Note W100-08a

Summary: The AISI S240, North American Standard for Cold-Formed Steel Structural Framing provides a design methodology for wall framing members installed in a deflection track at a head-of-wall condition. There had been previous methods for this analysis; most notably that permitted by the U. S. Army Corps of Engineers Technical Letter 1110-3-439, and the SSMA Technical Notes on Single- and Double- Slip Track Design. This document covers the most common types of slip track connections, how to handle general and specific issues with slip track construction and design, provides a design example, as well as tabulated information on allowable slip track loads.

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 W101-23: Common Design Issues for Deflection Track
Tech Note W101-23: Common Design Issues for Deflection Track

This Tech Note Updates and Replaces Tech Note W101-09

Summary: When cold-formed steel studs are used on exterior walls between spandrel beams or floor slabs to create the exterior envelope of the building, a deflection track is often required at the top of the wall to allow for the roof or floor above to deflect without transferring axial load to the studs. This Technical Note explores two methods for deflection track usage. Additional design guidance is provided in CFSEI Tech Note W100, Single Slip Track.

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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