How should through bolts be installed correctly?
Through bolts belong to the torque-controlled anchors. They are activated by applying a predetermined torque. Too little torque can result in the anchor slipping and the fastened component sagging. Excessive torque can cause the substrate to split or the anchor to fracture. It is therefore particularly important to activate the anchors with the predetermined torque using a torque wrench.
How do through bolts perform under load, and what design considerations apply?
Through bolts achieve their load-bearing capacity even in cracked concrete or in the case of seismic requirements through their aggressive expansion and the ability to expand afterwards. For this reason, certain points must be taken into account when using through bolts. The expansion pressure on the concrete is so high that edge distances and anchoring depths must be maintained. Otherwise, the anchor will blow up the concrete or only provide greatly reduced load-bearing capacities. Pre-dimensioning programs such as EJOT ANCHOR FIX are therefore recommended for the design of anchors. It contains all specifications regarding the installation conditions of the anchor and evaluates the load on the anchor in real time.
