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• ♦Manual Notice 2002-1
• ►1. Introduction
  • ►1. About this Manual
    • ♦Purpose
    • ♦Feedback
    • ►Abbreviations
• ►2. History of Bridge Inspection
  • ►1. Initial Reasons for Bridge Inspection
    • ♦Beginning of Bridge Inspection
    • ♦First Texas Bridge Inspection Program
  • ►2. Primary References
    • ♦Major Standards, Manuals, and Technical Advisories
  • ►3. AASHTO Inspection Manuals
    • ♦1970 and 1974 AASHTO Manuals
    • ♦1978 AASHTO Manual
    • ♦1983 AASHTO Manual
    • ♦AASHTO Interim Specifications
    • ♦1994 Rewrite of AASHTO Manual
    • ♦Current Status of 1994 AASHTO Manual
    • ♦1994 AASHTO Manual Omissions and Inconsistencies
  • ►4. Federal and State Inspection Procedures
    • ♦1991 Manual 90
    • ♦Texas Bridge Inspection Procedures
• ►3. Qualifications and Responsibilities of Bridge Inspection Personnel
  • ►1. Requirements
    • ♦General Requirements
    • ♦FHWA Requirements
    • ♦AASHTO Requirements
    • ♦TxDOT Requirements
  • ►2. TxDOT Bridge Inspection Personnel
    • ♦General Position Requirements
    • ♦Specific Position Requirements
    • ♦Division Manager of Bridge Inspection Operations
    • ♦Division Bridge Inspection Supervisors/Engineers or District Bridge Inspection Coordinators
    • ♦Division or District Bridge Inspection Engineers/Specialists
    • ♦Division or District Bridge Inspection Staff Specialists/Technicians
  • ►3. Bridge Inspections by Consultants
    • ♦General Requirements
    • ♦Routine Bridge Inspections
    • ♦Complex Bridge Inspections
    • ♦Pre-certification Procedures for Consultants
  • ►4. Use of the Consultant Pool
    • ♦Request for Consultant Inspection
    • ♦Work Authorization Issuance
    • ♦Managing Consultant Bridge Inspections
    • ♦Completion of Work Authorization
• ►4. Field Inspection Requirements
  • ►1. Types of Bridge Inspection
    • ♦Overview
  • ►2. Initial Inspections
    • ♦Overview
  • ►3. Routine Inspections
    • ♦Overview
    • ♦Inspection Equipment
    • ♦Interim Inspections
  • ♦4. Damage Inspections
  • ►5. In-Depth Inspections
    • ♦Reasons for In-Depth Inspections
    • ♦Underwater Inspections
    • ♦Underwater Inspection Methods
    • ♦Levels of Underwater Inspection
    • ♦Underwater Structural Elements
    • ♦Underwater Inspection Devices
    • ♦Underwater Structural Materials
    • ♦Fracture-Critical Inspections
    • ♦History of Fracture Critical Considerations
    • ♦Fatigue Failures
    • ♦Fracture-Critical Members
    • ♦Redundancy
    • ♦Inspection Procedures for FC Members
    • ♦Fatigue and Fatigue Fracture
    • ♦Fatigue-Prone Details
    • ♦Weld Details
    • ♦Fatigue in Secondary Members
    • ♦Proper Welding and Repair Techniques
    • ♦FC Inspection Techniques
  • ►6. Special Inspections
    • ♦Overview
• ▼5. Ratings and Load Posting
  • ♦1. Overview
  • ►2. Condition Ratings
    • ♦Definition of Condition Ratings
    • ♦Recording Condition Ratings
    • ♦Assigning Condition Ratings
  • ►3. Appraisal Ratings
    • ♦Definition of Appraisal Ratings
    • ♦Recording Appraisal Ratings
  • ►4. Load Ratings
    • ♦Definition of Load Ratings
    • ♦Determination of Load Ratings
    • ♦Inventory Rating and Design Load Considerations
    • ♦THD Design Supplement No. 1
    • ♦Customary Rating Procedures
    • ♦Rating Concrete Bridges with No Plans
    • ♦Examples of Rating Concrete Bridges with No Plans
    • ♦Ratings for Unusual Bridges
    • ♦H- and HS-Load Ratings
  • ►5. Legal Loads and Load Posting
    • ♦Definition of State Legal Loads
    • ♦Load Posting
    • ♦Procedures for Changing On-System Bridge Load Posting
    • ♦Procedures for Emergency On-System Bridge Load Posting
    • ♦Closure of Weak Bridges
    • ♦Off-System Bridge Closure Procedures
• ►6. Routing and Permits
  • ♦1. Overview
