VT-6802HDTR

GENERAL: The resistance barrier shall be Model VT-6802HDTR, as manufactured by B&B Roadway, (888) 560-2060.
The barrier shall be crash tested in accordance with the Manual for Assessing Safety Hardware (MASH) Test Level 2 (TL-2) and shall be capable of stopping a 5,000 lb vehicle traveling at 44 mph impacting the arm at 90 degrees.

APPLICATIONS: The barrier shall be designed for use as a penetration resistance barrier. The barrier shall be explicitly designed for traffic control on movable bridges, as required by AASHTO’s current standard specifications for movable highway bridges, and shall be suitable for similar applications such as railway crossings, Toll lanes, reversible lanes or any application involving traffic lane management.

HOUSING: The operating mechanism and main control components shall be contained in a weatherproof housing. The housing shall be constructed of .375” (9.5 mm) carbon steel, hot dip galvanized after fabrication. Exterior surfaces shall be painted aluminum. All external fasteners shall be corrosion resistant. Arm shaft openings shall incorporate O-ring seals.

OPERATING MECHANISM: The barrier arm shall pivot in the vertical plane via a mechanical 4-bar linkage. The linkage shall utilize cranks keyed to the main arm shaft and transmission shaft and an adjustable connecting rod between a pair of self-aligning spherical rod ends. The connecting rod shall be 1.5” (38 mm) diameter AISI 4140 alloy steel. An auxiliary crank shall be used, paired with the transmission crank, to reduce the load on the transmission and to better balance and stabilize the load on the housing and mounting structure. The auxiliary crank shall be mounted in a grease lubricated ball bearing. The velocity of the arm shall follow a sinusoidal pattern to provide smooth operation. The arm shall begin and end its full motion path with zero velocity and accelerate smoothly to maximum velocity at mid-travel.

TRANSMISSION: The mechanism linkage shall be driven by a fully enclosed, double-enveloping worm gear, double reduction speed reducer. The transmission shall have a rated capacity of not less than 23,000 inch-pounds, continuous duty, with an occasional momentary peak load rating of not less than 69,000 inch-pounds. The output shaft shall be 2.5” (63 mm) in diameter. Gear ratio used shall produce an operation time of approximately 16 seconds. [Option: Contact factory for other speed options.]

TORQUE LIMITER: A heavy duty torque limiter shall be provided to limit torque transmitted to the operating mechanism in the event of excessive winds or a physical obstruction to the arm that could damage the mechanism during operation. The torque limiter shall be capable of being set anywhere within a range of 10,000 to 75,000 in-lbs torque. Each torque limiter shall be factory set for the load recommended by the manufacturer, based on installation requirements. Each torque limiter shall be adjusted and tested at the factory, under over-load condition, for a minimum of 5 minutes to verify the setting. The gate limit switch assembly shall be driven from the output side of the torque limiter so that slippage of the torque limiter will have no effect upon the limit switch settings.

MOTOR: The motor voltage and phase shall be as specified by the customer. The motor horsepower shall be as recommended by the barrier manufacturer to suit the installation. The motor shall be a C-face design and shall be mounted directly to the transmission. The motor shall be instantly reversing and overload protected.

LIMIT SWITCH: The barrier limit switch assembly shall be a self-contained unit. The standard assembly shall provide eight (8) independent SPDT control switches. [Option: A 10 circuit or a 12 circuit limit switch assembly shall be provided when specified.] Switches shall be rated for 15 amps, 480 VAC. Switches shall be controlled by individually adjustable cams. The limit switch assembly design shall permit adjustment of all cams with the barrier in any position. The limit switch assembly shall have a removable cover to help prevent accidental contact with switch terminals. Shaft, cams, bushings
and housing pieces shall be of non-ferrous corrosion resistant materials.

BRAKING MECHANISM: The motor shall be equipped with a solenoid-release, automatic brake. The brake shall have a manual release lever to permit manual operation of the barrier during setup or emergencies.

ARM SHAFT: The main arm shaft shall be 3.5” (89 mm) diameter AISI 4140 high strength alloy steel with a minimum tensile strength of 140,000 psi. The shaft shall be mounted in heavy duty flange mount ball bearings assemblies.

DOORS: Front and rear access doors shall be mounted on strap hinges. Hinges shall be of the slip-off type and shall have stainless steel pins. A stop shall be mounted inside the door to secure the door from being raised off the hinges in the closed position. Door latches, two per door, shall use a vise action to compress a neoprene bulb-type gasket to seal the door openings. [Option: Door latches shall be stainless steel and shall be tamper-resistant.] [Option: A stainless steel strap shall extend across each door and fit over a heavy hasp to permit use of a padlock. Strap and hasp shall be designed to fit both standard style heavy-duty padlocks and high security shackleless (“hockey puck” style) padlocks. Padlocks shall be provided by others, keyed alike.]

