Abstract: An arrangement and method for determining loading capacity of coating elements for structures has a pressure generating element, a force bar to be placed on the coating element to be tested, a two-armed lever with an axle supported on the force bar, one arm articulately connected with the pressure generating element, and the other arm on which a moment opposite to the moment on the one arm acts, and a free end of the other arm actuates a switching device for the pressure generating element.

Abstract: A coupling for clamping metallic scaffold tubes has two levers pivotally mounted on a common hinge and arranged to be locked by a wedge when they surround the scaffold tube. One of the levers is provided with a second hinge pivotally supporting a yoke which in turn supports the wedge. The thickened formations are provided on two opposite faces of the bars constituting the yoke, the formations preventing the wedge which is formed of sheet metal from slipping out of the yoke.

Abstract: A horizontal or diagonal bracing element in a scaffolding structure includes a terminal lug which is pivotably connected to another lug on a connection shoe; the shoe is provided with an elongated slot for receiving a fastening wedge insertable into a radial aperture in a connection flange on a vertical supporting element of the scaffolding; the other lug forms with the midline of the elongated slot an angle of 135.degree..

Abstract: A scaffold plank has a horizontal metal walkway provided with a plurality of perforations with selectively upwardly and downwardly extending collars, two side flange members each extending along one side edge of the walkway and formed by a side portion of the latter, and two end profiled members each extending beneath the walkway along one end edge of the latter and connected with the walkway and the side flange members. Each end profiled member is provided with an element for suspending the plank.

Abstract: A first member is provided with an elongated recess which has one open end, and a first throughgoing passage which extends transversely to the elongation of the recess. A second member which is to be connected to the first member is provided with a disc which extends outwardly away from the second member. The disc is adapted to be received in the recess when the second and first members are connected to one another. The disc is provided with a throughgoing passage so arranged as to communicate and bound with the first passage of the first member a throughgoing channel. A wedge-shaped element is closely receivable in the channel so as to arrest the second member on the first member and prevent any movement of these two members relative to one another.

Abstract: The frame structure of the invention has a plurality of tubular uprights of circular cross-section each including a number of axially spaced ring flanges which are concentric with the respective upright and which are each formed with circumferentially distributed cut-outs of differing shapes. A plurality of bracing elements connect the respective uprights and each of them has two end portions. Each end portion is formed with an axial slot having a width at least equal to the thickness of the respective ring flanges and subdividing the respective end portion into two sections provided with registering openings extending normal to the elongation of the respective bracing element. A releasable wedge member extends through these openings across the slot and through one of the cut-outs of a ring flange which is in part located in the slot.