Technology and traffic patterns evolve rapidly. The traffic volume on Indian highways in 2024 is vastly different from what it was in the year 2000. Vehicles are heavier, traffic density is higher, and the axle configurations of commercial trucks have changed.
The code applies to bridges with clear spans up to . Beyond that, the code suggests alternative structural forms (like RCC), though historical arches with larger spans may be analyzed using special provisions within the annexures. irc-78 2019 pdf
IRC:78-2014 (Revised 2019) is the Indian Roads Congress's mandatory standard for designing, constructing, and maintaining bridge foundations and substructures in India. This update integrates modern geotechnical advancements and seismic provisions, ensuring enhanced structural resilience and durability for bridge projects. The official document can be purchased through the Indian Roads Congress (IRC). Technology and traffic patterns evolve rapidly
Many users end up downloading the wrong document. Here is what to avoid: The code applies to bridges with clear spans up to
Before delving into the specifics of the 2019 revision, it is essential to understand what IRC-78 actually governs. Titled "Standard Specifications and Code of Practice for Road Bridges, Section: Loads and Stresses," IRC-78 is the "Section II" of the seven-part bridge code series.
While older versions focused on Working Stress Design (WSD), newer segments like IRC:78 (Part 2) specifically address Limit State Design (LSD) for foundations, providing more robust safety margins.
Essential reference, but source a clean, official copy.