Run a known problem from the FHWA’s "Hydraulic Design of Highway Culverts" (HDS-5). Use Example Problem #2 (Concrete Box Culvert, inlet control). Your spreadsheet should match the HW depth within 1%. If it doesn’t, delete it.
If you already have a spreadsheet but want to make it "better," here is a checklist of VBA improvements and formula optimizations: box culvert design spreadsheet download better
: "Pink-cell" input systems where changing dimensions (span/rise) immediately updates all bending moments and reinforcement requirements. Detailing Support : Integration with CAD templates or automated Bar Bending Schedules (BBS) for immediate drafting. Top Spreadsheet Sources & Downloads Run a known problem from the FHWA’s "Hydraulic