other or against a wall shall be equipped with protective bumpers.]
[Bumpers shall be fabricated from either 1.5 mm 0.059 inches thick
galvanized steel or stainless steel channel or from solid rubber or
rubber-like materials having a durometer A-hardness of 75+ 5.]
2.9.1.8
Gasket
Gasket material shall be either natural or synthetic rubber and conform to
NSF 2. Where frames are used, the panels shall fit together with gaskets
that are designed for 50 percent compression.
2.9.1.9
Alarm System
An alarm system shall be provided
consisting of a controller, pilot and
warning lights, and audible alarm
as specified by the manufacturer. The
controller shall be equipped with
normally-open and normally-closed
contacts for remote monitoring of
the temperature warning alarms and the
power-off conditions.
2.9.2
Floor
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NOTE: Designer will use floorless design where
possible. When refrigerators are provided in
existing buildings or over crawl spaces, floors
shall be prefabricated insulated floor panels.
Designer will note on the drawings that the exterior
panel surfaces of prefabricated assemblies in
contact with concrete will need to be treated to
prevent deterioration caused by corrosion or
chemical reaction of dissimilar materials. Designer
will indicate type and size of units on drawings and
schedule.
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2.9.2.1
Prefabricated Floor Panels
Prefabricated floor panels shall be of the same construction as
wall/ceiling except with 1.9 mm (14 gauge) 14 gauge galvanized skin, sealed
watertight. [One hard-alloy aluminum tread plate, 5 mm 3/16 inch thick,
with all joints caulked, shall be field applied.] [Nonskid floor strips
shall be 100 by 900 mm 4 by 36 inches and shall be field applied at 300 mm
12 inch spacing in all aisles.] Prefabricated floor panels which are [layed
on] [recessed], shall have [sloping interior floor ramps at exterior
entrance doors] [panels flush with surrounding building floor]. Two sets
of erection tools, compatible with fasteners, shall be furnished with each
unit.
2.9.2.2
Floorless Refrigerator Floors
Floorless refrigerator floors shall be flush with the surrounding building
floor. The built-in floor shall be provided with two layers of 50 mm 2 inch
thick polyurethane board insulation with staggered joints set in mastic or
other thickness of insulation as recommended by the manufacturer. In
addition, a watertight seal formed by 0.152 mm 6 mil polyethylene sheets
with all joints lapped 150 mm 6 inches and sealed, shall be provided on the
surface of the subfloor which will support the insulation and the
refrigeration floor. A 6.8 kg 15 pound felt slip sheet shall be provided
over insulation with 150 mm 6 inch lapped joints flashed up the height of
SECTION 11400A
Page 34
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