the unscribed area shall be less than ten (no failure). Thickness of
coating or paint system on the actual equipment shall be identical to that
on the test specimens with respect to materials, conditions of application,
and dry-film thickness.
2.5
FIRE DAMPERS
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NOTE: Use 1 1/2 hour rated damper for up to 2 hour
fire walls. Use 3 hour rated damper only for 3 hour
or 4 hour fire walls.
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Provide [_____] [single leaf] [guillotine] [recessed] [hinged] [type]
[curtain type with interlocking blades] [with frame and operating mechanism
housed out-of-[air] [fume] [vapor] stream,] constructed and rated in
accordance with AMCA 500-D. Furnish dampers for indicated stream flow, to
equal or exceed fire resistance rating of [1 1/2 hours] [3 hours]. Fire
damper shall be rattle-free and shall cause a minimum [5] [10] percent
increase in stream velocity or system static pressure. [For [_____]
system[s], stream exposed materials of construction shall be [_____].]
Provide building penetration collars in accordance with AMCA 500-D [and
NFPA 91], [unless otherwise indicated]. Provide one spare fusible link for
testing of each fire damper operation and one spare fusible link for each
[10] fire dampers, but not less than two.
2.6
MISCELLANEOUS MATERIALS
2.6.1
Filler Metal, Welding
AWS filler metal specification and grade compatible with base materials to
develop full joint strength.
2.6.2
Flashing Materials
[Mill galvanized, phosphatized, steel sheet with minimum spangle,
conforming to ASTM A 653/A 653M, Coating G90, 24 gage minimum thickness.
Mill No. 1 or 2D finished, stainless steel, fully annealed, soft temper,
conforming to ASTM A 167, Type 304, 0.38 mm 0.015 inch minimum thickness.
Mill finished copper, conforming to ASTM B 152/B 152M, minimum 1487 gram
per square meter 16 ounces per square foot.] [As specified in Section [
07600] FLASHING AND SHEET METAL.]
2.6.3
Flexible Connectors
2.6.3.1
General Service
Airtight, fire-retardant, fume and vapor resistant, chloroprene or
chlorosulfonated polyethylene impregnated, woven fibrous glass fabric,
rated for continuous service at 121 degrees C 250 degrees F, conforming to
UL 214, with 678 gram per square meter 20 ounce per square yard weight for
service at 498 Pa 2 inches water gage and under and 1017 gram per sqaure
meter 30 ounce per square yardweight for service over 498 Pa 2 inches water
gage. Provide with or without integral 24 gage mill galvanized sheet metal
connectors.
2.6.3.2
Acoustic Service
Provide as second layer for nonpressure service to 60 degrees C 140 degrees
SECTION 15801N
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