Preface
Foreword
1 Scope
2 Definitions
3 Reference Publications
4 Certification
4.1 Noise Barrier System
4.2 Noise Barrier Manufacturer/Fabricator
4.3 Project-Specific Design Details (Shop Drawings and
Related Documents)
4.4 Noise Barrier Installation
5 Design
5.1 General
5.2 Acoustics
5.2.1 Sound Transmission Class (STC)
5.2.2 Noise Reduction Coefficient (NRC)
5.3 Expansion Joints
5.4 Height
5.5 Panel Orientation
5.6 Panels with Fire Hose Access Openings
6 Materials
6.1 General
6.2 Coatings
6.3 Test Requirements for Coatings
6.3.1 Accelerated Weathering
6.3.2 Corrosion Resistance (Salt Fog Exposure)
6.3.3 Accelerated Weathering Test
6.3.4 Corrosion Resistance Test
6.4 Concrete Panels and Posts
6.4.1 Cast-in-Place
6.4.2 Precast
6.5 Steel Reinforcing
6.6 Glazing Material
6.7 Metal Components
6.8 Steel Panels
6.9 Sound-Absorptive Filler Material
6.10 Wood Components
6.11 Brick and Masonry
7 Installation
7.1 General
7.2 Tolerances
7.3 Footings
7.3.1 General
7.3.2 Footings for Posts in Earth
7.3.3 Footings for Posts in Rock
7.3.4 Concrete in Cast-in-Place Footings
7.4 Galvanizing
7.5 Calking and Flashings
7.6 Site Grading and Preparation
7.7 Field Welds
7.8 Height
7.9 Stepping of Panels
7.10 Granular Backfill and Select Subgrade Material
7.11 Masonry Walls
8 Safety
8.1 Traffic Protection during and after Construction
8.2 Fire Hydrant Access
8.3 Overhead High-Voltage Lines
9 Other Considerations
9.1 Aesthetics
9.1.1 Termination Points
9.1.2 Vegetation
9.1.3 Visual Relief
9.2 Maintenance
9.3 Underground Utilities and Drainage Crossings
10 Footing and Structural Design
10.1 Footing Design
10.2 Structural Design
Appendices
A - Structural Design Notes
B - Predicting and Determining Acoustical Performance
C - Certification
D - Bibliography