If you require the definitive, fully up-to-date version of the standard, the only official source is the itself. This is a proprietary, copyrighted product, and obtaining the complete digital file requires purchase. The official CSI MasterFormat 2020 Edition is available for purchase directly from the CSI website in a few formats.
If you are still using MasterFormat 2004 or 2016, you are missing critical section numbers that modern GCs and estimators expect.
Your estimator is using 2020. Your architect is using 2016. Your steel fabricator is using 2004. Disaster.
⚠️ This is a native Excel download. It contains no definitions, only section numbers/titles.
| Column A | Column B | Column C | Column D | | :--- | :--- | :--- | :--- | | | Division Title | Section Number | Section Title | | 01 | General Requirements | 01 10 00 | Summary | | 01 | General Requirements | 01 25 00 | Substitution Procedures | | 03 | Concrete | 03 30 00 | Cast-in-Place Concrete |
A helper column identifying if the row is Level 1 (Division), Level 2, or Level 3. This allows you to apply multi-level data filtering.
Data networks, audio-video, and voice systems.