A: Building Substructure
B: Building Structure & Shell
Structure
Exterior Walls
Windows & Skylights
Doors
Roofing & Waterproofing
Passive Fire Protection
C: Building Interiors
Interior Walls & Partitions
Doors
Flooring
Ceilings
Lighting
Interior Finishes
Handrails
Stairs
Acoustical control
D: Engineering Services
HVAC
Plumbing
Electrical
Elevators and Lifts
Fire Protection & Sprinklers
Communications & Security
E: Specialties, Equipment & Furnishings
Signage
Demountable Partitions
Wall and Corner Protection
Toilet, Bath and Laundry Specialties
Awnings and Canopies
F: Special Construction
Prefab & Engineered Buildings
Ballistics Resistant Construction
Radiation Protection Construction
Site Security
G: Earthwork & Site Development
General
Earthwork & Site Utilities
Landscaping
Lighting
Site Furnishings
Fencing
Z: Common Components
Facility Construction
03: Concrete
04: Masonry and Stone
05: Metals
06: Wood, Plastics & Composites
07: Thermal & Moisture Protection
08: Doors & Windows
09: Finishes
10: Specialties
11: Equipment
12: Furnishings
13: Special Construction
14: Conveying Systems
Facility Services
21: Fire Suppression
22: Plumbing
23: HVAC
25: Integrated Automation
26: Electrical Systems
27: Communications
28: Electronic Safety & Security
Site and Infrastructure
31: Earthwork
32: Exterior Improvements
33: Site Utilities
Additional Resources on 4specs
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