Abstract: A construction unit (10) which is suitable for use in the fabrication of a stair stringer is provided. In one embodiment, the unit has three side members (12, 14, 16) which form a right triangle. The side member (16) forming the hypotenuse of the right triangle has a flat surface for locating the unit (10) against a flat support surface. The side members (12, 14) forming the other two sides of the right triangle are provided with channels (22) extending along their lengths, each for receiving the edge of a stair tread (28) or stair riser (30) forming sheet therein.

Abstract: A stake (10, 80) is provided which can be used for edging gardens and lawns or for the formation of forms for concrete foundations and slabs. The stake (10, 80) is moulded from a synthetic plastic material and comprises a leading end (12) which is tapered for penetrating the ground and a trailing end (14) which is provided with a beam-receiving formation (16) thereon for receiving a beam therein. The beam receiving formation comprises at least one pair of planar side members (18, 20) which are spaced from one another. A plurality of the stakes can be provided as a garden edging kit or a concrete formwork kit.