"ACDSH"
Acoustical Fire Vent
For special situations such as theaters and concert halls, FM approved Bilco acoustical fire vents (STC- and 0ITC-37) are manufactured in
all of the labeled steel vent sizes. These vents are designed to guard against noise intrusion and at the same time provide the security of
dependable automatic venting in case of fire. The gasketed and specially insulated upper and lower doors open simultaneously when heat
breaks the fusible link to actuate the Thermolatch positive hold/release mechanisms.
 
SPECIFICATIONS: Type ACDSH. Furnish and install where indicated on the plans, automatic Fire Vent Type ACDSH, size as manufactured
by The Bilco Company. Upper covers shall be 14 gauge (1.9mm) paint bond G-90 galvanized steel with 4" (102mm) beaded flange and
formed reinforcing members welded to support a minimum live load of 40 lb/ft2 (195 kg/m2). Insulation shall be glass fiber, 2" (51 mm) in
thickness, fully covered and protected by a 22 gauge (.8mm) paint bond G-90 galvanized steel cover liner. Lower covers shall be
continuously hinged and shall be 14 gauge (1.9mm) paint bond G-90 galvanized steel, prime painted. Insulation in the lower covers shall be
glass fiber, 2" (51 mm) in thickness, fully covered and protected by a 22 gauge (.8mm) paint bond galvanized steel liner, prime painted. Curb
shall be 14 gauge (1.9mm) paint bond G-90 galvanized, prime painted, 16" (406mm) in height at hinge sides and pitched 5 degrees to a
fixed insulated center channel. Curb shall be formed with a 3-1/2" (89mm) flange with holes for securing to the roof deck and with an integral
metal capflashing of the same gauge material as the curb. Capflashing shall be equipped with the Bilclip™ flashing system, including
stamped tabs and Pak-Rope. Insulation on the exterior of the curb shall be rigid fiberboard 1" (25.4mm) in thickness. All hardware shall be
zinc plated and chromate sealed. Factory finish shall be red oxide primer on steel. Vent shall be completely assembled with a Thermolatch
positive hold/release mechanisms designed to hold the covers closed against a wind uplift of 30 lb/ft2 (146 kg/m2) without overstressing the
fusible link. Compression spring operators enclosed in telescopic tubes shall be provided to open the upward opening covers to the vertical
position where they will lock automatically. A mechanically retained, continuous thermoplastic rubber gasket, heavy duty shock absorbers,
and pull handles for inside and outside operation. Both upper and lower pairs of covers shall be controlled by a single 165 degrees F (74
degrees C) UL Listed fusible link located on the underside of the lower covers. Complete vent assembly shall carry an STC-45 and OITC-37
sound rating and shall be labeled FM Approved. Installation shall be in accordance with manufacturer's instructions. Manufacturer shall
guarantee against defects in material or workmanship for a period of five years. Contractor shall test for proper operation after installation by
fusing the links and replacement fusible links shall be furnished with the vent. |
