Skip to content The CSI (Construction Specifications Institute) maintains strict copyright over MasterFormat. A full, official Excel version is typically a paid product (e.g., from CSI or spec software like BSD SpecLink). However, free, read-only Excel/CSV versions are often available from public libraries, university construction management departments, or open source BIM communities . For your convenience, search for: "MasterFormat 2020 Numbers and Titles CSV" or check the CSI website for a sample Excel export.
While previous versions (like 2004 or 2010) were often distributed freely, the Construction Specifications Institute (CSI) now tightly controls the licensing for the 2020 edition. A legitimate, official "full" Excel download is typically —it is a paid product. csi masterformat 2020 excel download hot
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