A wall bracket for facilitating construction work, as a surface for a person or another load, the wall bracket comprising a plurality of support structures to be fastened to a wall in parallel and at a distance from one another, said wall bracket further comprising working platforms (252, 253) and parallel working platform frames resting on said plurality of said of support structures, said parallel working platform frames settling at a distance from one another for supporting said working platforms (252, 253) comprised by the wall bracket, characterized in that the working platforms (252, 253) are such that each working platform comprises a self-supporting wall (261 to 267, 271 to 277) and that at least an end area of the self-supporting wall is provided with an overlap area for resting on an adjacent working platform (252, 253), and wherein the wall bracket further comprises a fastening arrangement (701, 701a, 1500, 710) for fastening the working platform (252, 253) to the working platform frame, and wherein the fastening arrangement comprises a fastener with a shaft, an opening in the working platform for the shaft of the fastener, an opening in the working platform frame for the shaft of the fastener and, further, a fastening counterpart which in cooperation with the fastener is arranged to fasten the working platform (252, 253) to the working platform frame, and wherein the working platforms (252, 253) are such that each working platform (252, 253) comprises an upper surface and a lower surface, said upper surface comprising adjacent ridges (261 to 267) extending in a longitudinal direction of the working platform, and between the adjacent ridges (261 to 267) of the upper surface there are provided recesses (271 to 277) of the upper surface extending in the longitudinal direction of the working platform, and recesses (261a to 267a) of the lower surface are defined by walls of the ridges (261 to 267) of the upper surface such that the self-supporting wall (261 to 267, 271 to 277) of the working platform (252, 253) forms at each ridge (261 to 267) of the upper surface of the working platform (252, 253) a recess (261a to 267a) of the lower surface of the working platform, and that the self-supporting wall (261 to 267, 271 to 277) of the working platform forms at each recess (271 to 277) of the upper surface a ridge (271a to 277a) of the lower surface of the working platform, and wherein said fastener comprised by the wall bracket comprises at an upper part of its shaft a support member (701b, 701c) which is transverse to the shaft and which, in a fastening position, settles at an edge of one of said recesses (271 to 277) of the upper surface of the working platform (252, 253), against a flank of one of said ridges of the upper surface of the working platform (252, 253). and wherein the wall bracket further comprises a fastening arrangement (701, 701a, 1500, 710) for fastening the working platform (252, 253) to the working platform frame, and wherein the fastening arrangement comprises a fastener with a shaft, an opening in the working platform for the shaft of the fastener, an opening in the working platform frame for the shaft of the fastener and, further, a fastening counterpart which in cooperation with the fastener is arranged to fasten the working platform (252, 253) to the working platform frame, and wherein the working platforms (252, 253) are such that each working platform (252, 253) comprises an upper surface and a lower surface, said upper surface comprising adjacent ridges (261 to 267) extending in a longitudinal direction of the working platform, and between the adjacent ridges (261 to 267) of the upper surface there are provided recesses (271 to 277) of the upper surface extending in the longitudinal direction of the working platform, and recesses (261a to 267a) of the lower surface are defined by walls of the ridges (261 to 267) of the upper surface such that the self-supporting wall (261 to 267, 271 to 277) of the working platform (252, 253) forms at each ridge (261 to 267) of the upper surface of the working platform (252, 253) a recess (261a to 267a) of the lower surface of the working platform, and that the self-supporting wall (261 to 267, 271 to 277) of the working platform forms at each recess (271 to 277) of the upper surface a ridge (271a to 277a) of the lower surface of the working platform, and wherein said fastener comprised by the wall bracket comprises at an upper part of its shaft a support member (701b, 701c) which is transverse to the shaft and which, in a fastening position, settles at an edge of one of said recesses (271 to 277) of the upper surface of the working platform (252, 253), against a flank of one of said ridges of the upper surface of the working platform (252, 253).