sizing system and hoses for maintenance work
applications.
Maintenance-gasoline: 223 (kW/0.07 m3/s; 261/0.09;
373/0.19 299 (HP)/150 (CFM); 350/200; 500/400
Maintenance-diesel: 224/0.19; 373/0.28; 522/0.47
300/400; 500/600; 700/1000
Turbo-charged diesel: to 373/0.66 500/1400
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2.13.1
General Requirements for Vehicle Tail Pipe Exhaust System
Provide a hanging [exposed overhead] [disappearing overhead] [disappearing
underfloor] [nondisappearing (plug-in underfloor)] type vehicle tail pipe
exhaust system. Construct and install in accordance with applicable
requirements of NFPA 91.
2.13.2
Ductwork
Construct ducts and miter or stamped fittings with galvanized steel. Duct
sheet metal gages shall conform to Class I in SMACNA Rectangle Duct Const
and SMACNA Rnd Duct Const.
2.13.2.1
Suction Side Ductwork
Construct suction side ductwork with lock groove seam longitudinal joints.
Connect circumferential joints between sections with push-on or bead and
crimp type, secured with a minimum 4 rivets or screws on ducts up to and
including 100 mm 4 inches diameter, and with screws or rivets a minimum 80
mm 3 inches on center on larger sizes of duct. Lap joints in the direction
of air flow. On disappearing overhead systems, assemble roller duct
sections using pop rivets. Solder all joints or construct ductwork
leak-tight as for discharge side ductwork below.
2.13.2.2
Discharge Side Ductwork
Construct ductwork on the discharge side of the fan leak-tight with joints
and seams welded, brazed, or soldered. Provide flanges with suitable
gaskets, where required. Repair damaged galvanizing with galvanizing
repair compound.
2.13.3
Fan
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NOTE: The criteria for special AMCA construction
for protective coating can be further delineated
here or incorporated into referenced paragraph, if
this is the only fan. Specify welded Class II
construction only where required.
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NOTE: See Section 15070, "Mechanical Sound,
Vibration, and Seismic Control," for guidance given
in guide specification technical notes. Definite
requirements should be specified in contract
specification for bidders' information.
SECTION 15801N
Page 33