GENERAL: The air horn shall be B&B Roadway, LLC, Model AHR-2 (dual projectors) [AHR-1 (single projector)] (888) 560-2060, or an approved equal meeting all specifications defined herein.
APPLICATIONS: The air horn shall be used as an aural signal to draw attention to operation of the bridge.
PROJECTOR(S): The projectors [projector] shall be of stainless steel, approximately 16” (392mm) in overall length each, and shall feature a diaphragm designed for high pressure operation and low air consumption. The projectors [projector] shall be capable of producing a tone between 260 and 300 Hz with a decibel rating of 120db at 3 meters (10 feet). Tone and volume shall be field adjustable.
COMPRESSOR UNIT: Compressor motor shall be 1.5 hp, 120V, 60Hz, equipped with pre-lubricated and sealed ball bearings. Motor shall operate efficiently over a wide temperature range. Compressor shall be piston type, direct-drive and oil-less. Unit shall use a pressurized reservoir to ensure rapid and consistent response.
MOUNTING: The standard air horn assembly shall be designed for horizontal mounting, remote from the compressor unit. Air horn assembly shall be suitable for outdoor mounting. The compressor unit shall be mounted inside the control house or other weatherproof shelter.
FIELD CONNECTIONS: The electrical contractor shall provide an on-off switch at the control station to provide power to the compressor unit. The electrical contractor shall also provide a pushbutton or similar control device at the control station to control the solenoid valve on the remote projector assembly to regulate sounding of the horns. The contractor shall provide clamps and one length of ¼” tubing, minimum 200 pound rating, to connect from the port at the compressor unit to the port at the solenoid valve on the remote projector assembly. Tubing shall be trimmed to fit on site with no excess length or loops.
ESTIMATED SHIPPING WEIGHT: 70 pounds
