Explore the Specifications
Study CSI MasterFormat divisions with cheat sheets, videos, takeoffs, and key definitions — all in one place.
📑 Division 00
Procurement & Contracting Requirements
📘 Division 01
General Requirements
🌐 Division 02
Existing Conditions
🧱 Division 03
Concrete
🧱 Division 04
Masonry
🔩 Division 05
Metals
🪵 Division 06
Wood, Plastics, and Composites
🌧️ Division 07
Thermal and Moisture Protection
🚪 Division 08
Openings
🎨 Division 09
Finishes
🛠️ Division 10
Specialties
⚙️ Division 11
Equipment
🪑 Division 12
Furnishings
🏗️ Division 13
Special Construction
🚡 Division 14
Conveying Equipment
🔥 Division 21
Fire Suppression
🚿 Division 22
Plumbing
❄️ Division 23
Heating, Ventilating & Air Conditioning (HVAC)
🧠 Division 25
Integrated Automation
⚡ Division 26
Electrical
📡 Division 27
Communications
🔒 Division 28
Electronic Safety and Security
⛏️ Division 31
Earthwork
🌿 Division 32
Exterior Improvements
💧 Division 33
Utilities
🚉 Division 34
Transportation
🌊 Division 35
Waterways and Marine Construction