C68-0501.22 Trailer Mounted Attenuator A3.xlsx
XLSX spreadsheet 20 KB Posted
- Attached to
- Truck and Trailer Attenuator Contract
- Solicitation number
- RFP 591 220000001069 1
- Issued by
- Michigan
About this file
This is a specification document for RFP Department 591, No. 220000001069, issued by what appears to be the Michigan Department of Transportation (MDOT), detailing requirements for a trailer-mounted attenuator with replaceable cartridge and arrow board sign meeting NCHRP 350 TL3 standards. The specification requires contractors to provide a single new trailer-mounted attenuator system capable of being towed behind a support vehicle, featuring a hydraulic cylinder dampener system, support structure with articulating arms, impact frame, intermediate frame, cylinder hitch assembly, and associated components. The unit must comply with specific dimensional requirements including a maximum height of 45 inches from ground, maximum impact face width of 7 feet 9 inches, total length of 18 feet 11 inches, and weight of 2,650 pounds. The attenuator system must be equipped with an integrated arrow sign board measuring 48 inches high by 96 inches wide with 15 replaceable Par 46 LED arrow lamps, manual tilt design with worm gear assembly, and solid-state controller with LED display. All components must be new, of the latest model in current production, include standard features, and utilize soldered electrical connections in heat shrink or waterproof junction blocks, with no scotch locks or wire nuts acceptable.
The specification mandates that the attenuator pass all NCHRP 350 TL3 tests (TL 3-50 through TL 3-54) and an accelerated endurance test simulating anticipated shock loading. All welding must be performed by or under direction of a certified welder, with metal work manufactured in America and proper paint preparation including primer or powder coating. The arrow board controller must support simultaneous or sequential arrow display with caution modes, be fully enclosed with sealed hinged lockable lid, and utilize quick-connect weatherproof connections. Power is to be supplied from the towing vehicle, supplemented by a 55-watt solar panel with 4-amp regulator wired to a 12-volt marine battery system housed in a lockable steel enclosure. The specification requires approximately 70% of components and framework to be reusable following a design impact, with the unit remaining refurbishable using simple hand tools. Compliance with FMVSS 108 standards, LED lighting systems with synchronized strobe lights, and conspicuity tape installation per NHTSA standards are mandatory requirements.
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Other files
| File | Type | Posted |
|---|---|---|
| C68-0501A.22 Trailer Mounted Attenuator A4.xlsx | XLSX spreadsheet | |
| C68-0001AM.22 Truck Mounted Attenuator A6.xlsx | XLSX spreadsheet | |
| Schedule A.docx | DOCX document | |
| Standard Contract Terms.docx | DOCX document | |
| C68-0001A.22 Truck Mounted Attenuator A2.xlsx | XLSX spreadsheet | |
| C68-0001M.22 Truck Mounted Attenuator A5.xlsx | XLSX spreadsheet | |
| Schedule B Pricing.xlsx | XLSX spreadsheet | |
| RFP Instructions.docx | DOCX document | |
| C68-0001.22 Truck Mounted Attenuator A1.xlsx | XLSX spreadsheet | |
| C68-0501M.22 Trailer Mounted Attenuator A7.xlsx | XLSX spreadsheet |
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Text version
Sheet1
| RFP Dept. 591, No. 220000001069 | |
| Specification # C68-0501.22 Trailer Mounted Attenuator, Replaceable Cartridge. with Arrow Board Sign, Meeting NCHRP 350 TL3 Standards |
All items specified and furnished by the Contractor shall be new of the latest model in current production and shall include all standard features normally offered with these models CONTRACTOR must respond to each section with YES. (or additional information as requested)
If NO is indicated provide explanation and available option.
| Contract to identify proposed make and model | ||
| Brands or trade names are for identification purposes only and do not limit the Contractor to such brands | Make and Model | |
| 1.0 | Basic Requirements: | |
| 1.1 | All wires passing through holes in metal or non-metal wearing surfaces, which could cause wear of the insulation, shall be adequately protected by rubber or plastic grommets, and/or non-metal conduit. Ends of all wires shall be adequately anchored to prevent loosening. All wiring shall be properly secured to the unit by proper wiring hangers. |
| 1.2 | Ends of all wires shall be adequately anchored to prevent loosening |
| 1.3 | All electrical connections shall be soldered and enclosed in heat shrink or in water tight junction blocks |
| 1.4 | Scotch locks and wire nuts are not acceptable |
| 1.5 | Unit number will be provided and shall be welded to the unit in 2 inch high numbers or welded or stamped to a plate and bolted to the unit |
| 1.6 | Trailer mounted attenuator system can be used with any weight over 9,920 pounds |
| 1.7 | Trailer mounted attenuator system shall use a hydraulic cylinder dampener system to minimize rotation during an offset impact, thus helping to possible secondary accidents (this system will allow the trailer to act like a normal trailer and resist rotation when impacted) |
| 1.8 | No portion of the attenuator shall protrude forward under the truck damaging its vital elements during an impact |
| 1.9 | Attenuator shall not impede the line-of-sight of an arrow board or message board mounted on the truck installed per MUTCD (Manual on Uniform Traffic Control Devices) guide lines at a height of 7 feet to the bottom of the board |
