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NAV Product Selection & Technical Assistance

Choosing the right bridge bearing or expansion joint is critical to the safety and longevity of any structure. Our technical team works closely with consultants, contractors, and project engineers to recommend the most suitable products for each project, and conducts technical seminars and workshops to help engineers understand product specifications, design considerations, and selection best practices.

Bridge Bearings

Selection is based on load capacity, rotation and translation requirements, seismic considerations, and site-specific parameters, in line with IRC:83 — Standard Specifications and Code of Practice for Road Bridges, Section IX: Bearings:
Part I — Roller & Rocker (Metallic) Bearings
Part II — Elastomeric Bearings
Part III — POT, PIN, Metallic Guide and Plane Sliding Bearings
Part IV — Spherical and Cylindrical Bearings

Bridge Expansion Joints

Joint selection is governed by IRC:SP:69-2011 — Guidelines and Specifications for Expansion Joints, which classifies joints by their movement capacity:

Movement Range Joint Type (per IRC:SP:69-2011) Max. Movement
Small openings Buried Joint up to 10 mm
Filler Joint up to 10 mm
Asphaltic Plug Joint up to 25 mm
Medium openings Compression Seal Joint up to 40 mm
Single Strip/Box Seal Joint up to 80 mm
Reinforced Elastomeric Joint up to 80 mm
Large openings Modular Strip/Box Seal Joint over 80 mm (80 mm/module)
Finger Joint over 80 mm
Reinforced Coupled Elastomeric Joint over 80 mm, up to 230 mm

No joint is required for movement below 6 mm, per Cl. 5.4 of the code.
Our engineers assess the deck's design movement (longitudinal translation, rotation, and transverse movement), structure type, and site conditions against these codes to recommend the correct bearing or joint type for each project.
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