Attachment D - Slope Body Specs.pdf

SPECIFICATIONS FOR BODY, DUMP, SLOPE FRONT, 6 ½ - 16 CUBIC YARD

SCDOT Spec. No. B111.05 – 07/09/26

1. DESCRIPTION: The dump body shall be a heavy-duty body and hoist assembly designed and constructed for handling stone, dirt, and asphalt in highway maintenance applications.

Additional uses shall include tailgate- and hopper-type material spreader installations for snow removal.

2. CAPACITY: Three body sizes shall be available, measured water level, with capacities of 6½, 12, and 16 cubic yards.

3. DIMENSIONS: The inside width and inside floor length of the body shall meet the minimum requirements shown in the table below. The height of the body sides shall be proportioned to provide the specified cubic-yard capacity.

Body Size Inside Width

Inside Floor

Length Side

Height Headboard

Height Tailgate Height

Rear Post Height

9.5 ft 87" 114" 34" 56" 46" 44" 12 ft 87" 144" 44" 56" 46" 44" 16 ft 87" 192" 44" 56" 46" 44"

4. BODY: The body sides, floor, front, fenders, and tailgate shall be constructed of nominal 3/16-inch steel. The dump body shall be engineered for severe-duty highway maintenance service, providing high abrasion resistance, structural integrity, fatigue life, and corrosion resistance under repeated loading and unloading and exposure to harsh environmental conditions. All enclosed or boxed structural members shall be self-draining. Longitudinal sills shall incorporate drainage provisions effective when the body is in the lowered position.

5. SIDES: The body sides shall be fabricated from single sheets of 3/16-inch AR450 steel and shall comply with the following requirements:

5.1 Side sheets, floor, and main sill shall be full length with no cross-splices.

5.2 Side sheets shall have two full-length V-bends centered between the top rails and fenders.

5.3 The sides shall be welded to full-height rear corner posts extending to the lower edge of the full-width rear apron and shall be continuously welded to the front sheet.

5.4 Each side sheet shall overlap the floor radius and extend to the top of the top rail.

All welding on the sides shall be continuous (100%).

6. TOP RAILS: The top rail shall be a dirt-shedding angle section. The top rails shall provide perimeter rigidity, prevent material accumulation on upper surfaces, and form a strong, integrated structure with the side sheets suitable for the body size and intended load conditions.

7. FENDERS: The fenders shall be fabricated from a minimum of 3/16-inch AR450 steel and shall extend the full length of the body on each side.

7.1 The sloping surface shall be inclined at not less than 45 degrees.

7.2 Each fender shall have a 4-inch vertical face and a return flange for additional strength.

7.3 The inside of each fender shall be boxed for strength and shall be open at the rear to permit drainage and wiring access.

7.4 Each fender shall have one 2¾-inch round punched hole at the front for an LED amber marker lamp. The lamp shall be provided.

7.5 The curb-side fender sloping surface shall have one 1⅜-inch round punched hole and two 1-inch round punched holes at the rear for spreader hydraulic supply and return bulkhead fittings.

7.6 A retractable access ladder with two or three steps, grab handles, and a positive latch to secure the ladder in the horizontal stowed position shall be mounted beneath the curb-side fender.

7.7 The trap-arm pivot point shall be located on the side of each fender, with the control mechanism mounted beneath the driver-side fender.

7.8 Each fender shall have two 4-inch × 5-inch steel tie-down brackets to accommodate 3-inch flat-hook ratchet straps. The front brackets shall be mounted approximately 32 inches from the front of the fender, and the rear brackets approximately 18 inches from the rear corner posts. The right-front bracket shall not interfere with access to the ladder or handrails.

8. REAR POSTS: The rear posts shall be fabricated from weathering steel having an

Atmospheric Corrosion Index (ACI) greater than 6.0.

8.1 Rear posts shall form a box section at least 10 inches wide.

8.2 Posts shall extend from the top of the sides to the bottom of the rear panel.

8.3 The top of each post shall be formed at a 45-degree angle for the upper tailgate pin, and the bottom shall incorporate a 30-degree apron.

