NCSPA Engineering Calculator
CSP LRFD Height of Cover Calculator
Evaluate minimum and maximum cover for round corrugated steel pipe using the AASHTO LRFD calculation procedure reflected in the NCSPA source workbook.
Pipe Selection
Select the CSP diameter, corrugation, and gage. Section properties are populated from the source workbook.
Section Properties
Calculated / workbook valuesVehicle Loading
Both design vehicle configurations are evaluated. The configuration producing the larger live-load pressure controls at each cover depth.
Vehicle 1
Vehicle 2
Load & Resistance Factors
Workbook defaults are preloaded and may be adjusted for the design condition being evaluated.
Calculated Results
Allowable Height of Cover
Maximum cover satisfying the workbook resistance check over its 1-ft search increments.
Minimum cover satisfying the workbook live-load check over its 0.1-ft search increments.
Calculation Details
Key intermediate values are shown for review and comparison with the source workbook.
This calculator is an engineering aid based on the supplied NCSPA CSP LRFD workbook. The designer remains responsible for confirming applicable AASHTO requirements, project criteria, material properties, installation conditions, and final design suitability.