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CSI MasterFormat division lookup

By Deviation Check Editorial Team.

Short answer

Type a CSI MasterFormat number like 09 51 00 and this tool shows which of the 23 divisions it belongs to - the first two digits set the division - what that division covers, and a link to its submittal deviation guide.

Enter a CSI MasterFormat number

Type a number like 09 51 00 above to find its division.

Every CSI MasterFormat number starts with a two-digit division. Division 09 is Finishes, Division 26 is Electrical, and so on down the list. This tool maps any number to its division and links you to that division's submittal deviation guide. Browse all 23 below, or type a number to decode it.

All 23 CSI MasterFormat divisions

Division 02 - Existing Conditions

02 21 00 - Surveys
02 22 00 - Existing Conditions Assessment
02 24 00 - Sampling and Testing of Existing Conditions
02 26 00 - Hazardous Material Assessment
02 41 00 - Demolition
02 42 00 - Removal and Salvage of Construction Materials
02 43 00 - Structure Moving
02 44 00 - Retaining Measures for Existing Construction
02 45 00 - Work Area Isolation
02 61 00 - Soils Remediation
02 65 00 - Underground Storage Tank Removal
02 82 00 - Asbestos Remediation
02 83 00 - Lead Remediation
02 84 00 - Polychlorinated Biphenyl (PCB) Remediation
02 85 00 - Mold Remediation

Division 03 - Concrete

03 10 00 - Concrete Forming and Accessories
03 15 00 - Concrete Accessories (waterstops, vapor retarders, joint fillers)
03 20 00 - Concrete Reinforcing
03 21 00 - Reinforcement Bars
03 22 00 - Welded Wire Reinforcement
03 24 00 - Fibrous Reinforcing
03 30 00 - Cast-in-Place Concrete
03 31 00 - Structural Concrete
03 35 00 - Concrete Finishing
03 39 00 - Concrete Curing
03 40 00 - Precast Concrete
03 41 00 - Precast Structural Concrete
03 45 00 - Precast Architectural Concrete
03 48 00 - Precast Concrete Specialties
03 54 00 - Cast Underlayment
03 60 00 - Grouting

Division 04 - Masonry

04 05 00 - Common Work Results for Masonry
04 05 13 - Masonry Mortaring
04 05 16 - Masonry Grouting
04 05 19 - Masonry Anchorage and Reinforcing
04 05 23 - Masonry Accessories (ties, anchors, flashing, weeps, control joints)
04 20 00 - Unit Masonry
04 21 13 - Brick Masonry
04 22 00 - Concrete Unit Masonry (CMU)
04 22 23 - Reinforced Unit Masonry
04 23 00 - Glass Unit Masonry
04 27 00 - Multiple-Wythe Unit Masonry
04 40 00 - Stone Assemblies
04 42 00 - Exterior Stone Cladding
04 43 00 - Stone Masonry
04 72 00 - Cast Stone Masonry

Division 05 - Metals

05 12 00 - Structural Steel Framing
05 12 23 - Structural Steel for Buildings
05 21 00 - Steel Joist Framing
05 31 00 - Steel Decking
05 31 13 - Steel Floor Decking (composite and non-composite)
05 31 23 - Steel Roof Decking
05 40 00 - Cold-Formed Metal Framing
05 41 00 - Structural Metal Stud Framing
05 50 00 - Metal Fabrications (miscellaneous metals)
05 51 00 - Metal Stairs
05 52 00 - Metal Railings
05 58 00 - Formed Metal Fabrications
05 73 00 - Decorative Metal Railings

