Installation arrangements for concrete anchors
How pre-positioned, through-fixing and stand-off installations determine the drilling sequence, fixture clearance hole, anchor length and shear transfer.
Installation
Drilling, setting and installation conditions.
4 guides
Drilling methods for post-installed anchors
How hammer drilling, hollow-bit drilling with dust extraction and diamond core drilling differ in cutting action, hole diameter, wall texture and cleaning, and which method the ETA permits.
Why drill-hole cleaning matters for bonded anchors
How drilling dust, moisture and slurry reduce the bond of resin anchors, and which cleaning steps and hole conditions the ETA specifies.
Anchor installation torque explained
What the installation torque does in expansion, bonded, screw and undercut anchors, how it relates to preload and clamping force, why preload falls after installation, and how clamping affects load transfer.