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HUAYU 3 axle U-shape rock body end dump semi trailer with Baosteel ROCKY 450 wear-resistant steel, HYVA front cylinder, and 35 cbm capacity for quarry, mining, and aggregate haul.
The HUAYU 3 axle U shape rock body end dump semi trailer pairs a Baosteel ROCKY 450 wear-plate cargo body with a HYVA front-mount telescopic cylinder for heavy-duty quarry, mine, and aggregate work. Where standard Q345 dump trailers develop floor gouges and weld cracks after a season of rock loading, ROCKY 450 (HB 450 hardness, equivalent to Hardox 450) resists impact and abrasion from granite, basalt, and ore chunks, so the body outlasts the chassis on rough site work.
Why the U-Shape Rock Body Matters
A flat-floor or square-shape dump trailer holds material in the corners. Wet sand bridges, coal clumps, and crushed rock jam at the sidewall-to-floor joint. The U-shape rock body uses a rounded floor-to-wall transition so loads slide out cleanly on every tip cycle. Drivers spend less time tapping the body with a hammer or shovel to clear residue, and the one-piece wear plate construction removes the internal corner welds that typically crack first under repeated tipping stress. For quarry operations running 8-12 cycles per day, that adds up to real uptime savings.
The body panels are stamped from a single sheet of Baosteel ROCKY 450 on each side, with no segmented welding inside the cargo zone. Outside reinforcement ribs run horizontally along the sidewall (visible in the detail images) to keep the shell stiff when loaded, and the top-front edge is folded over for rollover protection during over-filling at the loader.
HYVA Front-Mount Telescopic Hydraulic Cylinder
A 5-stage HYVA cylinder sits centered on the front bulkhead, with the red ram visible from the rear when the body is raised. HYVA is the industry reference for dump-trailer hydraulics. Parts and seal kits are stocked by distributors across Africa, Central Asia, and the Middle East, which matters far more than cylinder specs on a 10-year asset. The cylinder mounts directly to the heavy box section on the front of the chassis, with reinforced pivot pins and a locking valve to prevent uncommanded descent.
Typical full-tip time is around 25-30 seconds at idle pump speed, fast enough that the driver rarely has to idle long at the dump face, reducing time-per-cycle on busy quarry stockpiles. The cylinder's protective sleeve (wrapped for transit in the photos) stays on for the first delivery phase and is removed before commissioning.
Chassis, Suspension, and Running Gear
The main beam is Q345B high-tensile steel with a 500 mm web and reinforced neck area where the cylinder pivot loads transfer into the chassis. Three FUWA 13-ton axles sit on heavy-duty mechanical multi-leaf spring suspension — the multi-leaf pack is deliberately chosen over air suspension for rock-hauling duty because the mechanical system tolerates the overload spikes that happen when an excavator drops a full bucket of granite into the body from 2 metres up. Air suspension is better for fragile cargo and highway comfort; leaf spring is what mines and quarries actually use.
Tires are 13R22.5 CHENGSHAN CST27 with a deep lug pattern suited to unpaved quarry and mine-access roads. Twelve tires total: ten on the ground plus two spares mounted on the rear carrier between the HYVA cylinder and the chassis rails. Steel disc rims, standard 9.00-22.5 spec. BPW axle upgrades are available on request, along with air suspension if the load profile shifts toward on-highway bulk delivery.
Coupling, Brakes, and Electrical
The king pin plate carries a standard 90# JOST traction pin (2 inch or 3.5 inch on request), with a Philips 7N ABS socket and dual-line palm couplings for brake and auxiliary air. WABCO ABS is standard. The modulator valve is positioned forward of the first axle so service access is simple with the body down. The JOST 28T double-speed landing gear supports the trailer during coupling and uncoupling, and its fast-screw gear drops the legs quickly after tip operations.