| 2.0 | Following a design impact under NCHRP TL-3 conditions, the attenuator shall remain less than 12 feet wide and retain its structure to permit short distance transport off of the road after impact |
| 2.1 | Attenuator shall be capable of being refurbished using simple hand tools and replacement parts |
| 2.2 | After a design impact, approximately 70% of the components and framework shall be reusable |
| 2.3 | Trailer mounted attenuator shall consist of the following components: |
| a | Support structure with articulating arms |
| b | All cartridges (all cartridges shall be contained within the frame work created by the arms) |
| c | Impact frame |
| d | Cylinder hitch assembly |
| e | Intermediate frame |
| f | Shall be equipped Torflex heavy duty, axle, wheels, tires and brakes sized to match the weight of the unit |
| g | Shall be equipped with electric trailer brake away system |
| h | Shall be equipped with safety chains and a 3 inch pintle hitch rated to meet the crash rating of the unit |
| 2.4 | Attenuator shall have a standard trailer lighting system compliant with FMVSS 108 standards, wired for turn signals independent of stop lights |
| 2.5 | Lighting system shall include brake, tail, ICC bar, and turn signals that are LED type |
| 2.6 | Wiring for the rear lights shall be routed in a protective jacketed cable |
| 2.7 | Wiring cable shall be routed and secured to the frame at 18 inch interval maximum |
| 2.8 | Molded electrical connectors shall be used where individual wires would other wise be exposed to the elements |
| 2.9 | Light connector shall be round 7 pin Berg type |
| 3.0 | Light connector wired to MDOT specifications |
| 3.1 | Two (2) flush mount strobe lights which are synchronized shall be provided in the rear strike plate, lights shall be an amber/green LED combination light. Flash pattern is to be set to the following pattern, Amber - Quad fast flash, Green - Single slow flash. 4" round Whelen # 2EP00ZCRMDOT, Oval # 50AG2ZCRMDOT or equivalent |
| 3.2 | Conspicuity tape and reflectors shall be installed in compliance with all applicable NHTSA, FMVSS and SAE Standards |
| 3.3 | One (1) hand crank jack with swivel caster having a rated load capacity of 600 pounds minimum shall be provided |
| 3.4 | Rear strike facing surface of the frame assembly shall display a black on yellow inverted "V" chevron pattern with a 4" wide color bands when in the horizontal position |
| 3.5 | All welding shall be done by, or under the direction of a certified welder |
| 3.6 | Metal work shall be made in America |
| 3.7 | Paint shall be applied after the proper preparation of all steel and aluminum components, including cleaning, degreasing, and abrading the metal surfaces |
| Primer shall be used if units are not powder coated | |
| 3.8 | Hydraulic system shall consist of cylinders, hoses, tank and sub components |
| 3.9 | Hydraulic system shall allow the trailer mounted attenuator system to articulate like a normal trailer behind the support vehicle, but locks to prevent the trailer from rotating during off set or angled impacts |
| 4.0 | Brackets shall be provided to attach hydraulic cylinder to tow vehicle |
| 4.1 | Maximum height from ground shall be 45 inches |
| 4.2 | Maximum width of impact face shall be 7 feet 9 inches |
| 4.4 | Weight shall be 2650 pounds |
| 4.5 | Length shall be 18 feet 11inches |
| 4.6 | Hitch extension adaptor kit |
| 4.7 | Attenuator system steel support frame and strike plate shall be easily refurbishable and reusable after a typical design impact |
| 4.8 | Cartridges shall be a light weight aluminum type |
| 4.9 | Attenuator shall have the following performance criteria: |
| 5.0 | Attenuator shall have passed all tests required under NCHRP 350 TL 3-50 |
| 5.1 | Attenuator shall have passed all tests required under NCHRP 350 TL 3-51 |
| 5.2 | Attenuator shall have passed all tests required under NCHRP 350 TL 3-52 |
| 5.3 | Attenuator shall have passed all tests required under NCHRP 350 TL 3-53 |
| 5.4 | Attenuator shall have passed all tests required under NCHRP 350 TL 3-54 |
| 5.5 | The Attenuator shall be capable of passing an accelerated endurance test, which duplicates anticipated shock loading the system may encounter in actual use. |
| 5.6 | ARROW SIGN BOARD |
| 5.7 | Sign board shall be aluminum construction, welded frame 48 inch's high x 96 inches wide with flat black finish. |
| 5.8 | Arrow board shall be a manual tilt design with a worm gear and crank assembly to raise and lower the board |
| 5.9 | 15 replaceable lamps shall be Par 46 LED arrow lamps |
| 6.0 | Controller shall be solid state design, capable of simultaneous or sequential arrow with caution modes |
| 6.1 | Controller shall have LED display illustrating exact message mode arrow board will display |
| 6.2 | Controller shall be fully enclosed, sealed, hinged lid, lockable with padlock and mounted on the curb side of trailer |
| 6.3 | All connections shall be quick connect weatherproof design |
| 6.4 | Operating height of sign shall be approximately 146 inches |
| 6.5 | Travel height shall be approximately 88 inches |
| 6.6 | Power for the arrow shall be from the towing vehicle |
| 6.7 | Arrow board shall be equipped with a 55 watt solar panel equipped with a 4 amp regulator, wired to connect to a 12 volt marine application battery |
| 6.8 | Unit shall be equipped with a marine battery box and steel enclosure, lockable with a padlock |
| END OF SPECIFICATION |
&14Attachment A3 2200000000
Sheet2
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