Structure Technical Policies (STPs)

Structure Technical Policies (STPs) supplement design specifications by addressing areas not covered; expanding requirements based on successful past practices; and implementing more recent innovations. STPs include policies from previous Memos to Designers (MTDs) and Bridge Design Aids (BDAs). STPs supersede any similar content in the MTDs or BDAs. Content is limited to that which if not followed, requires a Design Exception by the California State Bridge Engineer.

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Structure Technical Policy (STP) Numbers and Titles  Policy Date

Section 1. Introduction

1.1 Scope, Approval, Implementation (PDF)

May 2020

1.2 Terms and Abbreviations (PDF)

July 2020

1.3 Complex Bridges

1.4 Type Selection (PDF)

November 2019

1.5 Project Specific Design Criteria

1.6 Asset Numbering

1.8 Use of XS Sheets

Section 2. General Design, Drainage, and Hydraulics

2.1 General Notes (PDF)

July 2020

2.5 Bridge Deck Drainage

2.6 Hydraulic Design for Structures Over Waterways

Section 3. Load and  Load Factors

3.1 Materials Hauling Equipment Loading

3.2 Construction Equipment Overload Reviews (PDF)

June 2020

3.3 Wind Load

Section 4. Structural Analysis and Evaluation

4.1 Live Load Distribution by Three-Dimensional Analysis

4.2 Bridges with Skewed Supports

4.3 Soundwall Load Distribution

4.4 Bridges on Curved Alignment

Section 5. Concrete Structures

5.1 Corrosion Protection for Structural Concrete Elements (PDF)

July 2020

5.2 Cast-In-Place Post-tensioned Concrete Box Girders (PDF)

July 2020

5.3 Precast Prestressed Girders

5.4 Deck Closure Pour and Associated Requirements (PDF)

July 2020

5.5 - 5.49 Reserved

5.50 Post-Installed Adhesive Anchors in Concrete (PDF)

July 2020

Section 6. Steel Structures

6.1 Identification of Steel Bridge Members (PDF)

November 2019

6.2 Steel Pedestrian Bridges (PDF)

November 2019

6.3 Catwalks on Steel Bridges (PDF)

June 2020

Section 7. Aluminum Structures (reserved)

Section 8. Wood Structures (reserved)

Section 9. Decks and Deck Systems

9.1 Stay-in-Place Precast Prestressed Concrete Deck Panels for Precast Concrete Girder Superstructures (PDF)

July 2020

9.2 Stay-In-Place Metal Forms for PC Concrete & Steel Superstructures

9.4 Deck, Overhang and Soffit Design (PDF)

August 2020

Section 10. Foundations

10.1 Substructure Type Selection

10.2 Geotechnical Deliverables for Substructure Design

10.6 Shallow Foundations

10.7 Deep Foundations

10.8 Cast-In-Concrete-Shell (CICS) Piles

10.9 Microplies

10.10 Ground Anchor

10.11 Design Data Documentation and Evaluation of Anomalous Concrete Shafts

10.12 Tip Post-Grouting of Drilled Shafts

10.13 Column Isolation Casings

Section 11. Walls, Abutments and Piers

11.1 Abutments

11.2 Integral Abutments

11.3 Seismic Design of Abutments

11.4 Permissible Horizontal Loads for Abutment Piles

11.6 Pier Wall Reinforcement

11.23 Soil Nail Walls (PDF)

February 2020

11.29 Seismic Design of Earth Retaining Systems (PDF)

August 2020

Section 12. Buried Structures

12.1 Buried Reinforced Concrete Box Structures

12.2 Capacity Evaluation of the Existing Buried Culvert Structures

Section 13. Railings

13.1 Temporary Railings

Section 14. Joints and Bearings

14.1 Bridge Bearings

14.2 Bridge Deck Joints and Seals

Section 15. Sound Barriers

15.1 Sound Wall Design Criteria

Section 16. Existing Structures (Including of Rating, Strengthing)

16.1 Widening of Existing Bridges (PDF)

February 2020

16.2 Change in Dead Load of Existing Structures (PDF)

March 2020

16.3 Widening Closed End Cellular Abutments

16.5 Permit Upgrading

16.6 Design Criteria for Strengthening Steel Girders for Live Loads

16.7 Retrofit Criteria for Bridges

16.8 Analysis of Deck Overhangs on Existing Bridges for Solid Concrete Parapet Rail Collision Forces (PDF)

August 2020

16.10 Overlays of Existing Bridge Decks

Section 17. Temporary Conditions and Structures

17.1 Design Criteria for Temporary Prefabricated Modular Steel Panel Truss Bridge (PDF)

August 2020

17.2 Site Seismicity for Temporary, Emergency, and Incomplete Bridges

Section 18. Overhead Sign Structures (reserved)

Section 19. Railways (reserved)

Section 20. Seismic Design

20.1 Seismic Design Methodology

20.2 Recovery Bridge Selection Criteria

20.3 Seismic Design Criteria for Bridge Widening

20.4 Seismic Safety Peer Review

20.5 to 20.10 reserved

20.12 Quantifying the Impacts of Soil Liquefaction and Lateral Spreading on Project Delivery

20.13 Tsunami Loads for Bridges

20.14 to 20.20 reserved

20.21 Understanding Directionality Concepts in Seismic Analysis

20.22 Analysis of Bridges that Cross Faults

20.23 Lateral Spreading Analysis for New and Existing Bridges

20.24 Nonlinear Time History Analysis

20.25 Probabilistic Damage Control Assessment (PDCA) for California State Bridges

20.26 to 20.30 reserved

20.31 Seismic Strength of Concrete Bridge Superstructures

20.32 Seismic Design of Slab Bridges

20.33 Seismic Design of Ordinary Bridges with Isolation Bearings

20.34 Precast Bridge Connection

20.35 Seismic Design Criteria for Concrete Open Spandrel Arch Bridges

20.36 Seismic Design of Shear Critical members

20.37 Application of Headed Bar Reinforcement