Abstract: A panel and accompanying method of construction thereof, the panel comprising a first panel element, the first panel element having a substantially planar outer surface, the second, opposite surface having extending therefrom a plurality of paired walls, each pair extending laterally at least partway across the face of the second surface and defining a channel therebetween, a plurality of throughapertures defined in the first panel element, a second panel element having a substantially planar outer surface, and a second, opposite surface having extending therefrom a plurality of paired walls, each pair extending laterally at least partway across the face of the second surface and defining a channel therebetween, the second panel element defining a plurality of throughapertures therethrough, one or more of the throughapertures opening into a tubular element extending from the second surface, a strengthening member located in a channel between paired walls of a panel element.

Abstract: A modular bridging system comprising modules (10) which inter-link to form a deck suitable for use as a buoyant walkway or roadway; and in which the means for causing successive modules to interlink comprises pegs (61; FIG. 6A-6D) which, in use, joint the facing surfaces of adjacent modules allowing the modules a limited relative up-and-down linked movement and, which are readily detachable when the deck is to be dismantled.

Abstract: An anchoring device comprising a shaft, at least part of whose length comprises a tapered portion, with at least one helical flange which runs substantially along the length of said tapered section and an engagement means to allow the device to engage with a lever wherein in use rotation of the lever about the axis of the shaft results in rotation of the device such that the tapered portion and the helical flange co-operate to drive the device into the ground.

Abstract: A constructional panel has a generally rectangular central section and two opposed end sections, each having an isosceles trapezoid part, its short edge conjoined to an edge of the central section and its long edge conjoined to a rectangular part, there being oblique edges extending between the long and short edges. The panel is thus bound by one pair of opposed edges of the central section, the oblique edges of the two end sections, one pair of opposed edges of the rectangular part and a further edge of the rectangular part. opposed to that edge conjoined to the trapezoid part. The panel edges are configured for connection to the corresponding edges of like panels to build up an area of panelling. Projecting tabs from some edges are received in corresponding receptors on opposed edges and having lock arrangements, whereby the interengaged panels may be locked together.

Abstract: Apparatus for assembling a multi-sectional trackway has a plurality of like track sections which can be joined together, in series. Each track section has first and second transverse edges with respect to the length of the trackway, and has a first abutment surface on one transverse edge and a complementary abutment surface on the other transverse edge. The abutment surfaces slidingly interengage directly or indirectly, in the transverse direction, in order to withstand tensile forces along the length of the trackway. The joint is completed by a bridging plate which spans the interengaged abutment surfaces and is bolted in position thereafter to restrain sliding disengagement of the track sections. A security bolt may be employed to hold the bridging plate in position.