Box Culvert Design Calculations Eurocode 2021 -

: b = 1000 mm, h = 250 mm. d = h – cover – φ/2. Assume φ = 12 mm main bars. d = 250 – 40 – 6 = 204 mm.

Box culvert 3.0m × 2.5m, fill 0.7m, C30/37, B500C, cover 50mm, wall/slab 300mm, groundwater at base.

Moment distribution example (simplified): treat top slab spanning between walls as continuous slab with edge supports at wall tops; wall acts as cantilever into footing/bottom slab — use rigid frame or moment distribution tables to obtain internal moments. For conservative hand calc, assume fixed supports at joints and apply bending from uniform loads q: M_max ≈ qL^2/12 (for continuous two-span-like condition) — refine with analysis.

Design of Reinforced Concrete Box Culverts to Eurocode (2021 Updates)

For culverts with fill height (H_cover) = 1.5 m, load reduction applies.

Traffic or construction loads acting on the soil surface next to the culvert. 3. Structural Analysis Methodology