S6.1-06 + S6.1S1-10 + S6.1S2-11

Preface

This is the third edition of CSA S6.1, Commentary on CAN/CSA-S6-06, Canadian Highway Bridge Design Code. It supersedes the previous editions, published in 2000 under the title Commentary on CAN/CSA-S6-00, Canadian Highway Bridge Design Code and in 1990 under the title Commentary on CSA Standard CAN/CSA-S6-88, Design of Highway Bridges.


Scope

The OHBDC (MTO 1991) was written for application within Ontario. CAN/CSA-S6-88 was generated with interprovincial co-operation for use in the other provinces of Canada and was largely derived from the preceding OHBDC edition. The provinces and CSA then agreed that the successor edition to both codes would be the Code, published by CSA. The Code has been written using the earlier codes as source documents and with the intention of retaining continuity.

The scope of the Code is a little broader than that of the third and last edition of the OHBDC (MTO 1991). Long span bridges and movable bridges are included. In addition to incorporating newer technology, more emphasis is placed on criteria related to seismic design, durability, access for inspection and maintenance.

The Code Scope statement lists types of structures to which the Code is not intended to apply. The list is not exhaustive. The application of the Code to the types of structures listed is not precluded where the Owner or the Authority having jurisdiction over the structure has designated all or part of the Code as being applicable.