- Bond length: the anchor is set in the borehole using cement grout (mortar), and is able to transfer the forces to the load-bearing soil via bond and skin friction
- Unbonded (or free) length: the tendon is uncoupled from the borehole wall using a sheathing (sleeve) which is sealed towards the coupling or hollow bar; the unbonded portion can freely extend and tension can be applied to the anchor system
- Anchor head: transfers the anchor force to the substructure (e.g. precast concrete elements) that needs to be anchored Strand or solid bar ground anchor systems are installed into cased, pre-drilled holes and subsequently grouted. DYWI® Drill ground anchors are installed self-drilling with a pre-mounted sleeve attached to the drill string during installation.