When installing the anchor, care must be taken during the drilling process not to damage the reinforcement bars in the base material.
To help you discover the position of the reinforcement bars before you start drilling, check the detailed project plans to see the configuration and layout of the reinforcement within the concrete and use metal detectors to precisely identify the position and layout of this reinforcement.
In prestressed concrete and precast hollow core slabs, the distance between the hole and the reinforcement must be at least 50 mm.
If, despite taking all the above measures, you find a reinforcement bar during the drilling process, abort the hole and drill another hole so that you don’t damage the reinforcement.
It may be advisable to install the anchors immediately next to the aborted hole, provided that the anchor depth is greater than the depth of the aborted hole, or to drill a new hole at a distance of at least twice the depth of the aborted hole. Alternatively, a smaller distance can be chosen, provided that the aborted drill hole is filled with high-strength mortar (minimum 40 N/mm2). However, unless the aborted drill hole is filled with mortar, it must not be closer to the aborted hole than 1.0 hef (effective anchor depth) or 5 d0 (nominal anchor diameter) in the direction of load application under oblique or shear tensile loading.
Latest revision: FAQ15 rev0