ARM MOUNTNG TUBES: A pair of carbon steel rectangular tubes, hot dip galvanized after fabrication, painted aluminum, shall be rigidly affixed to the ends of the main arm shaft. The tubes shall be offset to locate the arm centerline at the height specified above the housing base. The tubes and a steel cross-member shall provide a sturdy mount for the arm and counterweights. The tubes shall have provision for easily adjusting the counterweight offset so the arm can be properly balanced in all positions.

COUNTERWEIGHTS: Lead counterweights shall be mounted at the rear of the side arm tubes to balance the arm. Counterweights shall be sectional and shall be balanced at the factory. The counterweights shall be coated with Amercoat 235 epoxy based paint.

ARM: The barrier arm design shall be a trussed tri-rail type fabricated from 3” OD aluminum tubing. Arm length shall be measured from the centerline of the barrier housing to the tip of the arm (maximum 60’). Stainless steel truss cables and a heavy duty spring type bumper rod shall be furnished with each arm to provide a stable and accurate landing position of the arm. Front and rear arm surfaces shall be covered with pre-striped alternating red and white high intensity reflective sheeting. Striping shall be 16” (406 mm) wide and vertical according to MUTCD. Remaining exposed surfaces shall be painted white.

ENERGY ABSORPTION CABLES: The barrier shall utilize 6×19 classification, 300 series stainless steel, annealed energy absorption cables to assist in diffusing the kinetic energy of an impacting vehicle. Cables shall be annealed in a coil not less than 42” diameter. Consult factory for barrier resistance capacity which shall necessarily depend on project specific conditions. The tri-rail arm shall have (3) three ½” (13 mm) nominal diameter cables minimum, one inside each tube facing traffic and one between the tubes. The energy absorption cables shall be joined together by cable brackets in order to provide a netlike energy absorption system.

SIDE ARM LOCK: At the housing, heavy duty side arm locks shall be mechanically linked to the operating mechanism to automatically engage and lock the side arm tubes into a rigid configuration when the arm is lowered, to assist in transferring the load into the housing in the event of an impact. This will minimize the chance of damage to the internal operating mechanism.

CABLE ANCHORAGE SYSTEM: The energy absorption cables shall be anchored at both ends of the span in the closed to traffic position. A “nearside” receiver shall be used at the housing or base end of the arm to capture the passive end locks and absorb loads during an impact. Details of the receiver shall be coordinated with the manufacturer to suit installation requirements.

ARM END LOCK: The energy absorption cables shall be anchored at the tip end of the arm in the closed to traffic position. A passive end lock mounted on the arm tip shall engage a rigidly mounted receiver on the “farside” of the roadway from the operator housing. End locks shall not require powered actuation for proper engagement.

MOUNTING: The barrier housing and receivers shall be fixed to a suitable foundation, as specified by the project engineer, using (8) eight 1” (25 mm) diameter anchor bolts for the barrier housing and (7) seven 1” (25 mm) diameter anchor bolts for the receivers. The barrier housing base shall provide 1.25” (32 mm) diameter mounting holes and the receiver bases shall have 1.25” (32 mm) diameter slotted mounting holes.

HANDCRANK: Both a handcrank and a drill crank shall be provided with each barrier to facilitate manual operation.

SAFETY SWITCHES, TERMINAL BLOCKS AND WIRING: A manual disconnect switch shall be provided, pre-wired at the factory to break the main motor leads, to protect personnel during service. A handcrank safety switch shall be provided to prevent automatic actuation of the barrier during manual operation. Additionally, safety switches shall be installed and set at the factory to break the control circuit when either access door is opened. Door safety switches shall have a pull-to-override feature for test operation and shall automatically reset when doors are closed. Control components and terminal blocks shall be mounted inside an electrical enclosure, which shall be mounted inside the operator housing, with roadway side access, except where customer requirements prevent this arrangement. Pressure-type, modular terminal blocks shall be fully labeled and clearly coded to wiring diagrams. All control wiring shall be clearly coded to wiring diagrams and shall terminate at the terminal block. Connections to screw-type terminals shall have lugs. Conductors shall be XHHW #14 AWG stranded, minimum.

OPTION: ARM ENDLOCK ENGAGEMENT INDICATION LIMIT SWITCH: [Option: The arm end lock shall be equipped with an extended range magnetic proximity switch and target to indicate correct engagement of the end lock. The switch shall be mounted on the arm end lock and send a confirmation signal only when the end lock is properly engaged. The mechanism shall be field adjustable and preset at the factory.]

