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44 R E L A S T ® D E S I G N M A N U A L Installation instructions A Rebar detection 1 Detect the reinforcement bars and mark the positions of the drill Damaged reinforcement bars can reduce the load bearing capacity In case of damage the loadbearing capacity shall be verified by the structural engineer The drill diameter must not exceed d cut B Drill hole drilling Standard hole drilling Stepped hole drilling 2a Hammer Drilling HD or Compressed Drilling CD Drill a hole into the base material to the size and embedment depth required by the selected reinforcing screw anchor → Proceed with Step C1 Standard hole drilling Stepped hole drilling 2b or Hollow Drill Bit System HDB Drill a hole into the base material to the size and embedment depth required by the selected reinforcing screw For stepped hole drilling it is recommended that the smaller diameter drill hole shall be drilled using HD or HDB This drilling system removes the dust and cleans the drill hole during drilling → Proceed with Step D Standard hole drilling Stepped hole drilling 2c or Diamond Drilling DD Drill with diamond drill a hole into the base material to the size and embedment depth required by the selected anchor In case of aborted drill hole the drill hole shall be filled with mortar → Proceed with Step C2 • Attention Standing water in the borehole must be removed before cleaning • For overhead installation it is recommended that the fastening element is inserted through a suitable oneway funnel to catch any mortar that may escape during installation • If reinforcement is hit when drilling is approaching the bottom tensile reinforcement drilling shall be stopped and the bonded screw anchor shall be installed to the bottom edge of the reinforcement layer only Installation beyond the can also be the compression chord installation from above negative bending moment Reinforcement is no longer possible in this case and a reassessment of the shear force verification could be required • Damaged reinforcement bars can reduce the loadbearing capacity In case of damage the loadbearing capacity shall be verified The drill diameter shall not exceed d cut 5 PRODUCT INFO