8.4 Posts shall provide sufficient depth to accommodate recessed, rubber-mounted lamps.

8.5 Each post shall have one 3/8-inch round punched hole on top for mounting a perimeter LED lamp at a 45-degree angle.

8.6 Each post shall include an access/cleanout panel on its outer surface.

8.7 The body shall be prewired with a connector beneath the body near the tailgate for connection to the cab-and-chassis wiring harness.

8.8 The body shall be equipped with steel front mud guards and rear mud flaps bearing the approved SCDOT logo, suspended on chains.

9. FRONT: The front of the body shall be sloped and fabricated from a single sheet of 3/16-inch AR450 steel.

9.1 The inside of the front sheet shall be reinforced with structural angles.

9.2 The top flange shall be welded to the top of the bulkhead with a double-bend design extending the full inside width of the body.

9.3 The front sheet shall incorporate handholds and covers for the front ends of the trapezoidal long beams.

9.4 The body shall be equipped with a tarp box mounted at the top of the sides, fabricated from 10-gauge 50-ksi steel and sloped to provide drainage.

9.5 The leading edge of the cab shield shall incorporate a wind deflector to protect automatic load covers.

9.6 The cab shield shall have two 2¾-inch round punched holes for LED amber marker lamps, which shall be provided.

9.7 Wiring conduit shall run up the driver side and across the front of the body with a covered 6-inch center break.

9.8 The headboard brace shall be cut at the same angle as the rear post.

9.9 A 2-inch steel lip behind the cab shield shall be turned outward at a 45-degree angle for mounting perimeter warning lamps on both sides. Each lip shall include one 3/8-inch round punched hole for an LED perimeter lamp.

9.10 Vendor or dealer identification and advertising shall not be permitted.

10. FLOOR: The floor of the dump body shall be fabricated from a single sheet of 3/16-inch AR450 steel, with a minimum width of 96 inches.

10.1 Side sheets, floor, and main long sill shall be full length with no cross-splices.

10.2 The floor shall have suitable radii and a wide, flat center section to provide the specified capacities and promote abrasion resistance and material flow during dumping and spreading. It shall integrate fully with the sides and understructure for maximum strength.

10.3 The center section of the floor shall be flat and not less than 5 feet wide.

11. CROSS SHAFT: The cross shaft shall be not less than 1¼ inches in diameter and shall be located near the rear of the body.

11.1 A minimum of four greaseable cast-steel blocks shall support the cross shaft, one on each side of the trapezoidal long beam and one at each end.

11.2 The latching mechanism shall be of the over-center design.

11.3 Adjustable linkage rods shall connect the rear cross shaft to the lower hardware.

12. UNDERSTRUCTURE: The understructure shall be of cross-memberless design. The body shall not use underbody cross-members for support. The design shall be smooth-sided and employ underbody I-beam or trapezoidal main supports.

12.1 The longitudinal members shall be formed from 3/16-inch AR450 steel.

12.2 The inner leg shall be vertical, and the outer leg shall slope outward to support the floor.

12.3 Structural long beams are not acceptable.

12.4 A full-width rear panel formed from a single sheet of 3/16-inch AR450 steel shall be provided.

12.5 The bottom of the rear panel shall incorporate a formed return flange at least 1 inch wide.

12.6 The longitudinal members shall be continuously welded to the floor and to the rear panel.

12.7 A full-length rubber cushion shall be provided along each long sill.

12.8 The rear hinge shall consist of a 1¾-inch steel platform with a full-width pin.

13. TAILGATE: The tailgate shall be fabricated from a single sheet of not less than 3/16-inch AR450 steel.

13.1 The tailgate shall be a double-acting, two-panel design with a minimum 3/8-inch Grade 80 chain attached and hooked at the top with a 90-degree chain guard at the bottom.

13.2 Chain lengths shall permit the tailgate to be lowered horizontally and opened from the bottom during spreading operations.

13.3 Three ½-inch D-rings shall be welded to the ends and center of the upper crossmember, and one ½-inch D-ring shall be welded to the center of the lower crossmember for removal and lifting.

13.4 The upper hardware shall be fabricated from flame-cut 1-inch steel or approved equal and shall be of the upward-acting design.

13.5 All bracing shall be continuously welded and of material-shedding design suitable for severe-duty service.

13.6 The lower tailgate pins shall be at least 1¼ inches in diameter and extend the full width of the tailgate with minimal lateral movement.

