A scaffolding coupler intended for fixed attachment to the ends of a ledger of a scaffolding system, wherein the scaffolding system comprises a plurality of standards and a plurality of ledgers, wherein each standard comprises:
- an elongate pipe wall with a central longitudinal axis;
- and
- a plurality of supporting projections, wherein each supporting projection extends substantially in a tangential direction of the pipe wall and is formed through plastic deformation of the pipe wall, wherein each supporting projection, viewed in a tangential direction of the pipe wall, when each standard of the plurality of standards is vertically oriented, comprises a number of alternately arranged raised parts and lowered parts;
- wherein the scaffolding coupler comprises:
- a foot which has a first side which is configured for the fixed attachment with a ledger pipe end of a first ledger of the plurality of ledgers, a second side of the foot, which lies opposite the first side, forming a pipe support surface for abutment against the pipe wall of a first standard of the plurality of standards or the pipe wall of a second ledger of the plurality of ledgers;
- a hook which is integrally connected with the foot, the hook having a radial inside contour which extends along a substantially circular arc;
- at least one supporting surface which is formed by the foot and the hook and which in a connected condition of the scaffolding coupler with the first standard rests on a first supporting projection of the first standard, the supporting surface being provided with at least one recess which is configured for receiving a first raised part of the first supporting projection for tangential orientation of the scaffolding coupler relative to the first standard;
- an arcuate pin having a first free end and an opposite connected end wherein the connected end is slideably connected with the hook;
- wherein the pin has an inside contour located on a radial inside of the arcuate pin and extending along a circular arc, and which, in use, abuts directly against the pipe wall of the first standard or the pipe wall of the second ledger, wherein the arcuate pin has an outside contour located on a radial outside of the arcuate pin and extending along a circular arc, and which abuts against the radial inside contour of the hook, wherein the inside contour of the arcuate pin together with the pipe support surface define a pipe receiving space having a central longitudinal axis which in a coupled condition with the first standard or the second ledger substantially coincides with a central longitudinal axis of the first standard or the second ledger, wherein a radial thickness of the arcuate pin viewed from the first free end towards a second free end of the arcuate pin gradually increases, wherein the arcuate pin is slideable relative to the hook in a tangential direction with the connected end sliding along the inside contour of the hook.