Special Purpose Semi Trailer

1. Overall Dimensions (mm, retracted state)
- Retracted overall dimension: **13750 × 3000 × 1750 (13.75m ×3.0m ×1.75m)**
- Maximum extended length: **21500mm**, segmented sliding telescopic structure
- Effective deck width: 3000mm; optional widened width of 3200mm
- Kingpin fifth wheel height from ground: **1550mm**
- Wheelbase: 7500+1310+1310mm
- Track width: 1820mm
> Optional: Hydraulic detachable RGN gooseneck version, minimum deck height down to 850mm

2. Weight Parameters
- Tare weight: **10.5 tons (3-axle extendable standard version)**
- Rated payload: **29.5 tons**
- GVWR (Gross Vehicle Weight Rating): **40 tons**
> Multi-axle versions (4-axle /5-axle /multi-line axle) can carry 60~100 tons for wind turbine towers and large modules

3. Main Beam & Telescopic Frame (Q690 high-strength steel for heavy-duty special applications)
- 500mm I-beam, top flange 18mm, web plate 10mm, bottom flange 20mm, automatic submerged arc welding
- Double-layer nested telescopic sub-beams with mechanical locking mechanism, segmented locking to prevent shifting during transit
- Deck: 5mm checkered anti-slip steel plate with multiple heavy-duty lashing lugs pre-installed
- Coating: Sand blasting + epoxy primer + polyurethane topcoat, salt-alkali resistant and suitable for harsh site road conditions

4. Running Gear (Tri-Axle)
1. Axles: 3 pcs FUWA 13-ton axles (BPW optional)
2. Suspension: Heavy-duty mechanical leaf spring suspension, leaf spring 90mm width ×10 pieces; air suspension preferred for wind power and precision oversize cargo
3. Tires: 12 pcs **12R22.5**, steel rims; 1 spare tire
4. Landing Gear: JOST 40-ton heavy-duty two-speed landing gear

5. Special Purpose Mechanisms
1. Telescopic system: Hydraulic + mechanical double locking, electronically controlled extension & retraction; segmented locking after full extension to guarantee structural rigidity
2. Optional hydraulic RGN gooseneck: Hydraulically detachable gooseneck, allowing over-length equipment to be craned onto the deck from the front end
3. Replaceable superstructure options for different special applications:
   - Steel coil trailer: Fitted with V-shaped saddles and anti-slip stoppers to prevent steel coil rolling
   - Log trailer: Front & rear posts plus log clamping locking mechanism
   - High-pressure long-tube cylinder trailer: Frame and cylinder fixing saddles for transporting high-pressure gas tube bundles

6. Towing, Braking & Electrical System (ECE/GCC Export Certification)
- **Kingpin: 3.5 inch (popular for Africa), 2 inch optional, supports CKD packing**
- Braking system: Dual-line air brake, WABCO valve assembly, ABS as standard; dual air reservoirs
- Electrical system: 24V, 7-core ISO socket, LED tail lamps, reflective markings, oversize warning signs

Optional Upgrades
- Hydraulic detachable RGN gooseneck
- Air suspension + lift axle
- Widened deck, double-side widening & extension
- V-type saddles for steel coils / log locking posts / fixing frame for high-pressure gas cylinders
- Tool box, mudguards, oversize warning signs

> Brief differentiation of other special trailers:
> ① Steel coil carrier: V-shaped saddles for anti-rolling, mainly tri-axle, 40-ton capacity
> ② Log trailer: Front and rear liftable posts with log clamping mechanism
> ③ High-pressure long-tube cylinder trailer: Tube bundle frame for high-pressure gas transport with safety explosion-proof valves