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The process of installation of elastomeric bearing differs in case of precast vis-a-vis cast-in-situ girders. For precast girders, the bearing may be fixed to the underside of the girder by application of epoxy resin adhesives after specified surface preparation. Care should be taken to guard against faulty application and consequent behaviour of the adhesive layer as a lubricant.
The adhesive is considered merely as an installation device and is not an adequate anti- creep measure.
The process of installation of elastomeric bearing in a cast-in-situ girder is more complex. It involves the following stages:
1. Placing and adjusting the bearings on the bed block with required accuracy.
2. Preparation of a formwork sideframe all around the bearing.
3. Filling up the space between the bearing and the formwork frame by clean sand.
4. Placement of top forms over the side frame and sand with an opening matching the size and position of the bearing.
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