Abstract: An anchoring device for fastening guide wires on a roof has a base. The base has a mounting surface, a support, and carriers to which the wire guides are attached. The carriers are rotatably connected to the support and can be fixed in any desired relative position to the support, so that the anchoring device has many possibilities for holding the guide wires. The support has a number of parts which are present between the carriers, whereby between two adjacent parts of one or more carriers can be clamped. The wire guides are at different distances d1 and d2 from the central axis of the support and are at distances D1, D2 and D3 from each other.

Abstract: A scaffold has an upright and a transverse tube connected to it, as well as a handrail tube connected to the transverse tube. The cross-section of the transverse tube is circular with an outer diameter and a flattened portion, which is present at a distance from the outer side of an opposite wall portion. The handrail tube is provided with a C-shaped recess with an inner diameter and a boundary wall which extends over an angle greater than 180 degrees, and of which the ends are at a distance from each other.

Abstract: A scaffold module has a floor and two upright side sections, which are hinged to lengthwise edges of the floor. Each hinge is formed by two extrusion pieces that can be pushed into each other, and is made so that the side sections can only be folded towards the floor in a direction towards each other. Each side section is made of one extrusion piece, in which a section of the extrusion piece forms a section of the hinges. The edges of the floor are formed by girders, between which there is a plastic plate. The girders are each formed of one extrusion piece, which forms the other section of the hinges.