sentences:  The anchor performance (load-carrying capacity and characteristic displacements) under different loading condition is assessed experimentally, then an official document is produced by technical assessment body.In design phase, the displacement occurring under the characteristic actions should be not larger than the admissible displacement reported in the technical document.Under seismic loads and there would be the possibility that an anchor is contemporarily (i) installed in a crack and (ii) subjected to inertia loads proportional both to the mass and the acceleration of the attached element ("secondary structure") to the base material ("primary structure").