AI-assisted AASHTO design workflow
AI-Assisted AASHTO LRFD Bridge Design Software
PaiaRetain is AI-assisted AASHTO LRFD bridge design software for reinforced concrete beams, retaining walls, prestressed concrete girders, and bridge bearing systems. Analyze and design structural elements with integrated engineering calculations, AI guidance, professional PDF reports, and CAD-ready DXF output.
PaiaRetain is a web-based structural engineering calculation platform that helps engineers organize AASHTO LRFD design inputs, review calculation results, and produce detailed reports for bridge and structural design workflows.
AASHTOLRFD Based
AutoCADDXF Drawing Output
PDFReport Output
Calculation saved
Design workflow
Input → AI Guidance → Check → Report
Design modules
Bridge design workflows in one place.
Beam Shear Design
Open moduleBearing Pad Design
Open moduleReinforced Bearing Pad
Open moduleRetaining Wall Design
Open module Learn About Retaining Wall DesignPrestress Girder Design
Open module Learn About Prestressed Girder DesignWhat you get
Everything you need for bridge design—with AI assistance.
AI-assisted design
Generate preliminary dimensions, reinforcement, and design iterations from your project criteria.
AASHTO-based checks
Review governing demands, capacities, utilization, and pass or review conditions in one result view.
Engineering reports
Turn completed calculations into organized reports ready to review and print.
CAD-ready output
Generate dimensioned DXF files from supported design results and continue detailing in AutoCAD.
Project history
Keep inputs, calculations, design iterations, and outputs organized in one project record.
A repeatable workflow
Move from project setup to a usable design record.
01Set up your project
02Enter design inputs
03Generate a preliminary design with AI
04Review AASHTO checks
05Export report and CAD