Division 06 - Wood, Plastics, and Composites

06 05 00 - Common Work Results for Wood, Plastics, and Composites
06 05 73 - Wood Treatment
06 10 00 - Rough Carpentry
06 11 00 - Wood Framing
06 13 00 - Heavy Timber Construction
06 15 00 - Wood Decking
06 16 00 - Sheathing
06 17 53 - Shop-Fabricated Wood Trusses
06 18 00 - Glued-Laminated (Glulam) Construction
06 18 13 - Cross-Laminated Timber (CLT)
06 18 16 - Structural Composite Lumber (LVL, PSL, LSL)
06 20 23 - Interior Finish Carpentry
06 40 00 - Architectural Woodwork
06 40 23 - Architectural Woodwork - Standing and Running Trim
06 61 16 - Solid Polymer (Solid Surface) Fabrications
06 65 00 - Fiber-Reinforced Polymer (FRP) Fabrications

Division 07 - Thermal and Moisture Protection

07 11 00 - Dampproofing
07 13 00 - Sheet Waterproofing
07 14 00 - Fluid-Applied Waterproofing
07 21 00 - Thermal Insulation
07 21 13 - Board Insulation
07 21 16 - Blanket Insulation
07 21 29 - Sprayed Insulation
07 25 00 - Weather Barriers (air barriers, vapor retarders, WRB)
07 27 00 - Air Barriers
07 41 13 - Metal Roof Panels (standing seam)
07 52 00 - Modified Bituminous Membrane Roofing
07 53 00 - Elastomeric Membrane Roofing (EPDM, TPO, PVC)
07 54 00 - Thermoplastic Membrane Roofing
07 62 00 - Sheet Metal Flashing and Trim
07 81 00 - Applied Fireproofing
07 84 00 - Firestopping
07 92 00 - Joint Sealants

Division 08 - Openings

08 11 13 - Hollow Metal Doors and Frames
08 11 16 - Aluminum Doors and Frames
08 14 00 - Wood Doors
08 31 13 - Access Doors and Frames
08 33 23 - Overhead Coiling Doors
08 34 73 - Sound Control Door Assemblies
08 36 13 - Sectional Doors
08 41 13 - Aluminum-Framed Entrances and Storefronts
08 44 13 - Glazed Aluminum Curtain Walls
08 51 13 - Aluminum Windows
08 62 00 - Unit Skylights
08 71 00 - Door Hardware (finish hardware)
08 80 00 - Glazing
08 88 00 - Special Function Glazing

Division 09 - Finishes

Division 10 - Specialties

10 11 00 - Visual Display Units (whiteboards, tackboards)
10 14 00 - Signage
10 14 53 - Traffic Signage
10 21 13 - Toilet Compartments
10 22 13 - Wire Mesh Partitions
10 22 19 - Demountable Partitions
10 22 39 - Folding Panel Partitions
10 22 43 - Operable Partitions
10 26 00 - Wall and Door Protection
10 26 13 - Corner Guards
10 28 00 - Toilet, Bath, and Laundry Accessories
10 44 13 - Fire Protection Cabinets (fire extinguisher cabinets)
10 44 16 - Fire Extinguishers
10 51 00 - Lockers
10 55 00 - Postal Specialties
10 56 00 - Storage Assemblies
10 73 00 - Protective Covers (awnings, canopies)
10 75 00 - Flagpoles
10 81 00 - Pest Control Devices

Division 11 - Equipment

11 21 00 - Residential Laundry Appliances
11 23 00 - Commercial Laundry and Dry Cleaning Equipment
11 31 00 - Residential Appliances (multifamily)
11 40 00 - Foodservice Equipment (general)
11 42 00 - Food Preparation Equipment
11 44 00 - Food Cooking Equipment
11 46 00 - Food Dispensing Equipment
11 47 00 - Ice Machines
11 48 00 - Cleaning and Disposal Equipment (commercial dishwashers, disposers)
11 51 00 - Laboratory Equipment
11 52 00 - Laboratory Fume Hoods
11 66 00 - Athletic Equipment
11 70 00 - Healthcare Equipment
11 82 00 - Waste Handling Equipment (compactors, containers)
11 84 00 - Detention Equipment
11 91 00 - Loading Dock Equipment (levelers, shelters, seals)
11 92 00 - Parking Control Equipment (gates, ticket dispensers)