ACCESSORIES AND MODIFICATIONS: All common accessories and modifications shall be available. Custom modifications and accessories shall be available through coordination with manufacturer.

WARRANTY: A warranty shall cover the barrier and related equipment against defective material and components for 1 year from date of shipment from manufacturer. Manufacturer shall furnish replacement parts for a minimum of 10 years. Replacement parts for most components shall normally be available in 1 working day. Lamps, fuses and other components designed for a life less than 1 year shall be covered for the rated life of the component or the warranty period of the component manufacturer.

PARTIAL LIST OF ADDITIONAL OPTIONS:
Stainless Housing Arm Finishes, Striping Materials and Colors
Anchor Bolts (provided by manufacturer)
Alternate Arm Designs
Mounting Template Arm Lights
Alternate Door Latch Styles
Flasher
Door Strap with Integral Heavy Duty Padlock Hasp
Reflective Button Delineator
Stainless, Tamper-Resistant Door Latches
Gong or Vibrating Bell

VR-6V Vertical Counterweight Resistance Barrier

GENERAL: The resistance barrier shall be Model VR-6V, as manufactured by B&B Roadway, (888) 560-2060.

APPLICATIONS: The barrier shall be designed for use as a penetration resistance barrier and shall be suitable for use as a warning barrier for wide spans. The barrier shall be explicitly designed for traffic control on movable bridges, as required by AASHTO’s current Standard Specifications for Movable Highway Bridges, and shall be suitable for similar applications as well.

HOUSING: The operating mechanism and main control components shall be contained in a weatherproof housing. The housing shall be constructed of .375” (9.5mm) carbon steel, hot dip galvanized after fabrication. Exterior surfaces shall be painted aluminum. All external fasteners shall be corrosion resistant. Arm shaft openings shall incorporate O-ring seals.

OPERATING MECHANISM: The barrier arm shall pivot in the vertical plane via a mechanical 4-bar linkage. The linkage shall utilize cranks keyed to the main arm shaft and transmission shaft and an adjustable connecting rod between a pair of self-aligning spherical rod ends. The connecting rod shall be 1.25” (32mm) diameter AISI 4140 alloy steel. An auxiliary crank shall be used, paired with the transmission crank, to reduce the load on the transmission and to better balance and stabilize the load on the housing and mounting structure. The auxiliary crank shall be mounted in a permanently lubricated bronze bearing. The velocity of the arm shall follow a sinusoidal pattern to provide smooth operation. The arm shall begin and end its full motion path with zero velocity and accelerate smoothly to maximum velocity at mid-travel.

TRANSMISSION: The mechanism linkage shall be driven by a fully enclosed, heavy duty worm gear, double reduction speed reducer. The transmission shall have an occasional momentary peak load rating of not less than 37,000 inch-pounds. The output shaft shall be 2” (51mm) diameter. Gear ratio used shall produce an operation time of approximately 16 seconds. [Option: Contact factory for other speed options.]

TORQUE LIMITER: A heavy duty torque limiter shall be provided to limit torque transmitted to the operating mechanism in the event of excessive winds or a physical obstruction to the arm that could damage the mechanism during operation. The torque limiter shall be capable of being set anywhere within a range of 10,000 to 75,000 in-lbs torque. Each torque limiter shall be factory set for the load recommended by the manufacturer, based on installation requirements. Each torque limiter shall be adjusted and tested at the factory, under over-load condition, for a minimum of 5 minutes to verify the setting. The gate limit switch assembly shall be driven from the output side of the torque limiter so that slippage of the torque limiter will have no effect upon the limit settings.

MOTOR: The motor voltage and phase shall be as specified by the customer. The motor horsepower shall be as recommended by the barrier manufacturer to suit the installation, typically 2 hp. The motor shall be a C-face design and shall be mounted directly to the transmission. The motor shall be instantly reversing and overload protected.

LIMIT SWITCH: The barrier limit switch assembly shall be a self-contained unit. The standard assembly shall provide 8 independent SPDT control switches. [Option: A 10 circuit or a 12 circuit limit switch assembly shall be provided when specified.] Switches shall be rated for 15 amps, 480 VAC. Switches shall be controlled by individually adjustable cams. The limit switch assembly design shall permit adjustment of all cams with the barrier in any position. The limit switch assembly shall have a removable cover to help prevent accidental contact with switch terminals. Shaft, cams, bushings and housing pieces shall be of non-ferrous corrosion resistant materials.

