New LOGO 12 semi-trailer for round timber: the long-distance runner with off-road genes

• DOLL TimTech has launched the LOGO 12 semi-trailer for round timber, designed for both long-distance transport and off-road conditions.

• The LOGO 12 features an intelligent frame structure that combines maximum off-road mobility with a minimum tare weight, making it up to 15% lighter than its predecessor.

• The semi-trailer is constructed from high-strength fine-grained steel and is available in a weight of 5.3 tons, suitable for timber lengths between 2 and 14 meters.

• Enhanced frame construction with reinforced main beams improves off-road performance, ride comfort, and handling, using FEM simulations for optimization.

• The redesigned front wall with bolted supports increases stability and reduces vibration, crucial for absorbing shocks during timber transport.

• The LOGO 12 has received Europe-wide certification, simplifying the registration process, and is available for order with customizable configurations and rapid delivery options.

DOLL TimTech, a leading manufacturer of timber transport solutions, has unveiled the LOGO 12, a newly developed semi-trailer for round timber. Thanks to its intelligent frame structure, the semi-trailer combines maximum off-road mobility with minimum tare weight. The LOGO 12 thus meets the growing demands of the timber transport industry for ever higher payloads. The semi-trailer is designed for timber lengths between 2 and 14 meters and ensures economical long-distance transport.

“The new LOGO 12 semi-trailer is much more than just a facelift,” says Daniel Spinner, Product Manager at DOLL TimTech. “We have rethought the entire vehicle concept and scrutinized every component, every connection, and every load situation down to the last detail. The result is a vehicle tailored to long-distance transportation, but which also shows its strengths in difficult terrain.” The semi-trailer is made of high-strength and durable fine-grained steel and has a low tare weight. Depending on the configuration, the vehicle is available from a weight of 5.3 tons and is therefore up to 15 percent lighter than its predecessor.

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When redesigning the LOGO 12, DOLL paid particular attention to the frame construction. On rugged forest tracks riddled with deep potholes, in ruts and hairpin bends, and during tight turning maneuvers, the chassis is subjected to immense torsional stress. The two main beams of the frame were therefore additionally reinforced in the middle to absorb these stresses. FEM simulations were used to predict material behavior and load peaks in advance, enabling targeted optimization of the trailer during development. The reinforcement not only enhances off-road performance on challenging terrain, but also improves ride comfort, directional stability, and on-road handling. “The LOGO 12 proves that rugged durability, off-road capability, and lightweight design can go hand in hand,” says Stephan Gerber, Head of Development for Timber Vehicles at DOLL TimTech. “Innovative component geometries allow reduced sheet thickness at non-critical points and use of thicker material only where it is necessary.”

In addition to the frame construction, the DOLL engineers also redesigned the front wall completely. The four front wall supports are now bolted directly to the frame. The new, reinforced connection delivers greater stability and reduces vibration in the approx. 2.5 meter high component, especially off-road. “Hardly any other component is subjected to greater stress during timber transport than the front wall,” explains Gerber. “It has to absorb shocks during loading and withstand constant vibrations on forest roads.”

The new semi-trailer has been fully approved through a Europe-wide certification process. The Certificate of Conformity (COC) contains all technical data relevant for registration. This document allows registration without individual approval, which significantly speeds up and simplifies the registration process, meaning the vehicle can start work in the forest more quickly. The new LOGO 12 semi-trailer is now available to order and can be individually configured according to customer requirements – including variable floor solutions, load-securing components, and bolt-on options such as additional supports or steps. The trailer will also be available from the end of the year as part of the DOLL rapid series, which offers pre-manufactured vehicles with delivery within a few weeks.