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Installed Bearing




Bridge Bearings

Neoprene Bearing Pads and neoprene bridge bearings are moulded from a mixed compound sheets of high-grade virgin Neoprene - Polychloroprene Grade- 2 elastomer- synthetic rubber compounds. Rubber bearings are easier to install than other types of bearing and require no maintenance. Unlike most other elastomer, Neoprene Rubber undergoes no marked stiffening at low temperature when the thermal contraction of the bridge deck is at maximum. Such stiffening could be deleterious to bearing and / or structure. Correctly-designed and suitably-compounded Neoprene Rubber bridge bearings can be confidently expected to function efficiently for at least a hundred years.

As efficient bearing plates for pre-cast, pre-stressed concrete or steel beams in bridges and buildings, Neoprene Pads - plain/laminated - manufactured by us permits a smooth and uniform transfer of load from the beam to the substructure and allow beam rotation at the bearing due  to deflect ion of the beam under load. They further allow lateral and longitudinal movement of the beam caused by thermal forces. Neoprene Pads have no movable parts and thermal expansion and contraction are absorbed by the pad's ability to give and take in shear. There is no sliding motion between pad and beam or between pad and abutment. 


The material specifications for the elastomeric bearing shall meet all the current requirements of AASHTO M 251 (Standard specifications for laminated elastomeric bridge bearings) as listed under subsections "Materials" and "Test". Refer to table given in heading Neoprene & Natural for Physical Properties offered by us on bearings manufactured by us as per both AASHTO & BS criteria. Natural Rubber Compounds are used where Laminated Elastomeric bearings are designed, manufactured and tested in accordance with BS 5400 Part 9.


Elastomeric bearings shall be composed of multiple laminates of elastomeric material separated by steel reinforcing. The overall size of the bearing, the number of laminates and thickness of laminates are designed in accordance to the requirement of Load to be Transferred. Bearings having steel plates as reinforcement shall be cast/compression moulded/vulcanized as a single unit in a mould under pressure and heat. The steel plates separating the elastomeric layers will be completely bonded by vulcanization to the elastomeric material on all surfaces using special metal to rubber bonding adhesive. All external load  bearing steel plate(s) if present, shall be factory vulcanized to the elastomeric bearings during the primary molding process. 


Mechanical bearings are also manufactured and supplied by us and further investments for plant up-gradation is under way.


In house Quick Production Test of all bearings shall be done at Clients/Representative presence. Tests confirming to AASHTO specification in accordance with Acceptance Testing on either Level I or Level II or Short/Long-Duration Compression Test up to 4000 kN can be carried out in our facility.


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