BRAKING MECHANISM: The motor shall be equipped with a solenoid-release, automatic brake. The brake shall have a manual release lever to permit manual operation of the barrier during setup or emergencies.

ARM SHAFT: The main arm shaft shall be 2.5” (63mm) diameter AISI 4140 high strength alloy steel with a minimum tensile strength of 140,000 psi. The shaft shall be mounted in heavy duty sealed ball bearings with lubrication fittings.

DOORS: Front and rear access doors shall be mounted on strap hinges. Hinges shall be of the slip-off type and shall have stainless steel pins. A stop shall be mounted inside the door to secure the door from being raised off the hinges in the closed position. Door latches, two per door, shall use a vise action to compress a neoprene bulb-type gasket to seal the door openings. [Option: Door latches shall be of stainless steel and shall be tamper-resistant.] [Option: A stainless steel strap shall extend across each door and fit over a heavy hasp to permit use of a padlock. Strap and hasp shall be designed to fit both standard style heavy-duty padlocks and high security shackleless (“hockey puck” style) padlocks. Padlocks shall be provided by others, keyed alike.]

ARM MOUNTING TUBES: A pair of carbon steel rectangular tubes, hot dip galvanized after fabrication, painted aluminum, shall be rigidly affixed to the ends of the main arm shaft. The tubes shall locate the arm centerline at 24” above the housing base. The tubes and a steel cross-member shall provide a sturdy mount for the arm.

COUNTERWEIGHTS: Hot dip galvanized steel counterweight plates shall be mounted onto carriers inside the vertical tubes to balance the arm. Counterweights shall be sectional and shall be balanced at the factory. The opening in the vertical tubes shall be closed with a removable cover to prevent ingress of water and debris and to provide access for service.

ARM: The barrier arm design shall be double rail aluminum tube (maximum 50’). [Option: Arm shall be tapered aluminum pole, or trussed tri-rail aluminum tube (consult factory for specific design and maximum arm length).] Arm length shall be measured from the centerline of the housing. Stainless steel truss cables and a roadway type bumper rod shall be furnished with longer arms at the discretion of the manufacturer. Front and rear arm surfaces shall be covered with pre-striped alternating red and white high intensity reflective sheeting. Striping shall be 16” (406mm) wide and vertical according to MUTCD. Remaining exposed surfaces shall be painted white.

ENERGY ABSORPTION CABLES: The barrier shall utilize 6×19 classification, 300-series stainless steel, annealed energy absorption cables to assist in diffusing the kinetic energy of an impacting vehicle. Cables shall be annealed in a coil not less than 42” diameter. Consult factory for barrier resistance capacity which shall necessarily depend on project specific conditions.

• Double rail aluminum tube arms shall use three .50” (12mm) cables, one inside each tube, and one along the center of the arm.
• Tapered pole arms shall use three .50” (12mm) cables, one inside the pole and one above and one below the pole.
• Tri-rail arms shall use three .50” (12mm) cables, one inside each tube facing traffic and one between these tubes.

ARM END LOCK: The energy absorption cables shall be anchored at the tip end of the arm in the closed to traffic position. A passive end lock mounted on the arm tip shall engage a rigidly mounted and anchored socket on or in a wall or post for independent barriers. For paired barriers, on-coming barrier shall be fitted with a bar and anchor nut while off-going barrier shall be fitted with a yoke. On-coming barriers shall be sequenced to close first and open last. The yoke on the off-going traffic barrier shall fit over the anchor nut in the closed to traffic position. The end lock system shall be designed so that the yoke will engage the anchor nut in a collision to connect the two barriers into a continuous unit. End locks shall not require powered actuation for proper engagement.

MOUNTING: The barrier shall be fixed to a suitable foundation, as specified by the project engineer, using eight 1” (25mm) diameter anchor bolts. The barrier housing base shall provide 1.25” (32mm) mounting holes.

HANDCRANK: Both a handcrank and a drill crank shall be provided with each barrier to facilitate manual operation.

SAFETY SWITCHES, TERMINAL BLOCKS AND WIRING: A manual disconnect switch shall be provided, pre-wired at the factory to break the main motor leads, to protect personnel during service. A handcrank safety switch shall be provided to prevent automatic actuation of the barrier during manual operation. Additionally, safety switches shall be installed and set at the factory to break the control circuit when either access door is opened. Door safety switches shall have a pull-to-override feature for test operation and shall automatically reset when doors are closed. Control components and terminal blocks shall be mounted inside an electrical enclosure, which shall be mounted inside the operator housing, with roadway side access, except where customer requirements prevent this arrangement. Pressure-type, modular terminal blocks shall be fully labeled and clearly coded to wiring diagrams. All control wiring shall be clearly coded to wiring diagrams and shall terminate at the terminal block. Connections to screw-type terminals shall have lugs. Conductors shall be XHHW #14 AWG stranded, minimum.

