1) Elastomeric Bearings - Natural Rubber
Recommendations for Laminated Elastomeric Bearings
General
1) Function
Elastomeric bearings can accommodate translational movements in any direction and rotational movements about any axis by elastic deformation . They should not be used in tension .
2) Basic of design
The basic of the design in that the elastomeric is an elastic material the deflection of which under a compressive load is influenced by its shape .
Reinforcing plates included in the bearing should be bonded to the elastomer to elastomeric bearing should be designed at the serviceability limit state only .
3) Fixing and installation of bearings
a ) When the requirements for bearing installation are being specified , the following should be considered :-
i ) Flatness of contact surfaces .
As laminated bearings are stiff , the contact surfaces should be flat and
irregularities should be kept small. A Tolerance of +- 1mm over the contact
surfaces is normally adequate .
ii ) Out of parallel between contact surfaces.
Where bearings are to be installed between performed surfaces , the out of
parallel tolerance between these surfaces should be specified to ensure that
the combination of out of parallel of the bearings themselves added to the out
of parallel of the contact surfaces will leave sufficient rotation capacity in the
bearing for working conditions .
iii ) Texture of contact surfaces
The best contact surfaces are those that have an uniform texture and a
high coefficient of friction . Smooth or slippery surfaces should be avoided .
Method of installing rubber bearings
1) Introduction
a) Rubber bridge bearings can be conveniently divided into 2 types -- " fixed " ,
where the deck is permitted only to rotate and horiontally movements of the
deck are restrained , and " Free " , where the deck can rotate and
move horizontally .
i ) Fixed Ends
Fixity is usually provided by dowels passing from the deck to the abutment.
One end of each of these dowels should be fitted with a rubber dowel cap ,
which permits the deck to expand and contract laterally and to rotate .
ii ) Free Ends
Bearings will locate satisfactorily by friction alone , provided that the requirements
in clause 10.11 , section 9.1 , BS 5400 is satisfied .
Other Construction Products :- ( Custom Made for Individual Customer if MOQ meets )
2) Speed Cushions Ramp
3) Sleeping policemen / Road Hump
* Note : Please provide product Characteristics , Specifications , Dimensionals , Special Requirements etc
Recommendations for Laminated Elastomeric Bearings
General
1) Function
Elastomeric bearings can accommodate translational movements in any direction and rotational movements about any axis by elastic deformation . They should not be used in tension .
2) Basic of design
The basic of the design in that the elastomeric is an elastic material the deflection of which under a compressive load is influenced by its shape .
Reinforcing plates included in the bearing should be bonded to the elastomer to elastomeric bearing should be designed at the serviceability limit state only .
3) Fixing and installation of bearings
a ) When the requirements for bearing installation are being specified , the following should be considered :-
i ) Flatness of contact surfaces .
As laminated bearings are stiff , the contact surfaces should be flat and
irregularities should be kept small. A Tolerance of +- 1mm over the contact
surfaces is normally adequate .
ii ) Out of parallel between contact surfaces.
Where bearings are to be installed between performed surfaces , the out of
parallel tolerance between these surfaces should be specified to ensure that
the combination of out of parallel of the bearings themselves added to the out
of parallel of the contact surfaces will leave sufficient rotation capacity in the
bearing for working conditions .
iii ) Texture of contact surfaces
The best contact surfaces are those that have an uniform texture and a
high coefficient of friction . Smooth or slippery surfaces should be avoided .
Method of installing rubber bearings
1) Introduction
a) Rubber bridge bearings can be conveniently divided into 2 types -- " fixed " ,
where the deck is permitted only to rotate and horiontally movements of the
deck are restrained , and " Free " , where the deck can rotate and
move horizontally .
i ) Fixed Ends
Fixity is usually provided by dowels passing from the deck to the abutment.
One end of each of these dowels should be fitted with a rubber dowel cap ,
which permits the deck to expand and contract laterally and to rotate .
ii ) Free Ends
Bearings will locate satisfactorily by friction alone , provided that the requirements
in clause 10.11 , section 9.1 , BS 5400 is satisfied .
Other Construction Products :- ( Custom Made for Individual Customer if MOQ meets )
2) Speed Cushions Ramp
3) Sleeping policemen / Road Hump
* Note : Please provide product Characteristics , Specifications , Dimensionals , Special Requirements etc
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