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Forests 2017, 8(11), 456;

Incidence of Trailer Frame Structure on Driver’s Safety during Log Transportation

Department of Agricultural, Forest and Food Sciences, University of Torino, Largo Paolo Braccini, 2, 10095 Grugliasco, Italy
Author to whom correspondence should be addressed.
Received: 29 September 2017 / Revised: 9 November 2017 / Accepted: 11 November 2017 / Published: 18 November 2017
(This article belongs to the Special Issue Forest Operations, Engineering and Management)
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The frame structure of the trailer may influence both the traction and the tractor-trailer stability, especially along sloped paths. The aim of this research was to analyze a trailer overturning and the strains on the connected tractors (wheeled, or crawled) during log transportation (loose or tied) along a hillside. Two two-axle trailers were used: tandem and turntable steering. Three types of measurements were carried out during the field tests: (i) the detachment from the ground of the rear upstream wheels (or crawler); (ii) the transversal and longitudinal strains occurring when the trailer overturned (and released the hooking system of the tractor); (iii) the lateral deviation of the rear wheels (or crawler) of the tractor. The study highlighted that the two-axle trailer with turntable steering combined with the crawl tractor gave better results in terms of safety during trailer overturning. In addition, independent of the type of trailer, a tied load was found to be more dangerous than a load restrained only by steel struts, because when overturning, the load forms a single unit with the trailer mass which increases the strains. View Full-Text
Keywords: frame structure; two-axle trailer; crawl tractor; wheel tractor; safety frame structure; two-axle trailer; crawl tractor; wheel tractor; safety

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Manzone, M.; Calvo, A. Incidence of Trailer Frame Structure on Driver’s Safety during Log Transportation. Forests 2017, 8, 456.

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