OPTION: ARM END LOCK ENGAGEMENT INDICATION LIMIT SWITCH: [Option (for barriers equipped with arm end locks): The arm end lock shall be equipped with an extended range proximity switch to indicate correct engagement of the end lock. The mechanism shall be mounted on the arm end lock and send a confirmation signal only when the end lock is properly engaged. The mechanism shall be fully adjustable and preset at the factory.]

ACCESSORIES AND MODIFICATIONS: All common accessories and modifications shall be available. Custom modifications and accessories shall be available through coordination with manufacturer.

WARRANTY: A warranty shall cover the barrier and related equipment against defective material and components for 1 year from date of shipment from manufacturer. Manufacturer shall furnish replacement parts for a minimum of 10 years. Replacement parts for most components shall normally be available in 1 working day. Lamps, fuses and other components designed for a life less than 1 year shall be covered for the rated life of the component or the warranty period of the component manufacturer.

PARTIAL LIST OF ADDITIONAL OPTIONS (contact factory for detailed specifications):
Stainless Housing Arm Finishes
Striping Materials and Colors
Anchor Bolts (provided by manufacturer)
Mounting Template Arm Lights
Alternate Arm Designs
Alternate Door Latch Styles
Flasher
Door Strap with Integral Heavy Duty Padlock Hasp
Reflective Button Delineator
Stainless, Tamper-Resistant Door Latches
Gong or Vibrating Bell

L7 Arm Warning Light

Typical Use Notes: This is typically used on warning gate arms or vertical barrier arms, spaced 4′ to 7′ apart. Often, the end light is wired to burn continuously and the remaining lights flash alternately (see separate specs for arm light flasher). Lights are normally controlled by the limit switch (see separate specification) to be off when the gate is open to traffic and on at all other times.

GENERAL: The warning light shall be B&B Roadway, Model L7, (888) 560-2060.

APPLICATIONS: The warning light shall be used as a traffic signaling light to mark and draw attention to the warning gate or traffic barrier.

HOUSING and GENERAL CONSTRUCTION: The housing shall be of black high impact plastic. Assembly shall be double-faced with lenses held in place by screws. Light assembly shall be mounted to warning gate arm or barrier using an aluminum adapter plate.

LENSES: Lenses shall be red fresnel plastic, approximately 7″ diameter.

LAMP and RECEPTACLE: Lamp shall be 1.44A (18W), 12V, clear, with a double contact bayonet base. Candle power of lamp shall be 21cp. Lamp shall have a rated life of 1,000 hours. [option:120V, 15W, 9 candle power lamp; 12V 100,000 hour LED lamp; 120V 100,000 hour LED lamp] 

4-Tier LED Lamp

The 120V and 12V 4-Tier LED Lamp consists of a 4-tiered array of 48 individual LEDs in an optically clear elastomer medium. In the event of failure of one or more individual LEDs, the remaining LEDs continue to operate. The entire assembly is neatly potted into a molded Rynite FR350 stem fitted with a standard medium screw Edison base. The lamp head is filled with an optically clear silicon gel.

12V Specifications (PDF)

120V Specifications (PDF)

Standard Lamps for Navigation and Warning Lights

Lamps provided by B&B Roadway, are selected to provide the best quality available. Our long-life lamps are custom manufactured for B&B Roadway to meet the demands of our industry. (Lamps are shown in receptacles for photographic purposes.)

MEDIUM BASE LAMPS: (back row, from left to right: “Scepter” LED, Incadescent, “4-Tier” LED) Typically used for navigation lights.

LED Lamps: The “Scepter” and “4-Tier” LED lamps have a rated life of 100,000 hours.  Savings on maintenance and power are the most common reasons for choosing an LED lamp.  These lamps have individual LEDs for maximum light output thus making it a suitable replacement for standard 120V incandescent lamps.  LEDs are color-matched to the lenses for maximum light transmission.  (Additional information for these lamps is available here.)

120V INCANDESCENT LAMP: This lamp features a rated life of 20,000 hours compared to typical incandescent lamps with rated lives of 1,000 to 2,000 hours. Many bridges have eliminated routine lamp maintenance by specifying the dual lamp/transfer relay option with these lamps on their navigation lights. Multiple filament support fingers make the lamp better suited to the rugged conditions seen on bridges and highways. The 100W rating provides the brightest light intensity available in the navigation light market.

