Box culverts are subjected to a unique combination of permanent and variable actions.
Actions on structures, specifically Part 2 for traffic loads on bridges. box culvert design calculations eurocode 2021
The design of reinforced concrete box culverts under current Eurocode standards involves a integrated approach using (Basis of structural design), Eurocode 1 (Actions), and Eurocode 2 (Concrete design) . While the fundamental Eurocode 2 (BS EN 1992-1-1) provides the general rules for concrete structures, specific guidance for culverts—often treated similarly to bridges—is found in BS EN 1992-2 . 1. Design Basis and Standards Box culverts are subjected to a unique combination
For culverts carrying water regularly or in high groundwater: Eurocode 1 (Actions)
From analysis (typical for 3×2 box with 0.25m thickness):