  • ♦2. Role of District Permit Officers, District Bridge Inspection Coordinators, and the MCD
  • ►3. Permits
    • ♦OverHeight and OverWidth Permits
    • ♦Over-weight Permit Loads
    • ♦Superheavy Loads
    • ♦Other Differences Between Overweight Permits and Operating Rating
    • ♦Overloads on Posted or Substandard Bridges
    • ♦Pre- and Post-Move Inspection
  • ►4. Example Comparison of Inventory, Operating, and Permit Loads
    • ♦Typical Continuous I-Beam Bridge
    • ♦Rating Analysis Steps
    • ♦Results for I-Beam Bridge
    • ♦Discussion of the Analysis Comparisons
• ►7. Bridge Programming
  • ►1. Basis for Bridge Rehabilitation or Replacement
    • ♦Overview
  • ►2. Federal Bridge Program
    • ♦Funding Classifications
    • ♦Qualification for Rehabilitation or Replacement
    • ♦Texas Eligible Bridge Selection System
    • ♦Structural Deficiency
    • ♦Functional Obsolescence
  • ►3. Sufficiency Ratings
    • ♦Calculation of Sufficiency Ratings
  • ►4. Bridge Management System
    • ♦Overview
• ►8. Bridge Records
  • ►1. Overview
    • ♦Summary
  • ►2. Definition of Terms
    • ♦
  • ►3. Consultant Requirements
    • ♦General Requirements
    • ♦Tools and Safety Equipment
    • ♦Email and Correspondence
    • ♦Coordination with TxDOT District
  • ►4. Coding Guidelines
    • ♦Summary of Instructions (for on-and off-system bridges)
    • ♦Multiple-Pipe Culverts (for on- and off-system bridges)
    • ♦Data Quality (for on-and off-system bridges)
    • ♦Elements Data (only for on-system bridges)
  • ►5. Forms
    • ♦General Forms Information
    • ♦Bridge Inspection Record, Old Form 1085 (for on- and off-system bridges)
    • ♦Bridge Appraisal Worksheet, Old Form 1387 (for on- and off-system bridges)
    • ♦Bridge Structural Condition History (for on- and off-system bridges)
    • ♦Bridge Inspection Follow-Up Action Worksheet (only for on-system bridges)
    • ♦Bridge Inventory Record, Old Form 536 (for on- and off-system bridges)
    • ♦Bridge Inventory Record Revision (for on- and off-system bridges)
    • ♦Channel Cross-Section Measurements Record (for on- and off-system bridges)
    • ♦Underclearance Sketch (for on- and off-system bridges)
    • ♦Bridge Summary Sheet (only for off-system bridges)
    • ♦Recommended Change in Bridge Load Zoning, Form 1083R (only for on-system bridges)
  • ►6. Calculations
    • ♦General Calculation Requirements
    • ♦On-System Bridge Calculations
    • ♦Off-System Bridge Calculations
  • ►7. Data Submittal
    • ♦General Data Submittal Requirements (for on- and off-system bridges)
    • ♦Photographs (for on- and off-system bridges)
    • ♦Electronic Media (for on- and off-system bridges)
    • ♦Presentation of Documents (for on- and off-system bridges)
    • ♦Original and Duplicate Files (for on-system bridges)
    • ♦Additional Files (for off-system bridges)
    • ♦Summary Reports (for off-system bridges)
    • ♦Summary of New Load-Posting Materials (for off-system bridges)
    • ♦Scour Records and Reports (for on- and off-system bridges)
  • ►8. The Bridge Folder
    • ♦Folder Information (for on- and off-system bridges)
    • ♦Folder Assembly (for on- and off-system bridges)
• ►A. State and Federal Regulations
• ►B. Bridge Inspection Data
  • ►1. Creating and Submitting Transactions for Update
    • ♦Introduction
    • ♦Transactions Created by Consultants
    • ♦Transactions Created by Districts
  • ►2. Importing Mainframe Bridge Inspection Data into Microsoft Access
    • ♦Procedure
  • ►3. Bridge Inspection Database
    • ♦Data Structure
    • ♦Inspection Database Blocked Fields (as of January, 2000)
  • ►4. Error Messages for File Edit Program
    • ♦Error Messages
• ►C. Links to Coding Guidelines
• ♦Index

Chapter 5: Ratings and Load Posting

Section 1: Overview

This chapter includes discussion of the following topics:

• Condition Ratings
• Appraisal Ratings
• Load Ratings
• Legal Loads