The Indian Roads Congress (IRC) publishes the codes, specifications and guidelines that govern how highways and bridges are planned, designed and maintained in India. For consulting engineers they are not optional reading – they are the reference against which every design is checked.
What the codes cover
- Pavement design – IRC:37 for flexible and IRC:58 for rigid pavements.
- Bridges – IRC:6 for loads and IRC:112 for concrete bridge design.
- Geometric design and safety – IRC:73, IRC:SP:84 and the road safety audit manuals.
Why revisions matter
Traffic loads, materials and construction methods change. Each revision of IRC:37, for instance, has updated design traffic, material characterisation and reliability levels. A design checked against a superseded edition can be rejected at review, or worse, under-perform in service.
A code is the minimum the profession has agreed on – good design starts there, it does not stop there.
Staying current
- Track amendments as they are notified, not only when a new edition is printed.
- Record the code edition used in every design basis report.
- Invest in structured training so teams interpret clauses consistently.
The CEAI Academy IRC Code Training Series walks through key codes clause-by-clause with worked design examples.
