Choosing box culverts for crossings and underpasses
Loading class, joint detail, and dimensional control should match the corridor — not a one-size catalogue page.
Start with load and opening
Highway and railway loadings (Class 70R, A, AA, and railway categories) drive section size and reinforcement. Share drawings early so units match the signed load case.
Close manufacturing tolerances — about ±5 mm on length and edges — keep water-tight jointing and site fit predictable.
Plan for install, not just delivery
Prepared bases, segment sequencing, and flange-bolt connections matter as much as the unit itself. Drawing review and delivery planning connect plant output to the corridor schedule.