Concrete work

Pages:221-232
25. Concrete work
25.1. General provisions
25.1.1. The construction of heavy reinforced concrete roofs
and other heavy overhead structures should be based on plans
that:
(a) include specifications of the steel and concrete and other
material to be used, including technical methods for safe
placing and handling;
(.5) indicate the type, strength and arrangement of load-bearing
parts; and
(c) provide, if appropriate, calculations of the strength of roofs
or other heavy overhead structures made with prefabricated
parts.
25.1.2. During the construction of heavy reinforced concrete
roofs and other heavy overhead structures, a daily record should
be kept of the progress of the work, including indications of all
data which could affect the curing of the concrete.
25.2. Preparation, pouring and erection of concrete
25.2.1. Workers handling cement and concrete should:
(a) wear close-fitting clothing, gloves, helmets or hard hats,
safety goggles and suitable footwear and, if necessary to
prevent danger, respirators or masks;
(.5) keep as much of the body covered as is practicable;
take all practicable precautions to keep cement and concrete
away from the skin; and
wash frequently and, if necessary, use appropriate cream on
exposed skin.
25.2.2. When work is done with cement, lime and other dusty
materials, or machines for crushing, grinding or sifting building
materials are operated in enclosed premises:
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