The Bangalore Metro Rail Corporation Limited (BMRCL) has launched the first ever U Girder on the ORR-Airport line. The first U Girder span was placed between two pillars near Bagmane Tech Park on Saturday night.
BMRCL officials said that use of the U Girder on this line will help in expediting the project. In phase I and phase II of the project, the BMRCL had used a box girder to build the elevated corridor. Earlier, to place ten segments of the box girder, the BMRCL needed 5 to 6 days even with the help of huge cranes. But now, the single span of the U girder can be erected overnight.
Zakir Hussain, chief engineer, BMRCL, said, “U girders will involve casting the entire span of a viaduct between two piers in a single piece, whereas box girders will have many segments between two piers. One U girder between two pillars can be erected overnight, against 6 to 7 days in case of segmental construction. The weight of a complete span of U girder is much lesser than the segmental box girder.”
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