12. Substructure Code Checks

This section applies the code check templates to verify substructure components per AASHTO LRFD 9th Edition.

Substructure code checks verify capacity under all load combinations, including seismic considerations where applicable.

Substructure Code Checks

Check	Description
Pier Cap Code Check	Flexure and shear in pier caps
Pier Column Code Check	Axial-moment interaction
Pier Footing Code Check	Bearing, flexure, and shear
Pile Capacity Check	Axial and lateral capacity

Checks Performed

Pier Cap

• Flexural strength at critical sections

• Shear strength with stirrup design

• Serviceability (crack control)

Pier Column

• P-M interaction at all limit states

• Slenderness effects

• Confinement requirements

Pier Footing

• Bearing pressure distribution

• One-way and two-way shear

• Flexural reinforcement

Pile

• Axial compression capacity

• Lateral load capacity

• Group effects (if applicable)