If a bridge has a span of 180 meters, which design code would apply according to the source material?

• A. The Japanese basic highway bridge design code
• B. Eurocodes
• C. BS 5400
• D. Design drawing

Answer: (A)

Long-span bridges often have specialized design provisions, and the source material designates the Japanese basic highway bridge design code for a bridge with a span of 180 meters. This indicates that, within that material, long-span scenarios are governed by the Japanese code rather than European or British standards. Eurocodes would typically apply in European contexts, but the source is pointing to the Japanese code for this span length. BS 5400 is an older standard not indicated for this case, and a design drawing is not a design code. So, for a 180 m span per the material, the governing reference is the Japanese basic highway bridge design code.