Curtain Side Semi-Trailer – The Flexible Freight Carrier

Combining the open accessibility of a flatbed with the all-weather protection of an enclosed van

Product Overview

Prime Mover Industries presents its Curtain Side Semi-Trailer – a versatile freight transport solution that delivers the best of both worlds. Also known as a curtain-sider or tautliner, this trailer features flexible, retractable side curtains made of durable, weather-resistant material instead of rigid solid walls. The curtains run on top and bottom rails and can be easily pulled back and forth for full side access to the cargo area.

The curtain side semi-trailer combines the advantages of a flatbed with the covering and containment benefits of an enclosed trailer. The compartment is completely enclosed and protected against rain and dust, providing all-day protection for cargo. When it’s time to load or unload, the side curtains can be opened completely, providing a wide opening for forklifts or other loading equipment to access the cargo area from both sides simultaneously.

This design makes the curtain side trailer an indispensable tool for freight forwarding, logistics, and retail trading operations that require fast turnaround times and flexible cargo handling.

Key Specifications

Parameter	Specification
Overall Length	12,500 – 13,750 mm (customizable)
Overall Width	2,500 – 2,550 mm
Overall Height	3,500 – 4,000 mm
Compartment Volume	85 – 100 m³
Number of Axles	3 (standard)
Axle Capacity	3 × 13 tons
Max. Payload	40 – 50 tons
Tare Weight	Approx. 6,500 – 7,600 kg
Main Beam Material	High-strength steel I-beam, 500mm height
Top Flange	14mm
Cross Beam	160mm
Curtain Material	Heavy-duty PVC-coated fabric or reinforced tarpaulin (weather/UV-resistant)
Curtain Operation	Manual or electric
Suspension	Mechanical leaf spring (standard) – Air suspension optional
Axle Brand	FUWA / BPW / customer-specified
Tires	12R22.5 (12 pcs)
King Pin	JOST, 2″ or 3.5″
Brake System	WABCO dual-line pneumatic air brake
Certifications	ISO 9001, CCC, CE

Design & Construction Features

Flexible Curtain System

The defining feature of this trailer is its retractable side curtain system. Heavy-duty PVC-coated fabric or reinforced tarpaulin curtains run on top and bottom guide rails, allowing them to be pulled open or closed with ease. The curtains are weather-resistant and UV-protected, ensuring cargo stays dry and secure in all conditions.

High-Strength Steel Chassis

The chassis is built with high-strength steel I-beams featuring a 500mm main beam height and a 14mm top flange. Cross beams at 160mm spacing provide exceptional structural integrity while maintaining a lightweight design.

Lightweight Construction

The combination of aluminum alloy components and curtain fabric achieves a lightweight design that reduces the trailer‘s self-weight, enhancing payload capacity and fuel efficiency. Some configurations achieve a box weight as low as 3,500kg for a 15-meter box.

Weatherproof Protection

When the curtains are closed, the compartment is completely enclosed, protecting cargo from rain, dust, and the elements. This provides all-weather protection equivalent to a dry van trailer.

Application Fields

The Curtain Side Semi-Trailer serves a wide range of industries and cargo types:

Industry	Typical Cargo
Logistics & Freight Forwarding	Palletized goods, boxed cargo, general freight
Construction	Steel profiles, wooden beams, prefabricated elements
Retail & Distribution	Consumer goods, retail merchandise
Manufacturing	Machinery, delicate manufacturing components
Building Materials	Raw lumber, construction materials
Automotive	Expensive automobiles and auto parts

Key Advantages

Fast Loading & Unloading – Up to 50% Faster

The curtain side trailer can be loaded and unloaded from both sides simultaneously, dramatically reducing turnaround time. Forklifts can access the cargo area directly from the side, eliminating the need to maneuver inside a confined space. Loading and unloading can be completed in as little as 30 minutes.

Flatbed Accessibility with Van Protection

The curtain side trailer combines the easy side-loading of a flatbed with the weather protection of an enclosed van. This unique combination makes it one of the most versatile trailer types available.

Lighter Than Rigid Vans – More Payload, Less Fuel

The lightweight curtain and aluminum construction reduce the trailer’s tare weight compared to rigid box vans. This translates to higher payload capacity and improved fuel efficiency – directly impacting your bottom line.

Versatile Cargo Handling

Oversized or awkward items that cannot fit through standard rear doors can be easily loaded from the side. The open-side design accommodates crane loading and other specialized handling requirements.

Full Weather Protection

When the curtains are closed, the cargo is fully protected from rain, dust, and UV exposure. This makes the curtain side trailer suitable for transporting sensitive or high-value goods that require protection during transit.

Corrosion Resistant & Durable

The curtain fabric and aluminum components offer superior corrosion resistance compared to all-steel trailers, ensuring a longer service life with lower maintenance requirements.

Customization Options

Prime Mover Industries offers extensive customization to match your specific operational requirements:

• Curtain operation – Manual or electric
• Axle brands – FUWA (standard), BPW, or customer-specified
• Suspension – Mechanical leaf spring (standard) or air suspension
• King pin – 2″ or 3.5″
• Tire specifications – 12R22.5 or 315/80R22.5
• Brake system – Standard dual-line or EBS with ABS
• Roof options – Fixed roof or sliding roof for top loading
• Color – Any RAL code
• Additional features – Toolboxes, spare tire racks, LED lighting