DOUBLE-CONTACT BAYONET BASE LAMPs: (front row, from left to right: Incandescent, “Pancake” LED) Typically used for gate and barrier arm lights.

“pancake” led lamp: This lamp is available in 120V or 12V.  Both are rated for 100,000 hours and provides dramatic life improvement and reliability over incandescent lamps.  It can be used as a direct replacement or upgrade for most existing installations currently using bayonet lamps.  The “Pancake” LED also features a nickel-plated brass base for superior long-term resistance to corrosion and seizing.  LEDs are color matched to light lenses for maximum light transmission.

incandescent LAMP: This option is available for either a 120V or 12V lamp where an incandescent, double bayonet base lamp is required or preferred.

LSP Plunger Limit Switch

The Model LSP Plunger Limit Switch offers superior plunger switch performance for heavy industrial applications. The design can provide up to 6 individual circuits, more than any similar plunger type switch available, with accurate, repeatable snap-action activation and a substantial over travel. Materials and manufacture are of the highest quality for many years of dependable service.

GENERAL: Plunger Limit Switch shall be Model LSP by B&B Roadway, (888) 560-2060.

CONSTRUCTION: Switch shall be a weather-sealed design, with neoprene gaskets between exterior bolted connections. Cover shall be designed to positively retain a gasket. Drain plugs and a breather shall allow condensation to evaporate or drain from housing. Construction shall be heavy duty, durable and suitable for marine environment. All materials shall be non-corrosive, such as aluminum, bronze, stainless steel or non-metallic. Finish shall be painted aluminum or safety orange, as specified.

PLUNGER: Plunger extension shall permit at least .75″ field adjustment and shall have a rounded end [option: ball end]. Design shall also allow for simple field swapping of service cover hand. Plunger shaft shall be stainless steel. Pre-travel shall be approximately 1.50″ with a minimum overtravel of 2.00″.

ACTIVATION MECHANISM: Trip plate shall be spring loaded with an over-center mechanism to provide simultaneous, positive, accurate, and repeatable snap-action activation of all switches. Trip point shall be field adjustable by simple adjustment of plunger extension.

CIRCUIT SWITCHES: The number of circuits shall be as specified (6 circuits max in standard assembly). Each circuit shall provide independent normally open and normally closed sets of contacts (1 NO and 1 NC). Heavy-duty snap-action microswitches shall be double-break type to increase contact life. Individual switches shall be rated for 15A make / 40A break at 120V (see manufacturer for ratings at other voltages). Switches shall have clearly labeled screw-type compression wire connections and corrosion-resistant contacts.

CONDUIT ENTRY: A 1″ conduit hub shall be provided for wire entry. Housing shall be pre-drilled to permit switching the hub to either side of the housing. Second opening shall be sealed with an o-ring and cover plate.

LSB Rotary Limit Switch

NEMA 4 or 4X, multiple options and configurations, 4-32 cam sets

The Model LSB Rotary Limit Switch features a unique proprietary cam locking and adjustment mechanism (patent pending). Adjustment of the cams is unequaled in simplicity and accuracy. The LSB Rotary Limit Switch is designed for rugged durability and dependability under harsh conditions. Materials and manufacture are of the highest quality. Models are available with up to 24 or more individual circuits (6-circuit model is shown).

GENERAL: Rotary Limit Switch shall be Model LSB by B&B Roadway, (888) 560-2060, or an approved equal meeting all specifications defined herein.

CONSTRUCTION: Switch shall be a weather-sealed design. Cover shall be designed to positively retain a gasket. A drain plug and breather shall allow condensation to evaporate or drain from housing. Construction shall be heavy duty, durable and suitable for marine environment. All materials shall be non-corrosive, such as aluminum, bronze, stainless steel or non-metallic. Finish shall be painted aluminum or safety orange (shown), as specified.

SHAFT DESIGN: Shaft extension shall be right-handed, left-handed or dual, as specified. Standard switch design shall allow for simple, modular-type conversion between right and left hand in field, allowing removal of complete shaft assembly without detailed disassembly and re-assembly of components. Design shall also allow for simple field conversion to dual-shaft arrangement. Output shaft shall be bronze or other suitable corrosion-resistant material, ¾” [19mm] diameter, with standard square keyway 1.75″ [44mm] long. Shaft shall extend 2″ [51mm] beyond base surface [option: extension and key length as specified]. A suitable sprocket or gear shall be provided by the installer.

