New addition to the Doll TimTech portfolio: The manufacturer of wood transport solutions presents a newly developed round timber semi-trailer called Logo 12.
It is intended to combine off-road capability and minimal tare weight, and also meet the increasing demands of the wood transport industry for ever higher payloads. The trailer is designed for timber lengths between 2 and 14 meters and for economical long-distance transport, it is said.
More than a facelift
“We have completely rethought the entire vehicle concept, questioning every component, every connection, and every load situation in detail. The result is a vehicle tailored for long-distance transport but also shows
its strengths in difficult terrain,” says Daniel Spinner, Product Manager at Doll TimTech.
According to the manufacturer, the semi-trailer is made of high-strength and durable fine-grain steel. Depending on the equipment, the vehicle is available from a weight of 5.3 tonnes - and thus up to 15 percent lighter than its predecessor.
A particular focus during the redevelopment was on the frame construction. The two main beams of the frame were additionally reinforced in the middle, as high torsional forces act on the chassis on uneven forest paths with deep potholes, in ruts and serpentines, or during tight maneuvering.
Material behavior and peak loads
were preliminarily simulated using FEM calculations to optimize the trailer accordingly. This reinforcement is helpful not only in off-road use under difficult track conditions but also on the road, where it ensures comfort, directional stability, and more stable driving behavior.
“Innovative component geometries make it possible to reduce sheet thickness at non-critical points and use stronger material only where it is required,” explains Stephan Gerber, Head of Development for Wood Vehicles at Doll TimTech.
More stable front wall
The front wall was also completely revised, and now the four front wall supports are directly bolted to the frame. The new, reinforced connection provides significantly
more stability and makes the component less susceptible to vibration, especially in terrain.
According to Gerber, hardly any component is subjected to more stress during wood transport than the front wall. During loading, it has to absorb impacts and withstand the constant vibrations on forest paths over the long term.
Optional equipment
The new Logo 12 can be ordered immediately and can be individually configured according to requirements – for example, with variable floor solutions, components for load securing, or bolt-on options such as an additional support or access ladder. It will be available via the Doll rapid series from the end of 2025.
