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A23.4-09
©
Canadian Standards Association
November 2009
10.3.3 Joint materials
Materials for joints between precast concrete elements shall comply with CAN/CGSB-19.13 or
CAN/CGSB-19.24, unless other standards are specified by the owner.
Note:
See PCI MNL-122.
10.3.4 Weather-sealing materials
If weather-sealing materials are used, they shall be as specified or reviewed by the owner.
Note:
See PCI MNL-122.
10.3.5 Insulation for sandwich wall panels
The owner shall specify the insulation material or the insulating properties (required R value) for sandwich
wall panels. Plastic foam insulation shall have a flame spread rating of less than 500.
Note:
Properties such as insulation value, vapour transmission, and volume stability under service conditions should be
documented and this documentation should be available from the supplier.
10.3.6 Manufacturing accessories
Form ties, inserts, bracing, spacers, and similar accessories for production of precast concrete elements
shall be adequate for their intended use and shall not be detrimental to the finished product.
10.3.7 Other materials
Other materials used in the manufacture of precast concrete shall be documented. Such documentation
shall be available at the plant.
11 Storage of materials
11.1 General
Materials for use in precast concrete shall be stored in accordance with Clause 6.3 of CSA A23.1 and
Clause 11.2
of this Standard.
11.2 Hardware materials
Hardware materials shall be
(a) stored according to type, grade, and size;
(b) handled and stored in a manner that avoids distortion; and
(c) kept clean.
12 Tolerances
12.1 General
12.1.1 Basic requirements
The maximum variations specified in
Clauses 12.2
to
12.5
shall apply to finished precast concrete work
and the installation of such work. The tolerances for precast concrete work shall comply with
Clause 12
unless otherwise specified by the owner.
12.1.2 Tolerances not specified elsewhere
For situations in which the maximum variation is not specified in
Clauses 12.2
to
12.5
, the maximum
allowable dimensional variation shall be 1:800 or ±5 mm, whichever is greater.
Notes:
(1)
See Annex C of CSA A23.1 for tolerance-related definitions, principles, and preferred sizes.
Licensed for/Autorisé à Jed Friesen Sold by/vendu par CSA on/le June/18/2015.
~Single user license only. Storage, distribution or use on network prohibited. Permis d'utilisateur simple seulement.
Le stockage, la distribution ou l'utilisation sur le réseau est interdit.