Elastomeric Bridge Bearing

Elastomeric Bridge Bearing Pads

Elastomeric Bridge Bearing Pads Manufacturers and Suppliers

Deesawala Rubber Industries has a well-equipped Material Testing Laboratory for testing the quality of raw materials and finalized products. We ensure the quality standards meet the Industry’s specifications/IRC CODES. And, for manufacturing products, we employ top-notch plant and machinery. Our personnel, who are well-experienced engineers and technicians, work with dedication to meet the specific requirements of our clients.

Deesa Elastomeric Bridge Bearings are designed and manufactured as per IRC 83 Part II-2015, with its latest amendment to meet the requirements of MORT&H specification for road and bridge works to Section no: 2000 to clause no 2005 (Elastomeric Bearings) and to international specification Union of Railways Code No. UIC 772 – 2R (use of Rubber Bearings for Railway Bridges).

Deesa Elastomeric Bridge bearing consists one or more internal layers of elastomer bonded to internal steel laminates shall be cast in single unit mould and vulcanized under heat and pressure to cater for translation or rotation of the superstructure by elastic deformation.

The raw elastomer used in bearings in polychloroprene of make : Neoprene W & WRT, Bayprene 110 and 210, Skyprene B5 and B30,Denka S 40 and M 40 of low crystallization rate and adequate shelf life.

The content of the poly chloroprene of the bearings shall not be lower than 60% and the ash content shall be less than 5%. The steel laminates used in bearings shall meet the specification of IS:2062/IS:1079.

Elastomeric Bridge Bearing: Deesawala Rubber Industries is one of the leading manufacturers and suppliers of Neoprene Elastomeric Bridge Bearing Pads. As an ISO 9001-2015 certified company, we take pride in being recognized as a prominent manufacturer in the market for Strip Seal Joints, Pot PTFE bearings, Compression Seal Joints, Modular Joints, and Building Joints.

Elastomeric Bearing Pads Manufacturers & Suppliers

As a leading manufacturer and supplier of Elastomeric Bridge Bearing Pads, we always strive to deliver the best products across the industry. Our Neoprene Elastomeric Bearing Pads are designed for easy bridge installation and require zero maintenance compared to other bearings available. We adhere to international norms and standards in the manufacturing process. Plus, the premium quality of materials we use to manufacture our pads makes us a trusted manufacturer of Elastomeric Bridge Bearing Pads in the market. Additionally, our products are available at the best price in the market

Elastomeric Bridge Bearing Pads Product Features

• Cost Effective
• Energy Efficient
• Effective Performance
• Durable
• Superb Quality

Elastomeric Bearing Pads Specification

• 10 KN is equivalent to 1MT
• Shear Modulus of the bearing shall be 9+/-0.18 MPa
• Design load of the bearing is equivalent to 10 Mpa
• Shear Bond test (horizontal movement up to 2x total elastomer thickness)
• Dimension can also be designed as per requirement.

Physical Properties

Physical Properties	Unit	Value Specified			Test Method
Hardness	IRHD	50 ± 5	60 ± 5	70 ± 5	IS: 3400 (Part II)
Minimum Tensile Strength - Molded Test Piece - Test Piece from Bearing	MPa	17 14	17 14	17 14	IS: 3400 (Part I)
Minimum Elongation at Break - Molded Test Piece - Test Piece from Bearing	%	450 400	400 350	300 250	IS: 3400 (Part I)
Maximum Compression Set (24h, 100°C)	%	35			IS: 3400 (Part X)
Accelerated Ageing 72h, 100 ± 1°C
Maximum Change in Hardness	IRHD	+5
Maximum Change in Tensile Strength	%	- 15			IS: 3400 (Part IV)
Maximum Change in Elongation	%	- 30
Adhesion Strength, Min.	kN/m	7			IS: 3400 (Part XIV)
Ash Content, Max.	%	5			IS: 3400 (Part XXII)
Ozone Resistance		No Cracking			IS: 3400 (Part XX)

Design of the Elastomeric Bearing:-

• The overall length divided by overall width shall be less than or equivalent to
• If thickness of steel laminates is 3 mm, then thickness of elastomer layer shall be either 8 or 10
• If thickness of steel laminate is 4 mm, then thickness of elastomer layer shall be 12
• Minimum thickness of top and bottom cover layer shall be 5 cm &minimum thickness of side cover shall be 4 mm.

Properties Of Elastomer Used In Elastomeric Bearing Pads

“Temperature Effect” - Within the range of -20°C to +80°C no significant vari­ation in performance will occur.

“Ozone” - Ozone cracking in any elastomer will occur where there are surface tensile forces. If cracking does occur, it is frequently harmless. It is simply re­lieving the surface tensions and further, deeper, cracking is unlikely.

“Longevity” - Due partly to their small surface area to volume ratio, and in particular the small surface area exposed to the atmosphere during service, plus the location where such strips / pads are used, bearing strips / pads of high quality natural rubber will give an extremely long life - typically longer than the structure.

“Fire Resistance” - Blocks of natural rubber do not burn easily. However, if fire resistance is considered essential, then in order to eliminate softening prob­lems, sheathing with a suitable fire retardant, or insulating material, foam etc, is suggested. Alternatively, design to minimise any settlement if destruction by fire would cause structural problems.

Elastomeric Bearing Pads Sizes

Elastomeric bearing pad comes in various sizes, with a standard dimension ranging from 200 x 300, 300 x350mm to 550x550mm, and thicknesses from 10mm to 150mm. These are often used in bridge and building construction.

Below is the detailed breakdown of elastomeric bearing pad sizes and related information:

Standard Dimensions:

• Length: Up to 1500mm
• Width: Up to 1000mm
• Thickness: 22mm to 144mm
• Other examples:
  • 500x320x80mm
  • 500x500mm x 96mm
  • 630x320mm x 90mm
  • 300mm x 450mm x 50mm thick
  • 250mm x 400mm x 45mm thick
  • 500mm x350mm x66mm

All other sizes are made as per customer specifications

Shapes:

Rectangular, Square, and Round.

Business type of Elastomeric Bridge Bearing Pads Suppliers Manufacturer / Supplier.

Areas covered by Elastomeric Bridge Bearing Pads Suppliers Across India.

• What is elastomeric bearing pad?
  Elastomeric bearing pads compress on vertical load and accommodate horizontal rotation and provide lateral shear movement. Elastomeric bearing pads are the most economical solution used in construction of large span bridges and buildings.
• How do elastomeric bearings work?
  Laminated elastomeric bearings support simultaneous loads and deformation in any direction. Steel plates are bonded to the rubber through a vulcanization process and have the main scope to increase the resistance of the bearings to vertical loads.
• How do you install elastomeric bearings?
  Installation of bearing. Place bearing on top of applied epoxy resin. Care should be taken, to see that, the bearing is placed according to movements specified in main drawings.
• Why are steel plates inserted inside bearings in elastomeric bearings?
  For elastomeric bearing to function as a soft spring, the bearing should be allowed for bulging laterally and the compression stiffness can be increased by limiting the amount of lateral bulging. To increase the compression stiffness of elastomeric bearings, metal plates are inserted.
• What is the function of bearing in bridges?
  A bridge bearing carries the loads or movement in both vertical and horizontal directions from the bridge superstructure and transfers those loads to the bridge piers and abutments. The loads can be live load and dead load in vertical directions, or wind load, earthquake load, etc., in horizontal directions.

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