Division 12 - Furnishings

12 05 00 - Common Work Results for Furnishings
12 10 00 - Art
12 20 00 - Window Treatment (blinds, shades, drapes)
12 24 00 - Window Shading (roller shades, solar shades)
12 30 00 - Casework (cabinets, shelving, built-in units)
12 32 00 - Manufactured Wood Casework
12 34 00 - Manufactured Plastic-Laminate-Clad Casework
12 35 00 - Specialty Casework (laboratory, nurse station, reception)
12 36 00 - Countertops (solid surface, quartz, stone, plastic laminate)
12 40 00 - Furnishings and Accessories
12 48 00 - Rugs and Mats
12 50 00 - Furniture
12 51 00 - Office Furniture (systems furniture, workstations)
12 52 00 - Seating
12 59 00 - Systems Furniture
12 61 00 - Fixed Audience Seating
12 93 00 - Interior Plantscaping

Division 13 - Special Construction

13 10 00 - Special Facility Components
13 11 00 - Swimming Pools
13 17 00 - Tubs and Pools
13 18 00 - Ice Rinks
13 19 00 - Kennels and Animal Shelters
13 21 00 - Controlled Environment Rooms
13 21 13 - Clean Rooms
13 21 23 - Cold Storage Rooms
13 21 26 - Sound-Conditioned Rooms
13 28 00 - Athletic and Recreational Special Construction
13 34 00 - Fabricated Engineered Structures
13 34 19 - Metal Building Systems (Pre-Engineered)
13 42 00 - Building Modules (Modular/Prefabricated)
13 48 00 - Seismic Protection
13 48 13 - Seismic Isolation Systems
13 49 00 - Lightning Protection
13 49 21 - Radiation Protection
13 49 23 - Storm Shelters and Safe Rooms
13 49 33 - Vault Construction

Division 14 - Conveying Equipment

14 21 00 - Electric Traction Elevators
14 24 00 - Hydraulic Elevators
14 27 00 - Custom Elevators (observation, freight, special use)
14 28 00 - Machine-Room-Less (MRL) Elevators
14 31 00 - Escalators
14 32 00 - Moving Walks
14 41 00 - People Lifts (wheelchair lifts, LULA elevators)
14 42 00 - Wheelchair Lifts (vertical platform lifts)
14 45 00 - Vehicle Lifts (automotive parking systems)
14 91 00 - Facility Chutes (linen, trash)
14 12 00 - Dumbwaiters
14 71 00 - Turntables
14 84 00 - Temporary Hoisting Equipment (construction hoists)

Division 21 - Fire Suppression

21 05 00 - Common Work Results for Fire Suppression
21 05 13 - Common Motor Requirements for Fire-Suppression Equipment
21 05 29 - Hangers and Supports for Fire-Suppression Piping
21 05 48 - Vibration and Seismic Controls for Fire-Suppression Piping
21 10 00 - Water-Based Fire-Suppression Systems
21 13 13 - Wet-Pipe Sprinkler Systems
21 13 16 - Dry-Pipe Sprinkler Systems
21 13 19 - Preaction Sprinkler Systems
21 13 23 - Deluge Fire-Suppression Sprinkler Systems
21 13 39 - Foam-Water Systems
21 22 00 - Clean-Agent Fire-Extinguishing Systems
21 23 00 - Carbon Dioxide Fire-Extinguishing Systems
21 30 00 - Fire Pumps
21 31 13 - Electric-Drive, Centrifugal Fire Pumps
21 31 16 - Diesel-Drive, Centrifugal Fire Pumps
21 32 00 - Jockey Pumps
21 41 00 - Storage Tanks for Fire-Suppression Water

