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Depending on a building’s geometry, location and vertical loading, horizontal loading of approximately 10% of vertical loading can typically be assumed as a first estimate.
These horizontal loads must be resisted by a rigid zone or core of the building, such as a lift shaft. Only deformation bearings, and not sliding bearings, should be used in the rigid zone.
For slabs with a thickness of up to 25cm in apartment or commercial structures, shrinkage of up to 0.6 ‰ can occur.
The amount of shrinkage depends on slab thickness and the prevailing humidity; the drier and thinner a slab is, the more shrinkage can be expected.
∆l= 0.6‰ x l
Change in length [m]
Distance from the movement “zero point” [m]
∆l= αt x ∆t x l
Coefficient of expansion due to temperature 10-5/oC
Change in temperature [oC]
Expansion due to temperature is generally only significant for external parts of a structure or unheated rooms.
For thermally uninsulated buildings such as multi-storey car parks or storage halls, only high-durability LASTO®STRIP TS sliding bearings should be used.
Assuming a deflection of l/200, the rotation angle will in normal circumstances (residential or office building with normal use) typically not exceed 20‰.