CHANNEL SLABS SPECIFICATIONS
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SCOPE OF WORK:
The work consists of furnishing all materials, labor and equipment
necessary to install Channel Slabs as shown on the drawings and in
accordance with the following specifications.
MATERIALS:
The slabs shall be MidCon lightweight precast concrete channel slabs
manufactured by MidCon Products, Inc., Hortonville, Wisconsin. Slabs shall
be composed of an approved brand of Portland cement and the highest grade
lightweight aggregate, accurately graded and thoroughly mixed and vibrated
to obtain the greatest possible density. All lightweight concrete shall have minimum compressive
strength of 5000 psi in 28 days. Each leg shall be reinforced with
one deformed bar accurately centered so as to have at least one-half inch
of impervious concrete on all sides. The web of the slab is to be
reinforced with a sheet of galvanized welded wire mesh accurately
placed. When specified, heavyweight sand and gravel concrete is
available. Rebar can be galvanized or epoxy coated as required.
SHOP DRAWINGS:
Shop drawings based on the structural layout shall be submitted by the
slab manufacturer for approval before proceeding with the manufacture of
the slabs.
INSTALLATION:
The installation of the slabs shall be performed in a workmanlike manner and
in accordance with the manufacturer’s recommendations. Panels should be
unloaded, stored, hoisted and handled on edge. Bundles should be handled
with nylon slings. Lifting should be done by the method of cradling, not
choking. All joints between the slabs shall be cemented on the upper side
with an approved brand of asphaltic cement and the finished deck shall
present a smooth finish ready for the application of roofing material.
Slabs shall be anchored on alternate corners to the supports with
galvanized clips furnished by the manufacturer.
RELATED WORK OF OTHER SECTIONS:
Bearing of slabs on supporting members shall be at least 2”. Cants,
curbs, and saddles shall be provided by others. Any and all bearing steel
shall be provide by others (i.e. roof deck, opening framing, etc.).
Protection of joint against damage until roofing is applied shall be
provided by others. Bearing surfaces of supporting members shall be kept
free and clear of bolts, rivets, welds bridging and any other obstructions
that would interfere with proper seating of precast slabs. Built-up
roofing may be applied using as asphalt primer as per roofing
specifications for precast concrete deck.
NOTES:
No broken slabs are to be installed and all slabs shall be straight, true
and as near perfect as good workmanship permits.
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