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©
Canadian Standards Association
Precast concrete — Materials and construction
November 2009
15 Fabrication and placement of hardware and other
embedded items
15.1 General
Fabrication and placement of hardware and other embedded items shall comply with Clause 6.7 of
CSA A23.1 and
Clauses 15.2
to
15.5
of this Standard.
15.2 Handling of hardware
Care shall be taken during handling and placing of hardware to prevent damage to corrosion protection.
All damage shall be repaired. For galvanized elements, repairs shall be performed in accordance with
ASTM A780.
Notes:
(1)
The exposed metal surfaces of hardware should be adequately protected during storage.
(2)
Additional protective measures for hardware after installation will depend on exposure and on how the hardware is
handled.
15.3 Shop drawings
Specified reinforcement, as shown on the shop drawings, shall not be modified, relocated, or eliminated
to accommodate hardware. If hardware anchors or reinforcing steel cannot be located as shown on the
shop drawings, the revisions shall be reviewed by the manufacturer’s engineer. All revisions shall be
recorded on the drawings for review by the owner.
15.4 Tolerances for placing hardware
Hardware shall be placed in accordance with Article 10.0 of PCI MNL-135.
Notes:
(1)
Immediately after consolidation of the concrete, hardware should be checked for position and, if necessary, realigned.
(2)
The reason for more precise tolerances in the case of slope variations is the difficulty in compensating for such
variations when a connection is made in the field. In the case of other dimensional variations, as covered by
Clause 6.7.3 of CSA A23.1, it is relatively simple to compensate if the design has allowed for sufficiently large plates,
ample clearances, and proper use of shim plates.
15.5 Lifting and handling hardware
Permanent connection hardware shall not be used for handling unless designed and approved by the
manufacturer’s engineer. The connections shall be designed for such additional service to prevent damage
to the connection or impairment of their performance. Any resulting damage to corrosion protection shall
be repaired. In the case of hot-dip galvanized connections, repairs shall be performed in accordance with
ASTM A780.
Notes:
(1)
Lifting devices made of prestressing tendon or wire cable are frequently used. If more than one tendon or wire cable is
required to comply with the design requirements, special provisions should be used to ensure that the load is
distributed evenly between all lifting devices. Proper rigging should be used to distribute the load in accordance with
the design criteria.
(2)
Threaded inserts and lifting devices with exposed threads should be protected.
(3)
Precast elements designed to be demountable should have permanent protected connections to allow for the future
relocation of the elements.
16 Mix proportions
16.1 General
Mix proportioning for precast concrete shall comply with Clause 4.3.1 of CSA A23.1 and
Clauses 16.2
and
16.3
of this Standard.
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.