August 18, 2022
Additional embedment depths and approved reusage
The SORMAT concrete screws from the S-CSA family have long proven their true versatility. With the ETA revision and a new national approval, the possible applications of the products have been considerably expanded.
An additional, reduced embedment depth of 35 mm is now possible for multiple fastening of non-load-bearing systems in concrete (ETA-17/1009) using the S-CSA concrete screws with a diameter of 6 mm and hexagon head (HEX), pan head (P) or countersunk head (CS). As well as the two installation depths of 35 or 40 mm for multiple fastening, a third installation depth of 55 mm can now be used for single fastening. This gives contractors even greater flexibility for application while at the same time reducing the risk of colliding with the installed reinforcement during fastening.
The new approval DIBt Z-21.8-2136 regulates the option of reusing the S-CSA+ concrete screw, 14 mm diameter with hexagon head. The ETA-approved S-CSA Plus concrete screw for high loads is approved by German Institute for Building Technology (DIBt) for reusage in combination with the CG checking gauge. The checking gauge is a tool for measuring the reusability of the S-CSA Plus concrete screw for temporary bracing applications like concrete molds. The check must be made before each reuse. If the concrete screw can go through the test sleeve, the product must no longer be used.
S-CSA concrete screws are screwed directly through the attachment into the substrate. By doing so, the thread cuts into the concrete, creating a mechanical serration across the total embedment depth. No expansion forces occur during installation, making them particularly suitable for temporary fastenings near the edge.