Spreadsheets use iterative searching for the critical failure plane (typically bilinear, per AASHTO).
Marcus blinked. “But I followed the manual step-by-step.” mse wall design spreadsheet
Several standard reports and user manuals describe the specific capabilities and logic of these design spreadsheets: PennDOT MSE Wall Design Spreadsheet User's Manual : A comprehensive guide to a spreadsheet based on the AASHTO LRFD Bridge Design Specifications yellow for warning (SF >
Young engineers can see exactly how earth pressure coefficients are derived and how pullout resistance changes with depth. 1.3 but <
He added conditional formatting: green for pass, yellow for warning (SF > 1.3 but < 1.5), red for fail. He used data validation to limit soil friction angles between 25° and 45°, and geogrid strengths to commercially available values.