13.7 The lower hardware shall be cast steel of the overshot design.

13.8 Cast “no-jump” banjo hooks shall be provided in the rear posts, both top and bottom, to secure spreader chains.

13.9 Hooks shall be provided on the gate to retain the chains when not in use. The operating device shall latch over center in the closed position.

13. 10 The tailgate latch shall be air operated by a double-acting cylinder mounted between the body long beams at the rear. The cylinder shall have a 2½-inch bore and a 6-inch stroke.

13.11 The control switch shall be located within easy reach of the operator in the cab.

13.12 The body shall include an asphalt taper at the rear.

14. TARP SYSTEM: The body shall be equipped with an electric direct-drive tarp system, complete with hardware, cab-mounted controls, and an asphalt-rated tarp suitable for the specified body capacities. All tarp hardware shall be installed prior to priming and painting.

The tarp-arm pivot bracket shall be mounted on the center side rail. Mountain Tarp or approved equal shall be provided.

14.1 All tarp hardware shall be installed prior to priming and painting, with the tarp-arm pivot bracket mounted on the center fender.

14.2 Dual side-mounted control arms and crossbar shall be constructed of premium gloss aluminum with externally mounted adjustable springs and shall arch to maximize loading clearance.

15. HOIST: The hoist shall be a telescopic hydraulic system rated in accordance with the current

NTEA Dump Body and Conversion Hoist Chart. Minimum ratings shall be:

6½ cu yd: NTEA Class 80 (minimum 16 tons) 12 cu yd: NTEA Class 90 (minimum 23 tons) 16 cu yd: NTEA Class 110 (minimum 29 tons)

The system shall include a cartridge-type relief valve, pneumatic limiter, and body-raised warning light. The manufacturer shall be an NTEA member, and the hoist shall be listed on the current chart.

16. HYDRAULIC TANK: The hydraulic tank shall be rectangular, fabricated from 10-gauge stainless steel, and shall have a minimum capacity of 21 gallons for 6½- and 12-cubic-yard bodies and 30 gallons for 16-cubic-yard bodies.

16.1 Pipe connections shall include a 1¼-inch top bung for the oil sender, a ¾-inch front-mounted case drain, a 1¼-inch front-mounted return line to the tank-mounted filter, and a 2-inch suction line.

16.2 The tank shall be baffled and equipped with a magnetic drain plug, vent cap, and fill basket.

16.3 The tank shall include a 3/8-inch fluid-level indicator, temperature gauge, and 141-micron suction strainer.

16.4 Hydraulic fluid shall be filled to the full mark after the system has been bled and checked for leaks.

16.5 The truck body and chassis dealers shall coordinate hole locations required for mounting the dump body and hoist. Hydraulic fluid shall be supplied by the body dealer.

16.6 A ball-valve shut off shall be installed in the suction line at the tank.

16.7 The reservoir shall incorporate a 16-micron absolute return filter rated at not less than 70 GPM, with visual and electrical bypass indicators and a synthetic-media cartridge. The return port shall be SAE #20 or larger, and a cab warning light shall be provided.

16.8 A combined low-oil/high-temperature sender shall be installed in the reservoir as specified in the original draft.

16.9 A “HYDRAULIC OIL ONLY” decal shall be affixed to the tank.

16.10 A high-pressure filter rated at 25 microns absolute and 6,000 psi, with visual and electrical bypass indicators, shall be installed between the pump and control valve assembly. A warning light and buzzer shall be provided in the cab.

17. STANDARD REQUIREMENTS: The unit shall be complete with all standard equipment and accessories customarily furnished and shall comply with OSHA Standard 1926.601, Motor Vehicles. Two body safety props, one on each side, shall be provided and shall be operable without requiring the operator to reach inside the hoist frame.

18. OPTIONAL EQUIPMENT AND SERVICES: When required during the contract term, the following optional equipment and services shall be furnished:

18.1 Dump bodies and associated hardware installations may be required.

18.2 Optional additions, deletions, and substitutions to the body and hoist equipment may be required in accordance with the special conditions of the bid invitation.

