Extending Semi-trailer by Carrimore
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ASEMI-TRAILER with a normal length of 26 ft. which can be extended to 40 ft. for thecarriage of Icing self-supporting loads has been added to their standard range by Carrimore SixWheelers, Ltd. Intermediate lengths of 32 ft. 6 in. and 36 ft. are also possible. In all conditions the trailer's capacity is 12 tons. • In effect the semi-trailer is made in two sections, both have a frame, fabricated from rolled steel sections welded together. The main longitudinal, members are 7-in. deep x 3-i-in, wide channel section. These have their flanges facing inwards, and the dimension over the webs in the rear part is 2 ft. 41 in. This is the dimension between the flanges of the longitudinals on the front portion so that the longitudinal members of the rear portion can slide between them.
Cross-members between the front longitudinals are welded to the underside. Those between •the longitudinals on the rear part are located within the flanges.
Vertical location of the members rela
.tive to each other'is by two rollers on each side • of the longitudinals of the rear portion. The rollers are at the front end, spaced 3 ft. apart. The forward rollers register with the bottom flanges of the outer members, the second pair of rollers with the top flanges.
Two smaller rollers, one at each side of the end of the front longitudinals, guide the front section as the unit is shortened. When fully closed, channel members above the spring brackets • restrict any movement of the outer. members. Locating pegs in the rear full-width crossmember of the front section fit into holes in the front member of the rear portion, to prevent relative lateral movement.
Spring loaded locking pegs are Mounted at the rear ends of the outer members. These fit into holes in the inner members, which are spaced to give the four lengths obtainable.