Factory Speed Rating and Safety Labels
The factory decals on the cab front read 40 km/h maximum laden, 25 km/h unladen, 30 km/h on turns. These are engineered limits for a loaded 50-ton U-shape body, and the high-visibility amber/red color bar across the rear bumper keeps the trailer visible at job-site speeds. The rear corners carry twin tail-lamp clusters protected by welded steel guards, and the side-marker reflective strips meet ECE R48 for night operation on public roads.
Typical Applications
This trailer is built for jobs where standard tippers develop floor cracks within a season:
Granite and basalt quarry hauling — crushed and uncrushed stone from pit to stockpile
Open-pit coal transport — short-haul runs from face to crusher or rail siding
Iron ore and copper ore — wear-plate body resists abrasion from mineral concentrate
Construction aggregate — crushed rock, sand, and gravel to batch plants or road projects
Demolition waste — broken concrete and reinforcing steel without floor damage
For lighter jobs (crushed cement, soil, finish gravel, wheat), the 3 axles square shape rear dump trailer is a more cost-effective option. For lower-tonnage light-duty use, see the 2 axle end dump tipper semi trailer. Browse the full tipper trailer lineup for side-tippers, 4-axle heavy variants, and high-sided coal haulers.
Frequently Asked Questions
What is Baosteel ROCKY 450 and how does it compare to Hardox 450?
ROCKY 450 is Baosteel's proprietary high-hardness wear-resistant plate, specified at HB 450 surface hardness, the same hardness class as Hardox 450 from SSAB. In independent abrasion testing the two grades perform within a narrow margin for quarry and mining aggregate applications. ROCKY 450 is produced in China with full traceability and is widely available for replacement panels, which matters if you plan to re-sheet the body after several years of service.
How many cubic meters does the body hold?
Standard build is 35 m³. The same chassis supports 30 m³ (shorter body for denser loads like iron ore) or 40 m³ (taller side walls for lighter aggregate at volume). Tell us the typical material density and we will recommend the right volume. A 40 m³ body filled with wet sand will exceed the axle rating long before it fills up.
What is the maximum payload?
The 3-axle configuration with 13T FUWA axles gives a 50-ton payload rating on paved roads. With optional 16T FUWA axles the rating increases to 60 tons for off-road / site-use only. Gross vehicle weight should not exceed the road limit in your country of operation.
Can I choose BPW axles instead of FUWA?
Yes. BPW axles carry a per-unit premium over FUWA and extend service intervals for high-mileage operators. FUWA is the default because it has the widest parts network in HUAYU's primary export markets.
Does the trailer come with ABS?
Yes. WABCO dual-line ABS is standard. This meets most export-market requirements including ECE R13, EN 12642, and GCC compliance for Gulf Council countries.
What warranty do you offer?
10-year warranty on the main beam, with a 1-year warranty on the body structure and welded joints. Component warranties follow the original manufacturer's terms (HYVA, FUWA, WABCO, JOST).
For a full quote on your preferred volume (30 / 35 / 40 m³), send us the destination country and any custom requirements. The HUAYU sales team replies within 24 hours on working days. Visit our contact page or send a WhatsApp message directly from any page on the site.
Dimensions: 10500mm x 2500mm x 3600mm (customizable)
Body Shape: U-shape rock body, one-piece wear-plate floor
Body Material: Baosteel ROCKY 450 high-hardness wear-resistant steel (HB 450)
Main Beam: Q345B high-tensile steel, 500mm web
Volume: 30 cbm / 35 cbm / 40 cbm
Load Capacity: 50-60 ton payload
Hydraulic Cylinder: HYVA front-mount telescopic, 5-stage
Axles: 3 x 13T FUWA (16T / 20T optional) or BPW
Suspension: Heavy-duty mechanical multi-leaf spring
Tires: 13R22.5 CHENGSHAN CST27, 12 tires (including spares)
Wheel Rim: 9.00-22.5 steel disc
King Pin: 90# / 2 inch or 3.5 inch JOST
Landing Gear: 28T JOST double-speed
Brake System: WABCO dual-line ABS, air brake
Electrical: Philips 7N socket, 24V LED tail lamps
Speed Limit Labels: 40 km/h laden, 25 km/h unladen, 30 km/h turning