CAMS: Cams shall be individually adjustable and shall be firmly and immovably engaged to the shaft under operating conditions. Loosening of a single nut shall allow independent and individual adjustment of any individual cam or cam half. Adjustment of a cam shall not affect setting of other cams or cause movement of other cams. Re-tightening of the nut shall secure all cams to the shaft. Each cam shall consist of a pair of cam halves to permit independent setting of make and break points. Contract plans shall show approximate settings and appropriate cam halves shall be provided to achieve the settings required.

INDEX WHEEL: Rotary switch shall be equipped with at least one index wheel and a pointer. Index wheel shall be marked in degree, with individual increments as small as practical. Index label shall read 0-90 degrees [option: 0-180 or 0-360].

CIRCUIT SWITCHES: The number of circuits shall be as specified. Each circuit shall be controlled by an independent 2-part cam, which activates a SPDT switch. Individual switches shall be rated for 15A [option: 20A]. Switches shall have clearly labeled screw-type wire connections and corrosion-resistant contacts.

CONDUIT ENTRY: A 1″ conduit hub shall be provided for wire entry on switches having up to 16 circuits. A 1 ¼” conduit hub shall be provided on switches having more than 16 circuits. Conduit hub shall normally be installed opposite the shaft. Housing shall be pre-drilled to permit switching the hub to either side of the housing. Second opening shall be sealed with an o-ring and cover plate.

OPTIONAL GEAR REDUCER: A 4:1 gear reducer shall be supplied when specified. Contact factory for details.

Air Horns

GENERAL: The air horn shall be B&B Roadway, 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 shall be of spun brass, approximately 18” (457mm) 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 250 and 320 Hz with a decibel rating of 120db at 10 feet.

COMPRESSOR UNIT: Compressor motor shall be 1 HP, 120V, 60 Hz, 10.4 FLA. Compressor shall be a weatherproof, rapid response, direct drive piston type compressor. Piston and cylinder shall be an oil-less, non-lubricated type, with a Teflon compound piston ring. Compressor valves shall be stainless steel. Bearings shall be permanently sealed, pre-lubricated ball type, requiring no maintenance. All components and fasteners shall be corrosion resistant.

MOUNTING: The standard air horn assembly shall be a single unit comprised of compressor and horns and shall be suitable for outdoor mounting.

FIELD CONNECTIONS: The electrical contractor shall also provide a pushbutton or similar control device at the control station for operation of the air horn.

GL Gauge Lights

GENERAL/APPLICATION: The gauge light shall be Model GL, as manufactured by B&B Roadway, (888) 560-2060 and shall be designed for use as a gauge sign illumination light, per Coast Guard requirements.

FIXTURE (HPS Model): [Note: this paragraph applies to the High Pressure Sodium fixture ONLY.] The fixture housing body shall be of precision die cast aluminum with a durable powder coat finish. All components shall be corrosion resistant. Construction shall be rain-tight and shall be equipped with a retained gasket. Lens shall be thermal-tempered shock-resistant glass. A reflector shall be used to maximize light output. Fixture shall be designed with a hood to reduce glare. Fixture head rotation shall be adjustable and incorporate locking teeth and internal gasket for secure, leak-free positioning of the head. Hinge pins and external fasteners shall be of stainless steel.

FIXTURE (LED Model): [Note: this paragraph applies to the LED fixture ONLY.] The fixture housing body shall be of precision die cast aluminum with a durable powder coat finish. All components shall be corrosion resistant. Construction shall be rain-tight and shall be equipped with a retained gasket. Lens shall be thermal-tempered shock-resistant glass. Fixture head rotation shall be adjustable and incorporate locking teeth and internal gasket for secure, leak-free positioning of the head. Hinge pins and external fasteners shall be of stainless steel.

LAMP (HPS Model): [Note: this paragraph applies to the High Pressure Sodium fixture ONLY.] Lamp shall be 35W, 120V, clear, high pressure sodium, medium base, rated for 24,000 hours life. Starting amps shall be 1.4A. Operating amps shall be .9A at 120VAC. Receptacle shall be standard medium base. A 2-position adjustable socket shall enable adjustment of beam spread. No tools shall be required for re-lamping.

LAMP (LED Model): [Note: this paragraph applies to the LED fixture ONLY.] Lamp shall be a 12V LED array. nominal life shall exceed 50,000 hours life. supply power shall be 12VDC, or, when specified as an option, a step transformer and rectifier shall be provided in the junction box to convert power from 120VAC supply.

ACCESSORY CABINET: A cast aluminum NEMA 4X accessory and electrical connection cabinet shall be included as part of the gauge light assembly. The cabinet shall have a hinged cover fitted with a gasket. Terminal blocks for convenient wiring shall be installed in the cabinet. All wiring shall terminate inside the accessory cabinet. The lamp shall be pre-wired to the terminal block. The cabinet shall provide for secure mounting to the gauge post using a square 4-bolt pattern.

