Automatic Acoustical Smoke Vent Model
Type ACDSH
Standard Features and Benefits
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STC-46 acoustical sound rating
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Thermolatch® II positive hold/release mechanism ensures reliable vent operation when a fire occurs.
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Automatically releases vent covers upon the melting of a UL-listed 165°F (74°C) fusible link.
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The curb-mounted fusible link housing allows the latch to be quickly and easily reset from the roof level.
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Engineered with powerful gas spring operators to open covers in snow and wind conditions
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Gas springs have integral dampers to assure the covers open at a controlled rate
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Fully insulated and gasketed for weather-tightness
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Constructed with corrosion resistant materials to provide many years of trouble free, dependable service
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Available in a number of standard UL listed sizes
Guide Specifications
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Material: Cover and frame are 14 gauge (2 mm) G-90 paint bond galvanized steel.
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Covers: Brakeformed, hollow-metal design with 3" (75 mm) concealed fiberglass insulation, 5" (127mm) beaded, overlapping flange, fully welded at corners, and internally reinforced for 40 psf (195 kg/m2) live load.
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Curb: 12" (305mm) in height with integral capflashing, 3" (75 mm) fiberboard insulation, fully welded at corners, and 5-1/2" (140mm) mounting flange with 7/16" holes (11mm) provided for securing frame to the roof deck.
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Gasket: Extruded PVC gaskets permanently adhered to the underside of the cover and the top of the curb.
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Hinges: Heavy-duty pintle hinges with 3/8" (9 mm) type 316 stainless steel hinge pins.
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Latch: Positive hold/release mechanism controlled by a single UL-listed 165°F (74°C) fusible link with a separate latching point for each cover. Designed to hold the covers closed against a 90 psf (438kg/m2) wind uplift force. Provided with interior and exterior pull release cables to manually open vent covers.
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Operation: When acoustical smoke vent is released, high performance gas springs open covers against a 10 psf (49kg/m2) snow/wind load and lock covers in the open position. Gas springs have integral dampers to assure a controlled rate of cover opening and have a cyclic durability of 50,000 cycles.
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Performance Ratings: STC-46 sound rating. UL-listed. Comply with UL 793 and UL 790 Class A (burning brand test).
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Finish: Alkyd base red oxide primer.
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Hardware: Corrosion-resistant gas springs and hot dip galvanized steel stop cables. All other hardware is zinc plated/chromate sealed.
U.S. Patents 5,927,012 5,960,596 6,347,818
