No he conseguido descubrir cómo se llama este tipo de vehículo en español, pero he aquí algunos indicios:
"A crib style log hauling vehicle is described as lengthwise loaded logs with lateral securement (bunks) and both a front and rear gate that would prevent longitudinal shifting of the logs. Figures 5-15 and 5-16 are examples of two crib style vehicles."
Más detalles y cuatro ilustraciones en págs. 58-61.
http://www.michiganltap.org/pubs/MDOTsec363_152488_7-Log_Tru...
"A new design to the log truck and trailer, called cribbing, has resulted since the accident in 1998. Crib trucks and trailers promote the hauling of logs lengthwise, rather than the traditional crosshauled, so the ends of the logs are perpendicular to the cab of the vehicle, providing greater stability. In a crib truck, the sides of the log-hauling truck are staked, generally a minimum of two stakes on each side of the vehicle per tier of logs, and the truck is fitted with headboards and bulkheads at the front and back of the trailer, forming a kind of cage."
http://www.timbermen.org/positiontestimony/cribtruckposition...
Otra foto de un crib trailer o bunk trailer:
http://savagetrailersinc.com/
The translation workplace 
peer agreement (net): +2
