CSI MasterFormat divisions
MasterFormat sorts construction work into numbered divisions. The Project Manual follows the same order. This list has the 35 divisions in use, with what each one covers. Select a division to see who bids it and what to check.
Procurement and contracting
- 00Procurement and Contracting Requirements
- Division 00 holds the bidding and contract documents: the invitation to bid, the instructions to bidders, the bid form, the bonds and the conditions of the contract.
General requirements
- 01General Requirements
- Division 01 sets the rules that apply to every trade on the job: submittals, substitutions, alternates, allowances, schedule, temporary facilities, cleanup and closeout.
Facility construction
- 02Existing Conditions
- Division 02 covers what is on the site before new work starts: surveys, assessment, demolition, and the removal of hazardous materials.
- 03Concrete
- Division 03 covers concrete work: formwork, reinforcing, cast-in-place concrete, precast concrete, finishing and curing.
- 04Masonry
- Division 04 covers unit masonry: brick, concrete block, stone, mortar, grout, reinforcing and masonry accessories.
- 05Metals
- Division 05 covers structural steel, steel joists, metal deck, cold-formed metal framing, metal stairs, railings and miscellaneous metals.
- 06Wood, Plastics, and Composites
- Division 06 covers rough carpentry, sheathing, wood trusses, finish carpentry, architectural woodwork and casework.
- 07Thermal and Moisture Protection
- Division 07 covers what keeps water and heat where they belong: waterproofing, insulation, roofing, siding, flashing, firestopping and joint sealants.
- 08Openings
- Division 08 covers doors, frames, door hardware, windows, storefronts, curtain walls, glazing and louvers.
- 09Finishes
- Division 09 covers interior finishes: metal framing, gypsum board, tile, acoustical ceilings, flooring, wall coverings and painting.
- 10Specialties
- Division 10 covers the specialties: signage, toilet compartments, toilet accessories, lockers, fire extinguishers and cabinets, wall protection, and visual display boards.
- 11Equipment
- Division 11 covers building equipment: food service, athletic and gymnasium, laboratory, residential appliances, loading dock and audio-visual equipment.
- 12Furnishings
- Division 12 covers furnishings: window treatments, manufactured casework, countertops, furniture, fixed seating and telescoping stands.
- 13Special Construction
- Division 13 covers special construction: pools, fountains, special purpose rooms, pre-engineered buildings and special structures.
- 14Conveying Equipment
- Division 14 covers equipment that moves people and material: elevators, escalators, lifts and dumbwaiters.
Facility services
- 21Fire Suppression
- Division 21 covers fire suppression: wet and dry sprinkler systems, standpipes, fire pumps and special suppression systems.
- 22Plumbing
- Division 22 covers plumbing: domestic water piping, sanitary waste and vent, storm drainage, plumbing equipment and plumbing fixtures.
- 23Heating, Ventilating, and Air Conditioning (HVAC)
- Division 23 covers HVAC: ductwork, air devices, hydronic piping, equipment, insulation, controls, and testing and balancing.
- 25Integrated Automation
- Division 25 covers building automation: the networks, controllers and software that tie building systems together.
- 26Electrical
- Division 26 covers electrical work: conductors, raceways, wiring devices, switchgear, panelboards, transformers, grounding and lighting.
- 27Communications
- Division 27 covers communications: structured cabling, data and voice systems, audio-visual systems and paging.
- 28Electronic Safety and Security
- Division 28 covers electronic safety and security: fire alarm, access control, video surveillance and intrusion detection.
Site and infrastructure
- 31Earthwork
- Division 31 covers earthwork: site clearing, grading, excavation, fill, erosion control, shoring and special foundations.
- 32Exterior Improvements
- Division 32 covers what is built on the site surface: paving, curbs, site concrete, fences, athletic surfacing, irrigation and planting.
- 33Utilities
- Division 33 covers site utilities: water, sanitary sewer, storm drainage, fuel distribution, and site electrical and communications utilities.
- 34Transportation
- Division 34 covers transportation construction: rail, traffic signals, roadway signs and airfield equipment.
- 35Waterway and Marine Construction
- Division 35 covers work in and beside water: dredging, seawalls, docks, dams and coastal construction.
Process equipment
- 40Process Interconnections
- Division 40 covers process piping and the instruments and controls that connect process equipment in plants.
- 41Material Processing and Handling Equipment
- Division 41 covers equipment that moves and processes material: conveyors, cranes, hoists and bulk material handling.
- 42Process Heating, Cooling, and Drying Equipment
- Division 42 covers process heating, cooling and drying equipment, such as boilers, furnaces, chillers and dryers used in production.
- 43Process Gas and Liquid Handling, Purification, and Storage Equipment
- Division 43 covers equipment that handles, cleans and stores process gases and liquids: pumps, compressors, filters and tanks.
- 44Pollution and Waste Control Equipment
- Division 44 covers equipment that controls air, noise, odor and water pollution, and equipment that handles solid waste.
- 45Industry-Specific Manufacturing Equipment
- Division 45 covers manufacturing equipment that is specific to one industry, such as food, textile, plastics or electronics production.
- 46Water and Wastewater Equipment
- Division 46 covers water and wastewater treatment equipment: screens, clarifiers, aeration, filtration and disinfection.
- 48Electrical Power Generation
- Division 48 covers power generation equipment: fossil fuel, nuclear, hydro, solar and wind generation, and the equipment that goes with them.
How estimators use the divisions
A subcontractor bids one or two sections inside a division, not the whole division. Find your section number in the table of contents of the Project Manual. Then read Division 00 and Division 01, because they apply to every trade.
Some division numbers are reserved and not in use, which is why the list has gaps. The numbers here follow the 2004 and later editions of MasterFormat.
Read more: What is MasterFormat and how do CSI divisions work?