Non-visible anchor mounting at the rear side of a facade tile has a bolt with a self-tapping thread screwed into a blind drilling with a shear head on exceeding a given screwing torque

摘要

The mounting system for an anchor (3), at the rear side (2) of a facade tile (1), has a screw bolt (4) with self-tapping threads (6). It is screwed into a prepared blind drilling (11) in the facade tile (1). The bolt head (9) has a coupling (10) to be engaged by a wrench which, on exceeding a given torque, shears at a nominal break point (8) from a bolt head section (7) at the threaded bolt shaft (5).