Codes & Standards - Purchase
Inadequate construction practices and premature deterioration of concrete is not only costly but poses a safety threat to the community at large. CSA Group has created this standard to provide requirements for concrete materials and for the methods of manufacture & testing for all concrete applications -- including, cast-in-place, precast, pre-stressed, architectural, residential and specialty concretes.
CSA A23.4-09 covers concrete pre-cast in manufacturing plants which is shipped off-site, i.e. bridge or large commercial building construction. A sister standard – A23.1-09/A23.2-09 - Concrete Materials and Methods of Concrete Construction/Test Methods and Standard Practices for Concrete – provides the same specifications for residential concrete, which is primarily ready-mixed concrete for new construction, renovations and repair work.
This is the fifth edition of CSA A23.4, Precast concrete — Materials and construction. It supersedes the previous editions, published in 2005, 2000, 1994, and 1978.
This Standard has been revised to include all necessary technical requirements for precast concrete. This Standard refers extensively to CSA A23.1. To make it easier to navigate between the two Standards, Annex D lists the clauses of CSA A23.1 that contain provisions relating to clauses in this Standard. CSA acknowledges that the development of this Standard was made possible, in part, by the financial support of the Canadian Precast/Prestressed Concrete Institute.
This Standard was prepared by the Technical Committee on Precast Concrete, under the jurisdiction of the Strategic Steering Committee on Concrete and Related Products, and has been formally approved by the Technical Committee. It will be submitted to the Standards Council of Canada for approval as a National Standard of Canada.
This Standard specifies requirements for materials and methods for the manufacture, transportation, and installation of architectural, structural, and specialty precast concrete products.
Note: This Standard should be specified for precast concrete elements used in segmental construction.
1.2 Shop drawings
This Standard specifies the requirements, in addition to those specified in CAN/CSA-A23.3, for precast concrete shop drawings.
1.3 Architectural precast concrete
This Standard deals with the structural adequacy and architectural finishes of architectural precast concrete.
Where this Standard states that the content of a clause is required to conform to a referenced Standard and to additional clauses of this Standard and there is a conflict between the referenced Standard and the requirements of this Standard, the requirements of this Standard take precedence.
In CSA Standards, shall is used to express a requirement, i.e., a provision that the user is obliged to satisfy in order to comply with the standard; should is used to express a recommendation or that which is advised but not required; and may is used to express an option or that which is permissible within the limits of the standard.
Notes accompanying clauses do not include requirements or alternative requirements; the purpose of a note accompanying a clause is to separate from the text explanatory or informative material.
Notes to tables and figures are considered part of the table or figure and may be written as requirements.
Annexes are designated normative (mandatory) or informative (non-mandatory) to define their application.