Abstract: An electrically insulated trellis comprises a first array of parallel tubular members 2 and a second array of parallel tubular members 4. Each of the second array of parallel tubular members 4 is pivotably connected to a plurality of the first array of parallel tubular members 2 whereby to form a trellis 1. Each of the tubular members is formed from glass-reinforced polymer. A first set of fibres in the glass-reinforced polymer are substantially parallel and aligned in a first direction and a second set of fibres in the glass-reinforced polymer, distinct from the first set, are substantially parallel and aligned in a second direction different to the first direction.

Abstract: A support apparatus 1 for supporting a user in an elevated working position above a ground surface G comprises a frame 60 for supporting a floor portion 20 of the support apparatus and a plurality of leg members 40a, 40b mounted to the frame 60 for supporting the frame above the ground surface G. Each leg member has a foot portion 42 for engaging the ground surface G. Each leg member is rotatably mounted to the frame for rotation about a rotational axis which is substantially perpendicular to the width and the length of the frame and each leg member extends from the frame in a radial direction of the rotational axis, whereby the foot portion is offset from the rotational axis.

Abstract: There is provided a railing post adaptor for a roof support apparatus. The roof support apparatus comprises an elongate member having a plurality of longitudinal sides. The railing post adaptor comprises a roof support apparatus connector for securing the railing post adaptor to the roof support apparatus. The roof support apparatus connector comprises a first connection portion arranged to engage, in use, with a first set of the plurality of longitudinal sides, and a second connection portion, movably mounted to the first connection portion and arranged to engage, in use, with a second set of the plurality of longitudinal sides, the second set being different from the first set. The roof support apparatus connector further comprises a railing connection portion extending from the roof support apparatus connector for detachably securing a proximal end of a railing post to the roof support apparatus via the railing post adaptor. The first set and the second set each comprise at least two longitudinal sides.

Abstract: A cover for covering an opening defined in a surface, the opening defined between a first edge and a second edge, and defining an opening width therebetween, shorter than a length of the opening, the cover having a cover width and configured to be supported, in use, at the first edge and the second edge of the opening when the cover width is parallel to the opening width, wherein the cover width is adjustable from a first cover width to a second cover width, and wherein the cover is configured to maintain the cover width at the second cover width, in use.

Abstract: A support apparatus 1 for supporting a user in an elevated working position above a ground surface G comprises a frame 60 for supporting a floor portion 20 of the support apparatus and a plurality of leg members 40a, 40b mounted to the frame 60 for supporting the frame above the ground surface G. Each leg member has a foot portion 42 for engaging the ground surface G. Each leg member is rotatably mounted to the frame for rotation about a rotational axis which is substantially perpendicular to the width and the length of the frame and each leg member extends from the frame in a radial direction of the rotational axis, whereby the foot portion is offset from the rotational axis.

Abstract: An electrically insulated trellis comprises a first array of parallel tubular members 2 and a second array of parallel tubular members 4. Each of the second array of parallel tubular members 4 is pivotably connected to a plurality of the first array of parallel tubular members 2 whereby to form a trellis 1. Each of the tubular members is formed from glass-reinforced polymer. A first set of fibres in the glass-reinforced polymer are substantially parallel and aligned in a first direction and a second set of fibres in the glass-reinforced polymer, distinct from the first set, are substantially parallel and aligned in a second direction different to the first direction.

Abstract: There is provided a railing post adaptor for a roof support apparatus. The roof support apparatus comprises an elongate member having a plurality of longitudinal sides. The railing post adaptor comprises a roof support apparatus connector for securing the railing post adaptor to the roof support apparatus. The roof support apparatus connector comprises a first connection portion arranged to engage, in use, with a first set of the plurality of longitudinal sides, and a second connection portion, movably mounted to the first connection portion and arranged to engage, in use, with a second set of the plurality of longitudinal sides, the second set being different from the first set. The roof support apparatus connector further comprises a railing connection portion extending from the roof support apparatus connector for detachably securing a proximal end of a railing post to the roof support apparatus via the railing post adaptor. The first set and the second set each comprise at least two longitudinal sides.

