ESZ Type C-20-E
Unreinforced elastomeric bearing
ESZ Type C-20-E is a compact elastomeric bearing without a surface profiling for use as static bearing of structural elements, like steelworks, wood constructions or especially in precast concrete construction.
- The enivronmental influences must be checked with regard to possible damage to the bearings.
- Elastomer bearings and bearing surfaces must be free of contamination. Loose particles are not permissible.
- The bearing surfaces must be free of ice and snow, grease, solvents, oils or separating agents. This must be ensured by suitable measures.
- The bearing surfaces must be carefully deburred to protect the bearing.
- The joint between the building protection mat and the vertical formwork is to be sealed by means of suitable adhesive tape; alternatively the building protection mat can be pulled up and fastened to the vertical formwork.
- Individual surface imperfections must not exceed 100 mm² and must not deviate in depth from the surrounding surface by more than 2.5 mm. The total area of the surface imperfection must not exceed 10%.
- The bearing areas must be designed in accordance with the design-specific technical specifications and standards. In general, edge distances should be provided. The elastomeric bearing should be located within the reinforcement.
- If the bearings are used with steel contact surfaces, the steel surfaces should be at least 25 mm larger circumferentially than the bearing.
- If the elastomeric bearings are tamped underneath, special care must be taken to ensure good mortar quality. The elastomeric bearing must not be overloaded at specific points. The load of the structure to be supported by the bearings should not directly load the bearing exclusively via wedges, unless a sufficiently stiff steel plate is interposed for load distribution. The wedges must be removed again after the underpacking material has hardened.
- The lateral surfaces of the bearings must not be impeded in their planned deformation.
- Each component must be separated horizontally and vertically from the adjacent components by joints in such a way that the intended support (statics) can become effective. It should be noted that joint fillings, e.g. joint compounds, profiles made of foam or panels made of mineral wool or foam, can impair the deformability can be impaired. In the case of in-situ concrete execution, the proper production of the bearing joint must be ensured.
- In the case of horizontally displaceable components, it must be checked whether fixed points or fixed zones must be arranged to determine the zero point of movement of the component to be supported to be stored. It should be noted that unintentional fixed points can have a detrimental effect on the storage of the component. The arrangement of several bearings on top of each other is not permitted.
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