Abstract: A reinforcing track for soft ground comprises two rows of pressed sheet metal rib members 1. The inner ends of corresponding rib members 1 in the two rows are articulated to connecting rods 5 near their lower, pointed edges. Longitudinal ties 2 and 8 and transverse ties 3 all of spring steel strip reinforce a plastics sheet covering 7 which together with the ties 2 and 3 are sandwiched between track plates 9 and flanges on the rib members 1. The track is flexible and can be reeled onto, and unreeled from a reel on a vehicle for recovery of and laying the track. The reel is carried by a frame supported on a turntable bearing on the vehicle chassis.

Abstract: Apparatus for forming bends in the sheet material and including a bending unit with a fixed frame, female holding means for clamping the sheet in a vertical alignment, mobile tables for bending the sheet, which tables rotate on an axis parallel to the longitudinal axis of the apparatus on respective intermediary supports. Each intermediary support is independently moveable on the fixed frame from one position corresponding to a retracted position of the table to a second position which is a working position of the table. The intermediary supports and tables are independently operable.