AVAILABLE OPTIONS: 

12VAC Model: When specified, matched step-up and step-down transformers shall be included to permit running 12V lines between a 120V power source and the gauge light. One transformer shall be pre-wired and mounted inside the accessory cabinet to step power back up to 120V to supply the lamp. The second transformer shall be shipped separately for mounting in the field, as determined by the engineer. [Note: 120V HPS specifications apply above.]

Photo Control: When specified, a photocell shall be included, pre-wired, to automatically turn the gauge light on when ambient lighting approximates dusk and off when ambient lighting approximates dawn.

VL Vertical Lift Span Light

GENERAL: The vertical lift span light shall be Model VL, as manufactured by B&B Roadway, (888) 560-2060, or an approved equal meeting all specifications defined herein.

APPLICATIONS: The navigation light shall be designed for use as a marine signal light for marking vertical lift bridge spans, per Coast Guard requirements.

HOUSING and GENERAL CONSTRUCTION: The housing shall be of cast aluminum [option: cast silicon bronze]. Casting alloy used shall be suitable for marine environment. Construction shall be rain-tight and fully gasketed. The light assembly shall be designed for heavy duty, long life service. Design shall provide ready access for lamp service.

LENS: Lens shall be heat-resistant fresnel glass. Lens sections shall be 180 degrees red over 360 degrees green. Inside lens diameter shall measure approximately 7″ (175mm). Outside lens diameter shall measure approximately 8″ (205mm).

LAMP and RECEPTACLE: Lamps, one per section, shall be 100W [option: 60W], 120V, A-19 shape, clear. Lamps shall have a rated life of 20,000 hours and shall be of a rough service design with multiple filament support fingers. Medium base receptacles shall be rated for 250V, 660W and shall be porcelain with a nickel-plated brass shell to resist lamp freezing. [OPTION: Dual lamp option adds a second lamp and receptacle in one or both sections as specified.][OPTION: A single medium base, 120V, 100,000 hour LED lamp shall be provided in a color to match the lens.]

STEM: Lamp fixture head shall be suspended from the swivel on a 1 1/2″ schedule 40 pipe, 1.90″ O.D. (48mm) [option: 2″ schedule 40 pipe, 2.375″ O.D. (60mm)]. Pipe material shall be galvanized steel [option: stainless pipe used with bronze castings]. Standard dimension from center of swivel to focal plane of upper lens shall be 48″ (1219mm) [option: dimension as specified].

SWIVEL: The swivel design shall provide for all wiring to be completely contained inside the light assembly. Gaskets and o-rings shall be used to provide a weather-tight assembly. Swivel shall be of heavy-duty construction, cast of the same material as the fixture head. Spindle shall be of stainless steel.

AUTOMATIC LATCH: An automatic latch shall hold the light securely in normal operating and service positions. A firm pull on the service chain shall automatically release the latch, allowing the fixture to pivot. As the light is raised, latch shall automatically engage to hold light in the service position. Service position shall be 30 degrees from vertical [option: as specified]. Fixture assembly shall be dual-handed (i.e. light may be pulled up from either side).

MOUNTING: Base shall be cast of the same material as the fixture head (aluminum or silicon bronze). Light assembly shall mount via four 1/2″ diameter bolts through the base, provided by installer to suit installation.

SWITCHING CONTROL: Power shall be switched between red (bridge closed to maritime traffic) and green (bridge open) sections by a separate remote switch as part of the bridge controls.

PARTIAL LIST OF AVAILABLE OPTIONS: (items marked with ** are most popular options)

** Junction Box: A cast junction box with gasketed access cover shall be provided when specified. Junction box shall be of the same material as the fixture assembly and shall match the navigation light base footprint. Orientation of junction box shall be capable of rotation in 90-degree increments. Junction box shall provide two conduit entries, threaded for ¾” standard pipe size [option: 1″ pipe size].

** Dual Lamps: When specified, a dual lamp arrangement shall be provided. An automatic transfer relay shall switch power to the backup lamp upon failure of the primary lamp. The relay shall provide a second independent contact for remote signaling of “primary lamp failure” status. Transfer relay components shall be contained in a cast box of the same material as the fixture head.

Indicator Light: An indicator light to signal “primary lamp failure” status shall be included, when specified, for remote installation. The indicator light shall have a 360 degree blue fresnel lens. A 27W lamp shall be included.

Rectifier: A rectifier shall be pre-wired as part of the light assembly, when specified. (Rectified power increases lamp life approximately 20%.)