Heavy Infrastructure Components

Elastomeric Bridge
Bearing Pads

Engineed as a specialized unified structural unit vulcanized under extreme heat and pressure. These high-grade polychloroprene blocks facilitate controlled elastic deformation to accommodate translation and rotational shifts in bridge superstructures.

View Size Matrix Installation Protocol

Standard Compliance

IRC: 83 (PART II) 1987

Fully compliant with the latest regulatory bridge amendments.

M.O.S.T. Section 2000

Meets Clause No: 2005 specifications for road & bridge works.

UIC CODE 772 R

International standard validation for use in high-impact railway bridges.

Material Engineering & Composition

Vulcanized Polymer Parameters & Laminate Rules

01 /

Raw Elastomer Formulation Metrics

To prevent structural degradation from low-temperature environmental exposure and maintain a reliable, long-term shelf life, the raw elastomer material matrix used across all structural bearings is limited strictly to specialized raw Poly-chloroprene compounds. We utilize authenticated runs matching the following precise formulations:

Neoprene WRT Grade

Bayprene 110 Variant

Skyprene B5 Matrix

Denka S-40V Formula

≥60%

Minimum overall content of pure **Poly-Chloroprene** compound in total mass.

<5%

Strictly capped maximum limit on structural **total ash content** values.

02 /

Laminate Proportionality Scaling

Internal steel laminates must align exactly with the technical specification parameters of **IS: 226**. Structural engineering scaling dictates that steel plate thickness changes require proportionate alterations in the inner elastomer matrix heights:

3 mm Steel Laminate 8 mm or 10 mm Elastomer Layer

4 mm Steel Laminate 12 mm Elastomer Layer

6 mm Steel Laminate 16 mm Elastomer Layer

Outer cover elastomer layers (Top/Bottom) match half the individual inner thickness layer, capped strictly at a **6 mm maximum** boundary limit. **Side matrix cover** layers are verified continuous at **6 mm**.

Data Catalog & Testing Benchmarks

Structural Load Ratings & Material Testing Standards

Select a configuration tab below to inspect live structural load tolerances or verify raw rubber chemistry metrics under standard Indian Standard (IS) testing methods.

Code Reference	Dimension (Overall L × W)	Thickness (Max)	Thickness (Min)	Design Load (Max)	Design Load (Min)
RSI 001	250 mm × 160 mm	32 mm	16 mm	350 kN	70 kN
RSI 002	320 mm × 160 mm	32 mm	16 mm	460 kN	90 kN
RSI 003	320 mm × 200 mm	40 mm	24 mm	580 kN	120 kN
RSI 004	400 mm × 200 mm	40 mm	24 mm	730 kN	150 kN
RSI 005	400 mm × 250 mm	48/50 mm	24/30 mm	920 kN	180 kN
RSI 006	500 mm × 250 mm	48/50 mm	24/30 mm	1160 kN	230 kN
RSI 007	500 mm × 320 mm	90 mm	48 mm	1500 kN	300 kN
RSI 008	630 mm × 220 mm	65 mm	48 mm	1900 kN	380 kN
RSI 009	630 mm × 400 mm	84 mm	48 mm	2400 kN	480 kN
RSI 010	800 mm × 400 mm	84 mm	48 mm	3100 kN	600 kN

Calculation Factor: 10 kN is equivalent to 1 M.T. Design Load Threshold: 10 MPa Equivalent Shear Modulus (G): 0.8 & 1.2 MPa Ultimate Compressive Strength: > 60 MPa

No.	Core Matrix Characteristics	Specified Values	Unit	Testing Standard
1	Shore A Hardness	55 to 65	SHORE Hardness	IS: 3400 (Part II)
2	Tensile Strength	17 Minimum	MPa	IS: 3400 (Part I)
3	Elongation at Break	400 Minimum	%	IS: 3400 (Part I)
4	Compression Set	35 Maximum	%	IS: 3400 (Part X)
5	Accelerated Ageing Requirements [IS: 3400 (Part IV)]			IS: 3400 (Part IV)
• a	Change in Hardness	15	Shore A	Sub-clause validation
• b	Change in Tensile Strength	-15	%	Sub-clause validation
• c	Change in Elongation	-30	%	Sub-clause validation
6	Adhesion Strength	7 Minimum	kN/m	IS: 3400 (Part XIV)
7	Resistance to Ozone Run	No Defect Observed	—	IS: 3400 (Part XX)

Structural Engineering Protocol

Site Installation & Substructure Alignment

The implementation method for elastomeric bearings varies significantly depending on whether the superstructure is cast in-situ, precast concrete, or structural steel beams. Regardless of design, the lower and upper concrete mating surfaces must remain completely horizontal, parallel, clean, and flat.

In-Situ Concrete Construction

During cast-in-place execution, structural formwork barriers must be engineered to flawlessly prevent active concrete from weeping down and fouling the elastomeric bearing sides.

Surround the bearing body with expanded polystyrene elements to provide a resilient perimeter safety barrier.
Apply high-strength tape across the joint line between the top face of the bearing and the polystyrene shield.
Completely strip away the protective polystyrene after the structural concrete deck has fully cast and set.

Application Area: Cast-In-Place Bridge Decks

Precast Beams & Steel Girders

When structural elements are seated down onto laminated bearing pads, individual assemblies must be physically restrained from experiencing positional movement during launching stages.

Clean and prepare the support seat area to ensure load-carrying faces rest parallel.
Apply a high-precision skim coating prior to beam launching to neutralize underlying micro-irregularities.
Lock down components securely to prevent displacement during beam erection or subsequent secondary concreting.

Application Area: Precast Beams / Structural Steel

Looking for a Custom Geometric Design?

Our engineering desk manufactures custom sizes exactly matching your project specifications. Submit your structural drawings or load parameters to receive an authenticated compliance quote.

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Elastomeric Bridge Bearing Pads