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Uplift spherical bearings
Filigree and lightweight construction methods in conjunction with complex load situations for traffic, wind, earthquakes etc. often not only exert pressure loads on bearings, they can also frequently lead to uplift forces. When these tensile forces apply, the bearing must still be able to rotate and be displaced in the same way as under pressure.
Uplift spherical bearings for structural safety
- Transfer of alternating compression/tensile loads only in rare load-bearing safety situations (such as earthquakes) in which only a limited number of no more than 50 load clearance instances occur.
- Accommodation of displacement and rotation in three plane directions
Special launching bearings
To insert bridge components or complete bridge sections into their end position on the pillars and abutments, they are placed on so-called special launching bearings and shifted into place over them.
- Improved design of the structure due to the greatly reduced frictional forces (1-3% friction coefficient) by the use of MSM® as the sliding material
- Bearings can optionally be connected with the launching presses
Temporary restraint devices
Complex superstructures, faster construction progress and cost savings could mean that the deck structure may temporarily need to be horizontally fixed to bearings which are actually designed for horizontal movement. The devices are equipped with a bolted restraint system. This system temporarily fixes the bearing in the desired direction.
- Restraint system for the construction stage in movable bearings
- The bolted restraints can then be removed to release the bearings for the load situations which arise in operation
Roller bearings
Roller bearings for vertical loads of up to 10 MN are only used today in exceptional cases (e.g. for maintenances) because this type of bearing only permits rotations around a single axis. MAURER roller bearings are either made of structural steel according to EN 1337-4 or in a more compact design according to DIBt approval with the German conformity mark (Ü-Zeichen) as welded roller bearings with a higher load-bearing capacity. Roller bearings can be replaced by spherical segment bearings.