The 2020 edition remains the most current version for organizing construction specifications into 50 standardized divisions. : General Requirements & Facility Construction
The official CSI MasterFormat 2020 edition in Excel format is primarily available through a paid license from the Construction Specifications Institute (CSI) csi masterformat 2020 excel download exclusive
Level 2 | 51 00 00 | Janitorial Services Level 3 | 51 10 00 | Daily Trash Removal Level 4 | 51 10 10 | Confidential Paper Shredding The 2020 edition remains the most current version