drawings shall be accompanied by setting details, design
calculations showing that the roof decking installation meets
material and design requirements, a descriptive list of materials,
and the manufacturer's current printed installation instructions.
1.3
GENERAL REQUIREMENTS
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NOTE: Because there is a limited number of
manufacturers of these units, there are no national
standards governing the design or manufacture of
these units. Designer should consult manufacturers'
literature for additional information.
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Roof decking units shall be factory-produced items of a firm specializing
in precast roof decking. Design of the roof decking shall be for the load
conditions and spans indicated and any additional load imposed by openings;
work of other trades; and all loading and restraining conditions from
fabrication, handling, and erection. Deflection shall not exceed L/240 of
span.
1.4
HANDLING AND STORAGE
Precast units shall be stored off the ground and protected from weather,
marring, damage, or overload. Adequate ventilation shall be provided to
prevent condensation. Temporary plank walkways or platforms shall be
provided for distributing the weight of materials that are required to be
placed upon or transported over the roof decking.
PART 2
PRODUCTS
2.1
DECK UNITS
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NOTE: Type of units specified will be limited by
design requirements. Thickness and other
dimensions, if essential to the design, will be
indicated. Cement-fiber deck units are available
with foam insulation attached. If roof is to be
insulated, the use of these units should be
investigated.
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Fabrication of roof deck units shall be under plant controlled conditions.
Openings for mechanical and utility systems and for architectural purposes
shall be provided as indicated. Special shapes shall be fabricated as
indicated or required. Surfaces to receive subsequent application shall be
suitable for the purpose intended and free of any coatings that would
interfere with adhesion or bond. Surfaces showing as exposed ceilings
shall be white as manufactured or factory-primed painted to provide a light
reflection of 60 percent.
2.1.1
Concrete Decking
Concrete deck units shall be fabricated of portland cement and aggregate,
reinforced to resist the loads specified. Metal edge members, if furnished
with units, shall be galvanized or galvanized and factory painted.
Nailable concrete slabs shall be capable of accepting roofing nails without
SECTION 03414A
Page 4
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