CSA A23.4 Clause 4: Categories, prequalification, design basis, and project samples and reviews
In this Standard, precast concrete products are divided into the following five categories and each category is divided into subcategories. Manufacturers may be prequalified in any or all of the product group classifications
AT - Architectural Trim Units
A1 - Architectural Products
B1 - Precast Bridge Products
B2 - Prestressed Miscellaneous Bridge Products
B3 - Prestressed Straight Strand Bridge Members
B4 - Prestressed Deflected Strand Bridge Members
BA1, BA2, BA3, BA4 - Bridge Products with an Architectural Finish
C1 - Precast Concrete Products
C2 Prestressed Hollow Core and Repetitive Products
C3 - Prestressed Straight Strand Structural Members
C4 - Prestressed Deflected Strand Structural
CA1, CA2, CA3, CA4 - Commercial Products with an Architectural Finish
D1 - Standard Precast Concrete Drainage Products
Group A (Architectural Products)
Group A shall include products that are decorative and establish the aesthetic character of a structure. These products shall be produced in accordance with the requirements of this Standard. Group A is divided into two categories:
Note: Group A does not include structural products that exhibit a high degree of finish or texture, including unique colouration. Such products are included in Groups B and C.
Group B (Bridge Products) and Group BA (Bridge Products with Architectural Finishes)
Both Group B and Group BA products shall be produced in accordance with the requirements of this Standard.
Group B is divided into four categories:
Group BA products shall be produced with the additional requirements for architectural finishes. Group BA is divided into the same four categories as Group B and are designated Categories BA1, BA2, BA3, and BA4. The category descriptions are identical with the category descriptions for Group B except that the manufacturer shall have the capability to apply architectural finishes in accordance with the provisions of this Standard. Prequalification in each BA category includes the preceding BA categories and supersedes the equivalent Group B category.
Group C (Commercial [Structural] Products) and Group CA (Commercial [Structural] Products w/ Architectural Finishes)
Groups C and CA shall include structural and non-structural elements of buildings and other structures, excluding bridges. These products shall be produced in accordance with the requirements of this Standard.
Group C is divided into four categories:
Group CA products shall be produced with the additional requirements for architectural finishes. Group CA is divided into the same four categories as Group C and are designated as Categories CA1, CA2, CA3, and CA4. The category descriptions are identical with the category description in Group C, except that the manufacturer must have demonstrated the capability to apply architectural finishes in accordance with the provisions of this Standard. Prequalification in each CA category includes the preceding CA categories and supersedes the equivalent Group C category.
Group D (Drainage Products)
Group D products shall include reinforced, non-prestressed concrete structural elements with a primary function of drainage, and their related components. Group D products are produced in accordance with the standard requirements of CSA Standard A23.4.
Products in Group D1 are box units with span greater than 3m, Open footing (3-sided) precast units with flat top slab or arch top - all sizes, Precast components for culverts such as wingwalls, retaining walls, headwalls, parapet walls, strip footings, pile caps, load distribution slabs, etc., rectangular manholes and chambers - all sizes.
Group S (standard products)
Group S products shall include plain or reinforced concrete elements, without architectural finishes that are not included in Groups A, B, BA, C, or CA and are required to be manufactured in accordance with the provisions of this Standard. Products in Group S are often manufactured for a particular application in custom built forms on-demand or kept in inventory.
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