Abstract: Means for releasably connecting two constructional panels to one another comprising first and second parts, wherein: the first part has a bolt; and the second part has an enclosure with an opening into which the bolt of the first part can be moved, a cam rotatable about a pivot within an enclosure between an open position and a locked position, the cam having a slot formed within it adapted to receive a portion of a corresponding bolt of the first part, the slot having a bolt engagement surface with a portion sloped at an angle to the said second dimension, the slot having a locking surface substantially opposite the bolt engagement surface.

Abstract: A connection between substantially planar panels is disclosed. A panel comprises a panel body, said panel body comprising a pair of planar members, deployed in parallel spaced arrangement, and connected by an outer side wall. A connection assembly extends circumferentially from each panel body, with a connection assembly including a planar connection surface for engaging in a plane a corresponding connection surface on a second panel. The planar connection surface and the side wall defining an acute angle, wherein said plane is at an angle of 2°-8° to the plane of the panel bodies.

Abstract: A surface panel is disclosed, the panel comprising two planar members in parallel spaced arrangement and being joined together by a plurality of mutually parallel tubular cells. Each tubular cell defines with the planar members an isolated cell volume. A tubular cell wall can be contiguously arranged with a neighbouring cell and also share a dividing wall with said cell. Preferably a tubular cell has a hexagonal shape with the cells forming a honeycomb array. A planar member optionally comprises a surface which further comprises a plurality of ribs arranged in a hexagonal configuration, with the diameter of each said hexagonal tubular cell being larger than the diameter of each said hexagonal rib configuration of said first planar member.

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.