scope:

Introduction

The purpose of these Commentaries is to make available to the designer detailed design information that will assist in the use of Part 4 of Division B of the National Building Code of Canada 2010 (NBC). The Commentaries are provided as background information and, in some cases, as suggested approaches to certain design questions, but not as mandatory requirements.

Because the information provided in these Commentaries cannot cover all conditions or types of structures that occur in practice, and also because new information may become available in the future, the designer should try to obtain the latest and most appropriate design information available. For unusual types of structures, specialized information such as theoretical studies, model tests or wind tunnel experiments may be required to provide adequate design values.

Commentaries A, F, G, I, J and K were updated by the groups listed below to reflect technical changes made to Part 4 of the NBC 2010.

Revisions to Commentary A, Limit States Design, were prepared by the Standing Committee on Structural Design, which advises the Canadian Commission on Building and Fire Codes on provisions for all structural design other than earthquake engineering.