' Output MsgBox "Factored Moment = " & Moment_Midspan & " ft-kips"
: Computes dead loads (self-weight), earth pressure, and live loads (e.g., IRC Class AA, 70R, or standard wheel loads). box culvert design calculations xls link
which details input data like concrete strength and soil friction. ExcelCalcs : Features a Concrete Box Culvert Analysis and Design tool submitted by professional engineers. USACE (TAD) : Provides a Hydraulic Culvert Worksheet for flow and Manning's calculations. Key Design Calculation Steps ' Output MsgBox "Factored Moment = " &