From the archive record
Wat Nakorn-In Bridge in Bangkok is one of the major crossings of the Chao Phraya River in Bangkok. The bridge has a total length of 975 m each of two separate, parallel bridges. Each bridge consists of 509 m precast viaducts, and in situ cast main bridge with spans 30 + 40 + 40 + 95 + 130 + 95 + 36 m. The main bridge is of a free cantilever type. The foundations are bored piles ø1.2 m to ø1.8 m. Each main pier, which supports both bridges, has a total of 14 piles. The superstructure is a concrete box girder with height varying from 2.0 m to 6.75 m. The concrete grade used is 50 A for bottom slab and the skew webs, and 40 A for the top slab. Total width per bridge is 13.35 m. The precast viaducts are concrete box girder sections with external tendons. The bridges are designed in accordance