Abstract: An access panel for a horizontal opening, the access panel (11) comprises a parallel array (12) of members (14, 15, 16) and a lateral extent (W) of the array (12) corresponding to a lateral extend (D) of the opening between first (17) and second (18) end members of the array (12) defining a length (L) of the panel (12). At least two pantograph units (20, 21) extend between the first (17) and second (18) end members and each member (14-16, etc.) in the parallel array (12) is pivotably linked to each pantograph unit. The members (14, 15, 16 etc) and units (20, 21) permit the panel (11) to function as a planar structure and enable the length (L) of the panel (11) to be varied between a minimum length (L1) and a maximum length (L2) and an intermediate configuration having a length between the minimum and maximum lengths (L1, L2).

Abstract: A retractable cover for use over an opening such as a swimming pool is described. The cover comprises a number i (i?3) of supporting joist means, each joist having a top and bottom surface; an even number j (j<i) of floor section means, each having a first and second end; the first end of a 1st floor section being pivotally fixed to the top surface of a 1st joist, and the first end of the jth floor section pivotally being fixed to the top surface of the ith joist, the first ends of the 2nd . . .

Abstract: A retractable cover for use over an opening such as a swimming pool is described. The cover comprises a number i (i?3) of supporting joist means, each joist having a top and bottom surface; an even number j (j<i) of floor section means, each having a first and second end; the first end of a 1st floor section being pivotally fixed to the top surface of a 1st joist, and the first end of the jth floor section pivotally being fixed to the top surface of the ith joist, the first ends of the 2nd . . .

Abstract: An access panel for use in conjunction with a horizontal opening; recesses (41, 42) incorporated in the sides of longitudinal edges of the horizontal opening the access panel (11) comprising a parallel array (12) of members (14, 15, 16) with a longitudinal axis; the lateral extent (W) of the array (12) corresponding to a lateral extent (D) of the opening and first (17) and second (18) end members of the array (12) defining a length (L) of the panel (12) characterised by at least two pantograph units (20, 21) extending between the first (17) and second (18) end members; each member (14 16, etc) in the parallel array (12) being pivotably linked to each pantograph unit; the combination of members (14, 15, 16 etc) and units (20, 21) providing for the panel (11) to function as a planar structure and enabling the (L) of the panel (11) to be varied between a first configuration wherein the panel has a minimum length (L1) measured between the first (17) and second (18) end members; a second configuration wherein the

Abstract: A constructional unit comprising: a support frame which is O-shaped in plan bounding an open central region, the support frame including first and second members which are each U-shaped in plan, each member being in the form of a base frame from which extend two side arms; the first and second members having their side arms telescopically engaged to define sides to the open central region of the O-shaped support frame; the telescopic engagement providing for—the spacing of the first base frame from the second base frame to be adjustable over a range of distance; and the temporary securing of the first member to the second member at a predetermined spacing; the base frame of the first member being adapted for location at a first level at a first working location; the second member being adapted, at a position remote from the first member, for location at a second level at a second working location by way of at least one leg pivotably attached at or near one end of the, or each, leg to the base frame of the sec

Abstract: A safety unit (11) in the form of a network or mesh for location across an opening to receive and restrain an object falling into the opening. The network or mesh is a trellis (12) comprising: a first array (13) of parallel rigid members (13A); a second array (14) of parallel rigid members (14A); and pivoting mechanism whereby each member (13A) of the first array (13) is pivotably attached to at least some of the members (14A) of the second array (14) so that the first and second array can be pivoted relative to one another between a first housed, configuration wherein the difference between the width (W′) of the trellis (12) and the length (L′) of the trellis (12) tends to a maximum; and a second, opened, configuration wherein the difference between the width (W) of the trellis (12) and the length (L) of the trellis (12) tends to a minimum.