How it works
The ONGUARD anchors are welded to the tank around its base and connected to the tank’s foundation. During an earthquake they prevent the tank from overturning by holding it down whilst dissipating seismic energy through yielding of the anchors.
Unlike traditional tank anchorages that only work in a one-pull, tension manner, ONGUARD anchors provide controlled yielding in both tension and compression throughout cycling earthquake accelerations. This gives excellent energy dissipation, produces a more stable tank response and provides additional resilience to withstand earthquakes that are larger than the design case. Each ONGUARD application is carefully and specifically designed by ONGUARD engineers specifically for the seismic hazard at your location and so that all other elements of the tank system have sufficient strength to remain undamaged.
The energy dissipating element within each ONGUARD anchor acts as a seismic fuse. Once the fuse has done its job it can be inspected and if needed quickly, easily and cheaply replaced using everyday tools and with no specialist skills or experience. Full earthquake readiness is reinstated with minimal fuss.