Gurugram, Feb. 12 -- Changes in India's seismic design standards notified by the Bureau of Indian Standards (BIS) in November last year have prompted Gurugram Metro Rail Limited (GMRL) to revise the structural design of the entire Gurugram metro alignment, with stronger safety measures being incorporated into piles, pillars and stations, officials said.

Metro officials said designs for piles, pillars and stations are being updated to meet specifications under the new seismic zone notification issued by BIS. Additional designers and planners have been deployed to rework structural designs, though officials said efforts are being made to ensure the revisions do not affect construction timelines.

As per GMRL officials, the cost of revision...