Although"Steel" may conjure up images of a heavy, cumbersome material forconstruction, steel studs and joists from coated sheet steel products are justthe opposite. Cold-formed sheet steel is an easy to handle, economical,non-combustible, high quality alternative to more traditional framing materials.Steel framing offers a strong, accurate, dimensionally stable and durableframing system. Lightweight steel framing will appeal to any one interested inbuilding construction.
CSSBI 61-2018: Manufacturer Certification Requirements for Cold Formed Steel Framing Members
These requirements are part of a third-party Certification Program developed by the Canadian Sheet Steel Building Institute (CSSBI) for non-structural and structural cold formed steel framing members.
Under the CSSBI Certification Program, a participating Manufacturer certifies that the designated structural and non-structural cold formed steel (CFS) framing members it produces meets or exceeds the ASTM International (ASTM), Canadian Standards Association (CSA) and American Iron and Steel Institute (AISI) standard requirements listed in this program.
The Manufacturer’s Product certification is validated by a third-party review of the Manufacturer’s Product and production practices, appropriate testing and inspection and applies to Products manufactured for sale in Canada that fall within the range of standard sizes specified by the CSSBI.
This manual (232 pages) was prepared to assist the practicing engineer todesign Lightweight Steel Framing (LSF) systems, and was written with a focus onthe fundamental principles of cold formed steel design as they relate to LSFconstruction. It shows how to use the LSF manufacturer's product literaturewhen executing the design of building systems. By following the examplesprovided, the engineer will gain an understanding of the design process forLSF. This 2nd edition has been updated to meet the requirements of the 2005National Building Code of Canada and CSA-S136-01 (with 2004 supplement)Specification for the Design of Cold-Formed Steel Structural Members.
This publication was written to assist practicing Architects with theselection, design and detailing of wall and floor systems incorporatinglightweight steel framing (LSF) members for low rise commercial and medium andhigh rise residential applications.
Steel Stud Brick Veneer Design Guide
This guide has been prepared to assist practicing structural engineers andarchitects to design steel stud brick veneer systems for commercial and highrise residential buildings. Low-rise residential buildings are excluded becausethey generally have less exposure to environmental and structural loads.
CSSBI 58-11 provides design criteria, including dimensions, material specificationand load tables for cold formed steel framing components intended for use inbuilding structures. These tables have been calculated in accordance with therequirements of the 2010 National Building Code of Canada and CSA-S136-0 (withsupplement 2) Specification for the Design of Cold-Formed Steel StructuralMembers.
AISI Design Standards
The American Iron andSteel Institute represents the North American steelindustry and is an ANSI accredited standards writing organization. AISI has twocommittees working on developing design documents for the sheet steel industry.The Committee on Specifications (COS) is responsible for AISI S100 NorthAmerican Specification for the Design of Cold-Formed Steel Structural Members.This same document is published for use in Canada as CSA-S136 by the Canadian Standards Association. The other group is the Committee on Framing Standards (COFS) whodevelop design standards that are more for structural systems incorporatingcold-formed steel framing members. Many of the COFS standards have been adoptedfor use in Canada by reference in CSA-S136.
When designing any type of structure, considering safety for the occupants, surrounding structures, the general public and fire services should be the number one priority.
In some provinces in Canada, work has been carried out or is in the process of being implemented to amend the building codes to allow for buildings of greater heights to be constructed from combustible material, such as wood frame construction. From the standpoint of safety, the CSSBI opposes these changes and calls on policy and decision makers to fully consider the ramifications of allowing greater use of combustible construction.
Steel is a non-combustible material and will not add fuel to a building fire. As such, Lightweight Steel Framing is permitted in a greater number of occupancies with less floor area restrictions and sprinkler system requirements compared to combustible construction according to the National Building Code of Canada. Some insurance underwriters may recognize the benefit of non-combustibility in reduced premiums. Many floor and wall assemblies made from Lightweight Steel Framing have been tested and several additional designs have achieved significant fire ratings.
Fire Performance and Acoustic Ratings
The design ofbuildings often requires that the assemblies have minimum fire endurance orsound attenuation properties. The Canadian Steel Construction Council and theSteel Framing Alliance have published a compilation document on fire andacoustic ratings titled Guide to Fire & Acoustic Data for Steel Floor and Wall Assemblies.
The Canadian SteelConstruction Council has also developed the following Fire Protection Bulletinspertaining to cold-formed steel.
There are also twoULC listings for fire resistance ratings of generic LSF floor assemblies:
LSF non-combustible floorassembly (BXUVC.I523)
LSF combustible floorassembly (BXUVC.M511)
In addition toULC, there are a large number of UL listings for cold-formed steel assemblies.UL has recently ruled that applications of UL listings in Canada can be appliedwith a Load Restricted Factor of one (i.e. no load reduction). This means thatthe whole range of UL listings can be more readily used in Canada. For moreinformation, go to www.ul.com and search for BXUV7.GuideInfo in their onlinecertifications directory.