This standard specifies the requirements for materials, design, fabrication, type testing, and installation of modular expansion joints for road bridges. It covers multi-element joints designed to accommodate large movements while ensuring a smooth riding surface, water tightness, and durability under traffic and environmental loads.
Specifies material, design, manufacturing, testing, and acceptance requirements for modular expansion joints used in bridges.
Quick Reference Values
Elastomer hardness63 ± 5 Shore A
Minimum tensile strength of elastomer13 MPa
Minimum elongation at break for elastomer350%
Steel grade for centre beams/edge beamsS355J2 or higher as per IS 2062
Minimum zinc coating thickness (galvanizing)85 microns for steel thickness >6mm
Fatigue load cycles for type test2 x 10^6 cycles
Design movement capacityRanges from 160 mm to over 1200 mm
Practical Notes
The success of a modular joint is highly dependent on correct installation. Ensure blockout preparation, levelling of the joint, and grouting procedures are strictly followed as per manufacturer's guidelines and this code.
Water tightness is a common failure mode. During inspection, pay close attention to the integrity of the elastomeric seals and their connection to the steel profiles.
Always demand a complete Type Test report from the manufacturer for the specific model of expansion joint being supplied, as proof of compliance with the performance requirements in Clause 8.