: b = 1000 mm, h = 250 mm. d = h – cover – φ/2. Assume φ = 12 mm main bars. d = 250 – 40 – 6 = 204 mm.
Designers must apply partial factors—typically and 1.5 for variable actions (variable earth pressure or traffic)—to determine design forces. box culvert design calculations eurocode 2021
: Concentrated tandem system and uniformly distributed loads. : b = 1000 mm, h = 250 mm