Modeling, Not Drafting, a Post-Tensioned Structure Joy Beers, SE LEED AP Structural Engineer at Leo A Daly Tomas Amor Structural Engineer at HGA Image courtesy of Hobart, Yañez, Ramos, Maguey, and Martínez

Joy Beers Licensed SE in California LEED Accredited Professional Structural Engineer at Leo A Daly Penn State University, Bachelor and Master (1999) Using Revit for projects since 2004 Project experience with Arch and MEP models 3 day turn around on proposals Building Families for Structure and Architecture Modeling instead of drafting most elements

Tomas Amor Structural Engineer at HGA (4 years) Structural Technician at HGA (6 years) University of Minnesota, Bachelors Chippewa Valley Technical College, Associate Using Revit for projects since 2005 Multidisciplinary project experience in full-service firm Revit management and implementation firm-wide Building families for Revit Structure Provide training for Revit Architecture and Structure

Agenda Modeling Philosophy Core PT Tendon Families Development Nested Family Use and Completed Families Modeling Parking Structure and Use of Families Documenting Model and Presentation Downstream Benefits Limitations

Modeling Philosophy: Why model PT tendons?  Modeled elements appear in all views  Modeled elements can be tagged  Modeled elements can be seen in other models  Modeled elements can be scheduled  Consistent modeling can reduce project time

Modeling Philosophy: Why model PT tendons?

Agenda Modeling Philosophy Core PT Tendon Families Development Nested Family Use and Completed Families Modeling Parking Structure and Use of Families Documenting Model and Presentation Downstream Benefits Limitations

Core Families: Hand Sketch

Core Family: Single Span

Core Family: Limitations Category Parabola 10 foot limitation

Core Family: End Span

Core Family: Straight

Core Family: Anchorage

Agenda Modeling Philosophy Core PT Tendon Families Development Nested Family Use and Completed Families Modeling Parking Structure and Use of Families Documenting Model and Presentation Downstream Benefits Limitations

Nested Family: Multi-Span Slab Tendons

Completed Family: Slab Tendons

Completed Family: Straight Tendons

Completed Family: Beam Tendons

Agenda Modeling Philosophy Core PT Tendon Families Development Nested Family Use and Completed Families Modeling Parking Structure and Use of Families Documenting Model and Presentation Downstream Benefits Limitations

Use in Project: Parking Garage

Use in Project: Modeling the PT

Use in Project: Modeling mild Reinforcement

Agenda Modeling Philosophy Core PT Tendon Families Development Nested Family Use and Completed Families Modeling Parking Structure and Use of Families Documenting Model and Presentation Downstream Benefits Limitations

Use in Project: Documentation  Graphical representation in plan views  Stressing End  Dead End  Tags  Report CGS values at mid-span and supports  Report Stressing force

Use in Project: Documentation  Traditional vs. Modern Plans

Use in Project: Documentation  Detailing Stressing End Dead End

Agenda Modeling Philosophy Core PT Tendon Families Development Nested Family Use and Completed Families Modeling Parking Structure and Use of Families Documenting Model and Presentation Downstream Benefits Limitations

Downstream Benefits: Schedules

Agenda Modeling Philosophy Core PT Tendon Families Development Nested Family Use and Completed Families Modeling Parking Structure and Use of Families Documenting Model and Presentation Downstream Benefits Limitations

Modeling versus Drafting File Size Core Family Reinforcement category Parabola Modeling with Completed family Warped and sloped slabs Can’t do clash detection between PT and rebar Documentation Elevation at CGS

Conclusion Modeling Philosophy Modeling Post Tensioning Documentation Benefits

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