Which manual provides guidelines to DPWH engineers for seismic design of conventional new bridges under large earthquakes?

• A. Seismic Bridge Design Manual
• B. Earthquake Bridge Design Guidelines
• C. Bridge Seismic Design Specifications (BSDS) Design Guide Manual
• D. Structural Seismic Design Manual

Answer: (C)

The manual that provides guidelines to DPWH engineers for seismic design of conventional new bridges under large earthquakes is the Bridge Seismic Design Specifications (BSDS) Design Guide Manual. This publication pairs the official Bridge Seismic Design Specifications with a practical guide that tells engineers how to apply those requirements to typical bridge projects, covering aspects like appropriate load combinations, performance objectives, detailing, and evaluation under strong earthquakes. The other titles sound plausible but do not represent the official DPWH framework for seismic design, so they aren’t the sources used for these guidelines.