Spherical bridge bearings, composed of precision-machined steel plates with spherical concave and convex surfaces, provide flexible movements and rotations between the superstructure and supporting structures to transfer whether horizontal or vertical force safely.
Spherical bridge bearing - guided type
- Allows for large displacement.
- Accommodate larger rotations than pot bearing in excess of +/- 0.03 radians.
- Unlimited movement capability in any directions.
- Excellent self-alignment capability.
- Minimum sliding friction coefficient.
- Dimpled PTFE disc is fitted in 1/2 depth of the concave steel plate for higher load bearing capacity.
- PTEF disc with cavities for containing lubricant to reduce sliding friction.
- Complying with BS EN-1337, KS4424, AASHO, ISO or other custom standards.
- Easy installation.
- Low cost maintenance.
- Ideal for structures with bearings of larges turning angles.
- Bridges with big torsions.
- Bridges in low temperatures lower than -30℃.
- Wide and curved bridges.
Similar to pot bearing, spherical bridge bearings are available in fixed type, guided type and free sliding types as shown in the following pictures:
Fixed spherical bridge bearing
Guided spherical bridge bearing
Free sliding spherical bridge bearing
- Fixed type bearing only allows for rotations, any longitudinal or transversal movement is restrained.
- Guided type has edge steel guide to accommodate unidirectional movements.
- Free sliding type bearing can slid in all directions.