Division 22 - Plumbing

22 05 00 - Common Work Results for Plumbing
22 05 19 - Meters and Gages for Plumbing Piping
22 05 23 - General-Duty Valves for Plumbing Piping
22 05 29 - Hangers and Supports for Plumbing Piping and Equipment
22 05 53 - Identification for Plumbing Piping and Equipment
22 07 00 - Plumbing Insulation
22 11 13 - Facility Water Distribution Piping
22 11 16 - Domestic Water Piping
22 13 16 - Sanitary Waste and Vent Piping
22 13 19 - Sanitary Waste Piping Specialties (cleanouts, floor drains, interceptors)
22 14 13 - Facility Storm Drainage Piping
22 33 00 - Electric Domestic Water Heaters
22 34 00 - Fuel-Fired Domestic Water Heaters
22 35 00 - Domestic Water Heat Exchangers
22 40 00 - Plumbing Fixtures
22 42 13 - Commercial Water Closets (toilets)
22 42 16 - Commercial Urinals
22 42 39 - Commercial Faucets
22 42 43 - Commercial Sinks
22 47 00 - Drinking Fountains and Water Coolers

Division 23 - Heating, Ventilating, and Air Conditioning (HVAC)

23 05 00 - Common Work Results for HVAC
23 05 53 - Identification for HVAC Piping and Equipment
23 05 93 - Testing, Adjusting, and Balancing (TAB) for HVAC
23 07 00 - HVAC Insulation
23 09 00 - Instrumentation and Control for HVAC
23 21 13 - Hydronic Piping
23 23 00 - Refrigerant Piping
23 31 13 - Metal Ducts
23 33 00 - Air Duct Accessories (dampers, turning vanes)
23 34 23 - HVAC Power Ventilators (exhaust fans)
23 36 00 - Air Terminal Units (VAV boxes)
23 64 16 - Centrifugal Water Chillers
23 65 00 - Cooling Towers
23 72 00 - Air-to-Air Energy Recovery Equipment
23 73 13 - Modular Indoor Central-Station Air-Handling Units
23 81 26 - Split-System Air-Conditioners
23 82 16 - Packaged Rooftop Air-Conditioning Units (RTUs)
23 83 33 - Ductless Split Units (Mini-Splits)

Division 25 - Integrated Automation

25 05 00 - Common Work Results for Integrated Automation
25 05 11 - Integrated Automation Network Equipment
25 10 00 - Integrated Automation Facility Controls
25 13 00 - Integrated Automation Control and Monitoring Network
25 14 00 - Integrated Automation Local Control Units
25 15 00 - Integrated Automation Sensors and Transmitters
25 30 00 - Integrated Automation Facility Process Control
25 35 00 - Integrated Automation HVAC Control Sequences
25 50 00 - Integrated Automation Facility Management Systems
25 55 00 - Integrated Automation Energy Monitoring and Control
25 56 00 - Integrated Automation Lighting Control Integration
25 90 00 - Integrated Automation Commissioning

Division 26 - Electrical

26 05 00 - Common Work Results for Electrical
26 05 19 - Low-Voltage Electrical Power Conductors and Cables
26 05 33 - Raceway and Boxes for Electrical Systems
26 05 53 - Identification for Electrical Systems
26 09 23 - Lighting Control Devices
26 22 00 - Low-Voltage Transformers
26 24 16 - Panelboards
26 24 19 - Motor-Control Centers
26 27 26 - Wiring Devices
26 28 16 - Enclosed Switches and Circuit Breakers
26 29 13 - Enclosed Controllers
26 32 13 - Engine Generators
26 33 53 - Static Uninterruptible Power Supplies (UPS)
26 36 23 - Automatic Transfer Switches
26 41 00 - Facility Lightning Protection
26 51 13 - Interior Lighting Fixtures

Division 27 - Communications

27 05 00 - Common Work Results for Communications
27 05 26 - Grounding and Bonding for Communications Systems
27 05 28 - Pathways for Communications Systems
27 05 33 - Conduits and Backboxes for Communications Systems
27 05 36 - Cable Trays for Communications Systems
27 10 00 - Structured Cabling
27 11 00 - Communications Equipment Room Fittings
27 11 16 - Communications Cabinets, Racks, Frames, and Enclosures
27 11 19 - Communications Termination Blocks and Patch Panels
27 13 00 - Communications Backbone Cabling
27 15 00 - Communications Horizontal Cabling
27 15 01 - Communications Horizontal Cabling - Copper
27 15 43 - Communications Faceplates and Connectors
27 21 00 - Data Communications Network Equipment
27 41 00 - Audio-Visual Systems
27 42 00 - Electronic Digital Signage
27 51 00 - Distributed Audio-Video Systems
27 51 16 - Paging and Intercom Systems