18.3 A hydraulic and control system capable of raising and lowering the dump body;

latching and unlatching the tailgate; opening and closing the tarp; raising, lowering, and rotating a snowplow; and operating a salt spreader and brine sprayer shall be provided. The system shall include an in-cab controller with adjustable pedestal, multifunction valve manifold, variable-volume load-sense piston pump, return filter, high-pressure filter, hydraulic reservoir with sight gauge, and all hoses, fittings, clamps, cables, connectors, brackets, and hardware necessary for installation.

18.3.1 Variable-displacement (load-sense) front-mounted piston pump.

18.3.2 Driveline kit for front-mounted pump.

18.3.3 Pump shutoff valve and override control.

18.3.4 Pressure filter.

18.3.5 Reservoir with sight gauge, breather cap, return filter, magnetic drain plug, and low-oil/high-temperature sensor

18.3.6 Air-operated hydraulic add-a-fold valve for hoist, plow lift, and plow angle functions, and electronic proportional valves for auger and spinner functions.

18.3.7 Pressure sensor in the plow-lift circuit for integration with

AVL/GPS.

18.3.8 Electric power amplifier for electric pre-wet operation.

18.3.9 Upright, behind-the-cab valve enclosure.

18.3.10 Closed-loop controller for auger, spinner, pre-wet, and direct-liquid applications.

18.3.11 In-cab air controls mounted in an adjustable base tower.

18.3.12 Pneumatic filter, lubricator, and regulator.

18.3.13 Pneumatic protection valve.

18.4 AVL ARC sensor system.

18.4.1 AVL device.

18.4.2 Harnesses for spreader-control connections.

18.4.3 Input harness.

18.4.4 Antenna.

18.4.5 Wireless air and road-condition sensor.

18.5 Flat-hook ratchet tie-downs with long, wide handles

shall be furnished in a quantity equal to the number of tie-down brackets.

19. TRUCK CHASSIS-CAB: The body and hoist shall be furnished for installation by the

South Carolina Department of Transportation. When optional installation is required, the successful bidder shall take delivery of the Department’s truck from the Equipment Depot, transport it to the bidder’s facility, perform the installation, and return the completed vehicle, assuming full responsibility and liability during transport.

19.1 Typical chassis-cab applications are:

6½-cu-yd body: current-model-year Mack Granite with 96-inch CA and Allison 3000 RDS transmission, or approved equal.

12-cu-yd body: current-model-year Mack Granite with 112-inch CT and Allison 3500 RDS transmission, or approved equal.

16-cu-yd body: current-model-year Mack Granite with 165-inch CT and Allison 3500 RDS transmission, or approved equal.

20. SERIAL NUMBER: Each unit shall bear a permanently affixed manufacturer’s serial number that is unique, readily identifiable, and suitable for recall, recovery, ownership, and service purposes.

21. COLOR: The unit shall be painted or powder-coated gloss black (or the manufacturer’s standard equivalent). All surfaces shall be properly cleaned and prepared to promote adhesion and corrosion resistance. Identification plates and warning labels shall be protected from overspray.

21.1 The complete coating system shall provide corrosion resistance suitable for heavy-duty highway and off-road service. Required warning, safety, instructional, and identification decals shall be furnished; vendor or dealer advertising shall not be permitted.

22. WARRANTY: The unit shall be warranted against defects in materials and workmanship for not less than twelve (12) months from the in-service date established by the Department.

Warranty, claim procedures and documentation shall be furnished with the bid.

23. SERVICE LITERATURE: An illustrated parts book and installation manual shall accompany each body and hoist. Electronic media are preferred when available. Two additional copies shall be furnished to the Director of Supply and Equipment with the initial delivery.

24. SALES LITERATURE, SPECIFICATIONS, AND QUESTIONNAIRE: Bidders shall furnish complete sales literature, specifications, and a completed questionnaire with the bid.

Any deviations from these specifications shall be clearly identified on separate attached sheets.

25. PILOT MODEL: A pilot body and hoist shall be furnished for evaluation by the Department. Approved changes resulting from the pilot installation shall apply to all subsequent production units.

26. GENERAL: The body and hoist shall be of current design and production and shall operate satisfactorily with the specified truck chassis. The Department reserves the right to reject any bid proposing equipment deemed unsuitable.

27. PACKAGING: Components for each body shall be packaged by individual unit. Bulk packaging of components is not acceptable.