By extending its range of concrete screws, fischer is acknowledging the increasing importance of this fixing method. Alongside the concrete screw FBS 6 for use in redundant systems, individual fixings can be carried out with the concrete screws FBS 8, FBS 10, FBS 12 and FBS 14. The benefits: the screws can be set and removed without torque check. Connections with concrete screws are also distinguished by a high load-bearing capacity and are instantly load-bearing.
Anchors are often applied "by feeling" and without a torque wrench. A defined prestressing force should be applied to achieve the optimum working and the maximum force transition for torque-controlled anchors. Here fischer experts explain how this works, how it changes based on the relaxation and the post-expansion behaviour and how the anchor still manages to convey the approved load.
By removing damaged layers and retrospectively reinforcing the supporting structure by increasing the static effective depth with additional site-mixed concrete, new requirements can generally be fulfilled.