Division 28 - Electronic Safety and Security

28 05 00 - Common Work Results for Electronic Safety and Security
28 08 00 - Commissioning of Electronic Safety and Security
28 10 00 - Electronic Access Control and Intrusion Detection
28 13 00 - Access Control
28 16 00 - Intrusion Detection
28 20 00 - Electronic Surveillance
28 23 00 - Video Surveillance
28 30 00 - Electronic Detection and Alarm
28 31 00 - Fire Detection and Alarm
28 31 11 - Digital, Addressable Fire-Alarm Systems
28 31 33 - Fire Detection Sensors (smoke, heat, duct, beam)
28 31 43 - Fire-Alarm Notification Appliances (horns, strobes, speakers)
28 31 49 - Carbon-Monoxide Detection
28 46 00 - Fire Detection and Alarm Interfaces (elevator recall, HVAC shutdown, door release)

Division 31 - Earthwork

31 05 00 - Common Work Results for Earthwork
31 10 00 - Site Clearing
31 20 00 - Earth Moving
31 23 00 - Excavation and Fill
31 25 00 - Erosion and Sedimentation Controls
31 31 00 - Soil Treatment
31 32 00 - Geosynthetics (geotextiles, geogrids, geomembranes, drainage composites)
31 35 00 - Geomembranes
31 41 00 - Shoring (soldier pile, sheet pile, secant pile)
31 43 00 - Concrete-Filled Caissons
31 50 00 - Excavation Support and Protection (tiebacks, soil nails)
31 62 00 - Driven Piles
31 63 00 - Bored Piles and Shafts

Division 32 - Exterior Improvements

32 01 00 - Operation and Maintenance of Exterior Improvements
32 11 00 - Base Courses (aggregate base, crushed stone)
32 12 00 - Flexible Paving (hot mix asphalt, HMA)
32 13 00 - Rigid Paving (portland cement concrete)
32 14 00 - Unit Paving (brick, concrete pavers, flagstone)
32 16 00 - Curbs and Gutters
32 17 00 - Pavement Markings
32 18 00 - Athletic and Recreational Surfacing (rubberized track, synthetic turf)
32 31 00 - Fences and Gates (chain link, ornamental metal, wood)
32 32 00 - Retaining Walls (segmental block, gabion)
32 84 00 - Planting Irrigation
32 90 00 - Planting
32 91 00 - Soil Preparation
32 93 00 - Plants
32 94 00 - Planting Accessories

Division 33 - Utilities

33 01 00 - Operation and Maintenance of Utilities
33 05 00 - Common Work Results for Utilities (trench, bedding, backfill)
33 10 00 - Water Utilities
33 11 00 - Water Utility Distribution Piping (DIP, PVC C900/C905, HDPE)
33 12 00 - Water Utility Distribution Equipment (hydrants, valves, meters)
33 13 00 - Disinfecting Water Utility Piping
33 30 00 - Sanitary Sewerage Utilities
33 31 00 - Sanitary Utility Sewer Piping (PVC SDR, HDPE, VCP)
33 34 00 - Sanitary Sewerage Force Mains
33 40 00 - Storm Drainage Utilities
33 41 00 - Storm Utility Drainage Piping (RCP, HDPE ADS, CMP)
33 42 00 - Culverts
33 44 00 - Storm Utility Drainage Structures (manholes, inlets, junction boxes)
33 50 00 - Fuel Distribution Utilities
33 71 00 - Electrical Utility Transmission and Distribution (conduit, ductbank)
33 81 00 - Communications Utilities (conduit, innerduct)