quick-opening valve shall be arranged for operation from the work side of
the counter.
2.6.4
Glass Washing Sinks
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NOTE: Glass-washing sinks are not required in
enlisted personnel dining facility.
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Backsplashes shall be suitable for mounting the glass washing machine.
Back shall be reinforced to eliminate vibration and noise.
2.7
EXHAUST HOODS OVER COOKING EQUIPMENT
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NOTE: Hood design will be in accordance with NFPA
96, ASHRAE, and the ACGIH Industrial Ventilation
Handbook. Designer will indicate type, size, shape,
make-up air, and detail of hoods and the required
standard cubic meters per second (cubic feet per
minute), meters per second (feet per minute)
(velocity), static pressure, and duct collar size
for exhaust/make-up air on the drawings. Grease
extracting automatic washdown hoods will be
specified for new construction. Filter type hoods
may be used in existing facilities where conditions
prevent the use of grease extractor hoods.
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Hoods and duct work systems shall conform to ACGIH-2092M ACGIH-2092S, NFPA
96, and SMACNA HVAC Duct Const Stds. Hoods shall be U.L. listed per UL 710
and NSF approved. These standards represent only the minimum requirements;
subsequent subsections of this clause may require construction that exceeds
these minimum requirements. Unless otherwise specified, ducts and hoods
shall be secured to building so as to be level and free from vibration
under all conditions of operations.
2.7.1
Exhaust Duct
Exhaust duct for canopy or noncanopy hoods shall be constructed of [1.6 mm
(16 gauge) 16 gauge black iron] [1.3 mm (18 gauge) 18 gauge stainless
steel] and shall have external seams welded continuously, liquid tight.
Duct size shall be based on a minimum air velocity of 7.6 meters/second1500
fpm and maximum of 12.7 meters/second 2500 fpm. Duct shall be continuously
welded, liquid tight, to hood duct collar as required by NFPA 96.
2.7.2
Hood Support
Wall mounted or island type hoods shall be supported from the structure
with stainless steel mounting brackets provided with hoods. Hanger rods
shall be 13 mm 1/2 inch diameter stainless steel, threaded at the bottom
and designed at the top to fit into inserts in building slats above or
shall have hanger attachments fastened to structural steel members. Hanger
rods shall be spaced 1200 mm 48 inches on center, maximum.
2.7.3
Integral Make-up Air System
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SECTION 11400A
Page 26
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