The slabs and walls are designed as RC sections.
for the specific loading conditions of your culvert project? Precast/CIP Culvert Design and Analysis - Eriksson Software box culvert design calculations pdf
Ensure the concrete thickness is sufficient to resist shear without stirrups, as stirrups are difficult to install in thin culvert walls. The slabs and walls are designed as RC sections
( w_u = 1.25\times27.85 + 1.75\times18.6 ) = 34.81 + 32.55 = 67.36 kN/m² Negative moment (end) = ( 67.36 \times 3.0^2 / 12 ) = 50.52 kN·m/m Positive moment (mid) = ( 67.36 \times 3.0^2 / 20 ) = 30.31 kN·m/m Shear at face of wall = ( w_u \times L / 2 ) = 67.36 × 1.5 = 101.04 kN/m box culvert design calculations pdf