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00 00 00 Procurement and Contracting Requirements
01 00 00 General Requirements
02 00 00 Existing Conditions
03 00 00 Concrete
04 00 00 Masonry
05 00 00 Metals
06 00 00 Wood, Plastics, and Composites
07 00 00 Thermal and Moisture Protection
08 00 00 Openings
09 00 00 Finishes
10 00 00 Specialties
11 00 00 Equipment
12 00 00 Furnishings
13 00 00 Special Construction
14 00 00 Conveying Equipment
21 00 00 Fire Suppression
22 00 00 Plumbing
23 00 00 Heating, Ventilating, and Air Conditioning (HVAC)
25 00 00 Integrated Automation
26 00 00 Electrical
27 00 00 Communications
28 00 00 Electronic Safety and Security
31 00 00 Earthwork
- 31 01 00 Maintenance of Earthwork
- 31 05 00 Common Work Results for Earthwork
- 31 06 00 Schedules for Earthwork
- 31 08 00 Commissioning of Earthwork
- 31 09 00 Geotechnical Instrumentation and Monitoring of Earthwork
- 31 10 00 Site Clearing
- 31 20 00 Earth Moving
- 31 30 00 Earthwork Methods
- 31 40 00 Shoring and Underpinning
- 31 50 00 Excavation Support and Protection
- 31 60 00 Special Foundations and Load-Bearing Elements
- 31 70 00 Tunneling and Mining
32 00 00 Exterior Improvements
33 00 00 Utilities
34 00 00 Transportation
35 00 00 Waterway and Marine Construction
40 00 00 Process Integration
41 00 00 Material Processing and Handling Equipment
42 00 00 Process Heating, Cooling, and Drying Equipment
43 00 00 Process Gas and Liquid Handling, Purification, and Storage Equipment
44 00 00 Pollution Control Equipment
45 00 00 Industry-Specific Manufacturing Equipment
48 00 00 Electrical Power Generation

Divisions > 31 70 00 Tunneling and Mining > 31 00 00 Earthwork >

31 72 00	Tunnel Support Systems
Includes	supports put in place as tunnel excavation proceeds.

31 72 00	Tunnel Support Systems
31 72 13	Rock Reinforcement and Initial Support
31 72 16	Steel Ribs and Lagging

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