At True Bid Data, precision in estimating begins with mastery of the Construction Specifications Institute (CSI) Divisions. Whether you’re a contractor, estimator, or architect, understanding the structure of CSI’s MasterFormat is critical for accurate quantity takeoffs, cost estimation, and seamless project documentation. This article outlines the most commonly used CSI Divisions, offering a brief overview and practical insights into how each should be measured for takeoff purposes.
Division 01 – General Requirements
Description:
Covers project-wide administrative and procedural requirements including submittals, temporary facilities, quality control, allowances, and contract modifications.
Takeoff Guidance:
Typically not measured in quantities but included in the General Conditions or overhead. However, allowances, contingencies, and bonds may be calculated as a percentage of overall cost.
Division 02 – Existing Conditions
Description:
Encompasses demolition, site surveys, hazardous materials remediation, and selective removal work.
Takeoff Guidance:
- Demolition: Measured in SF, LF, or EA (e.g., 1000 SF of drywall to remove).
- Excavation/Soil Remediation: Measured in CY (cubic yards).
- Contaminated Soil Removal: May include weight (tons) and volume (CY).
Division 03 – Concrete
Description:
Covers all concrete-related work including cast-in-place, precast, post-tensioned slabs, and reinforcing.
Takeoff Guidance:
- Concrete: Measured in CY for pours; SF for slab areas.
- Rebar: Measured in tons or lbs.
- Formwork: Measured in SF of contact area.
Division 04 – Masonry
Description:
- CMU or Brick: Measured in SF or EA depending on specification.
- Mortar/Grout: Calculated as a function of block or brick co
Division 05 – Metals
Description:
Focuses on structural steel, metal decking, metal stairs, and miscellaneous metals.
Takeoff Guidance:
- Structural Steel: Measured in tons.
- Metal Fabrications (handrails, frames): Measured in LF or EA.
- Decking: Measured in SF.
Division 06 – Wood, Plastics, and Composites
Description:
Includes framing, cabinetry, millwork, and composite wood products.
Takeoff Guidance:
- Framing Lumber: Measured in LF or BF (board feet).
- Sheathing: Measured in SF.
- Casework: Measured in LF or EA.
Division 07 – Thermal and Moisture Protection
Description:
Encompasses waterproofing, insulation, roofing, and air/vapor barriers.
Takeoff Guidance:
- Roofing/Insulation/Barrier Membranes: Measured in SF.
- Sealants: Measured in LF for joints.
Division 08 – Openings
Description:
Covers doors, windows, hardware, and associated framing systems.
Takeoff Guidance:
- Doors/Frames/Windows: Measured per unit (EA).
- Glazing: Measured in SF.
- Hardware Sets: Counted by Set (EA).
Division 09 – Finishes
Description:
Covers interior finishes such as drywall, paint, flooring, ceilings, and wall panels.
Takeoff Guidance:
- Drywall, Acoustical Ceilings: Measured in SF.
- Paint: Measured in SF or LF (for trim).
- Flooring: Measured in SF or SY (square yards).
Division 10 – Specialties
Description:
Includes visual display boards, toilet accessories, signage, and fire extinguishers.
Takeoff Guidance:
- Typically measured as EA per item.
- Some items (e.g., signage) may be measured per SF or Set depending on scope.
Division 11 – Equipment
Description:
Covers institutional, athletic, and commercial equipment, such as kitchen appliances or lab equipment.
Takeoff Guidance:
- Measured as EA.
- Installation or utility connections may fall under mechanical or electrical.
Division 12 – Furnishings
Description:
Includes furniture, window treatments, and fixed furnishings like benches or lockers.
Takeoff Guidance:
Measured in LF, SF, or EA, depending on item type.
Division 21 – Fire Suppression
Description:
Focuses on sprinklers, standpipes, and other suppression systems.
Takeoff Guidance:
- Piping: Measured in LF.
- Sprinkler Heads: Measured in EA.
- Valves and Cabinets: Counted per unit.
Division 22 – Plumbing
Description:
Covers water supply, drainage, and plumbing fixtures.
Takeoff Guidance:
- Pipes: Measured in LF.
- Fixtures: Measured in EA.
- Insulation: Measured in LF.
Division 23 – HVAC
Description:
Includes heating, ventilation, and air conditioning systems.
Takeoff Guidance:
- Ductwork: Measured in LF or LB (by weight).
- Equipment (AHUs, Condensers): Measured in EA.
- Controls and Accessories: EA or System-based.
Division 26 – Electrical
Description:
Covers lighting, power systems, distribution panels, and wiring.
Takeoff Guidance:
- Wiring and Conduits: Measured in LF.
- Fixtures and Devices: Measured in EA.
- Panels and Transformers: Measured in EA.
Division 27 – Communications
Description:
Includes data cabling, telecom, and low-voltage systems.
Takeoff Guidance:
- Cables: Measured in LF.
- Racks, Patch Panels: Measured in EA.
Division 28 – Electronic Safety and Security
Description:
Covers fire alarms, CCTV, access control, and intrusion detection.
Takeoff Guidance:
- Devices (Detectors, Cameras): Measured in EA.
- Cabling: Measured in LF.
Conclusion
Whether estimating a high-rise renovation or a new school campus, True Bid Data works across all CSI divisions with unmatched expertise. By structuring quantity takeoffs according to CSI standards, our team ensures clarity, accuracy, and coordination at every stage of the project lifecycle.
Need help with CSI-based estimating? Contact True Bid Data today and streamline your bids with precision.