Which standard code is used for the design and construction of highway, railway and pedestrian bridges made of steel, concrete and composite materials?

• A. Eurocodes
• B. BS 5400
• C. AASHTO LRFD
• D. DIN EN 1993

Answer: (B)

The main idea here is that a single standard code exists to govern the design and construction of bridges across different materials and types of traffic. BS 5400 is the British Standard series that specifically addresses bridges built for road, rail, and pedestrian use, whether they are steel, concrete, or composite in construction. It provides the design rules, load considerations, material requirements, and construction and erection guidance needed to create safe, serviceable bridges within one coherent framework. While Eurocodes (the European set of standards) and other national systems exist and are widely used in various regions, BS 5400 has historically served as the dedicated reference for these bridge types and materials in many contexts, making it the best answer for this question.