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En cherchant un camion Mack CH, de la 1ère Guerre Mondiale, sur la toile, je suis tombé là-dessus : Système D !
Le chemin de bois, descendait de la montagne, sur des dizaines de Kms...!!!
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There were several types of roads used in the early days of truck logging. In dry weather a cleared dirt path might suffice. But for year-round travel a more substantial road was needed. Three types of roads were most favored and all were made of wood (See Appendix C). A “cross-plank” road (Figure 1.2) was made of sawn timbers spiked to hewn log stringers. A “fore and aft” pole road was constructed of hemlock poles that were available in the woods. Trucks operating on pole roads were fitted with steel flange wheels (Figure 1.3). For greater permanence in applications where a large volume of logs was to be hauled, a “fore and aft” plank road could also be constructed (Figure 1.1). All used considerable amounts of wood with the fore and aft plank requiring the most; about 160,000 board feet per mile (Knapp 1921). In the early 1920s on good roads with favorable grades, logging trucks traveled at rate of speed of 10 to 12 miles per hour. The maximum haul distance was generally limited to 15 miles (Bryant 1923). A new log truck could be purchased for about $4000 and was expected to last four years (Knapp 1921).
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