3 Axle U Shape Rock Body End Dump Semi Trailer

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.

3 axle U shape rock body end dump semi trailer side profile

HUAYU U shape rock body tipper rear view with HYVA cylinder

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.

HYVA front telescopic cylinder with CHENGSHAN 13R22.5 tire close-up

Spare tire mounts and HYVA cylinder rear view

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.

ROCKY 450 Baosteel badge on corrugated sidewall

Multi-leaf spring suspension with wiring harness

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.

JOST king pin plate with Philips 7N socket and air couplings

Double-speed JOST landing gear under chassis

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.

Is the price FOB or CIF?

Quoted $21,500 is FOB Qingdao, China. CIF to your port adds shipping, insurance, and port charges, typically $1,800-$3,200 depending on destination. Tell us your destination port and we will send a CIF quote the same day.

What is the lead time?

20-25 working days from order confirmation for standard specification. Longer for custom colors, non-standard axle upgrades, or 40 m³ volume with air suspension. Shipping to Africa typically takes another 30-45 days depending on shipping route and destination port.

Can I choose BPW axles instead of FUWA?

Yes. BPW axles add about $600 per unit 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?

1-year warranty on the main beam, body structure, and welded joints. Component warranties follow the original manufacturer's terms (HYVA, FUWA, WABCO, JOST). Full warranty terms are shared during order confirmation.

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For a full quote including CIF shipping to your port, send us the destination country and preferred volume (30 / 35 / 40 m³). 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.