AASHTO LRFD Bridge Design Calculators
Bridge load combos, girder design, decks, bearings, and substructure checks.
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How to use this resource
These calculators focus on the key AASHTO LRFD bridge topics—load combinations, girder design, slabs, bearings, and substructure checks—so you can pick the model that matches your stage in the structural workflow.
Review the assumptions for each tool, rely on jurisdictional design values, and double-check any fatigue or stiffness inputs before relying on the interactive results.
Full original guide (expanded)
The original AASHTO LRFD Bridge Design guide listed the calculators and context below exactly as they appeared on the legacy page.
AASHTO Load Combinations
Fatigue/Strength/Service/Extreme.
Girder Design
Flexure/shear, stiffness, spacing.
Deck Slab
Bar spacing, thickness, cover.
Bearing Checks
Service rotations and pressures.
Substructure Checks
Piers/abutments, loads, stability.
Use jurisdictional editions and site-specific loads; confirm fatigue/importance.