Abstract: A low profile air cushion loading platform is provided with a driving and steering device comprising a plurality of laterally spaced steering boxes located under the platform. Each steering box includes a plurality of wheel members adapted to be driven by motors about horizontal axes of rotation, with the wheel members and their driving motors being located within a ball race and rotatable with said ball race as a unit about a vertical axis. The ball race has gear teeth which cooperate with a driving gear operated by an electrohydraulic steering system to rotate the ball races of different ones of the steering boxes through different angles respectively during the steering operation, to cause the wheel members of all the steering boxes to be driven along arcs having a common center of curvature.

Abstract: A truck adapted to stow, stack, etc., large containers comprises a chassis including a pair of substantially parallel cross beams extending in spaced relation to one another from a pair of elongated longitudinal beams which cooperate with the cross beams to provide a chassis of substantially C-configuration in horizontal cross section. The longitudinal beams are of telescopic construction with the parts thereof being selectively displaceable to vary the effective length of the longitudinal beams thereby to vary the spacing between the cross beams. The cross beams in turn are associated with vertically oriented telescopic support legs having support wheels at their lower ends which may be selectively displaced for steering purposes by means of associated electric servos.