Mutual releasable connection of two support portions of a variable-length construction support

The present invention relates to a G-hook for mutual releasable connection of two support sections of a telescopic construction support with a bolt and a bracket. When the bolt and the bracket is different, separate parts which are rotationally rigidly connected to each other. The bolt comprises a force introduction section partially curved surface and the force introduction portion diametrically opposite power ablation section whose surface is substantially planar. Further, the invention relates to a telescopic construction support, the support section are connected by means of an inventive G-hook detachably to one another.