Abstract: A pre-formed structural concrete element for use in the formation of a composite concrete floor of a building or the like, the element comprising: a generally planar base portion having opposing faces; a series of generally parallel spaced apart formations extending from one said faces of the base portion each defining along with an adjacent formation a void space therebetween and wherein the formations terminate in a plateau and have at least a narrow portion and a wide portion between the plateau and the one said faces of the base portion.

Abstract: A canopy assembly (10) comprising a canopy fabric (20) and furling means (40) extending between a pair of supports (30). The furling means (40) runs through the canopy fabric such that the canopy may be unfurled from both sides of the furling means simultaneously. Both free corners (22, 24) of the unfurled canopy are tethered to the ground or posts (50) to provide a taut smooth canopy. The tension in the furling means (40) is adjustable such that it remains substantially straight and taut in a furling condition, and in an erected condition may be relaxed to conform to the curved shape of the canopy.