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The release of MasterFormat® 2026 continues CSI’s stewardship of the most widely used specifications classification system, supporting clearer organization, stronger coordination, and more consistent …

This EULA provides a license for end users to use MasterFormat to document and deliver construction projects. For any commercial use in a derivative product or resource that employs MasterFormat …

The lookup for numbers and titles—which had not fully updated to accommodate MasterFormat 2020—has been taken offline. Additional information will be shared as soon as we anticipate a new …

MasterFormat® 2020: A Master List of Titles and Numbers for the Construction Industry is now available from CSI. Keep current, get the latest edition. MasterFormat is a taxonomy that breaks down and …

First, time your transition properly. There will be a workload cost associated with updating documents and information organized using MasterFormat, so identify all of the affected resources and estimate …

MasterFormat is the architecture, engineering, and construction (AEC) industry’s gold standard for organizing and communicating specifications and work results for construction projects.

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These major advancements transform the industry’s shared language—MasterFormat®, UniFormat®, and OmniClass®—from static publications into always-updated, connected resources designed for …