This is a comprehensive technical write-up on the design calculations for a Reinforced Concrete (RC) Box Culvert. This document is structured to serve as a technical guide or a theoretical basis for a design report. 1.0 Introduction A box culvert is a rigid frame structure, typically rectangular in cross-section, used to convey water (streams, storm drains) or act as pedestrian/vehicular underpasses. Unlike flexible pipe structures, a box culvert relies on the rigidity of its structural elements (top slab, bottom slab, and side walls) to resist loads. And Mittal Pdf — Nootan Isc Physics Class 12 By Kumar