forces in motion

Permanent locking devices are the simplest type of seismic devices, which are in operation in a variety of different designs. Standardization for these devices is difficult, since there are individual requirements for each project with considerable variation. This is why permanent restraint systems are developed in a project-specific way according to customers’ specifications. They retain the structure horizontally in x- and y-direction (HK) or guide to one the two directions (HKE).

MAURER Shock Transmission Units allow for slow relative movements (< 0,1 mm/s) in the building at normal strain by traffic or climatic fluctuation. Only in case of shock load, MSTUs serve as a locking device that blocks horizontal displacements. The activation speed, also called lock-up speed, is between 0.1 und 1.5 mm/s as a rule but can amount to up to 5 mm/s in special cases.

Shock Transmitters with load limitation allow for relative movements in the building structure at normal strain by traffic or climatic fluctuations. Only in case of shock load, they serve as a locking device up to a defined load limitation that blocks horizontal displacements.

Based on the standard EN 15129, the use of MSTL reduces the design force by 26% compared to classical MSTUs. As opposed to MSTUs, the load-carrying capacity of the elements and the structure is increased, since with MSTLs it is made sure that arrangements which are connected serially or in parallel are equally loaded at the same time.