Part of CSI Dynamic Standards
MasterFormat®
MasterFormat® is CSI’s widely used standard for organizing construction work information. It gives project teams a consistent way to reference and coordinate the information used across specifications, products, and project workflows.
MasterFormat is included in CSI Dynamic Standards alongside UniFormat® and OmniClass®. Use the CDS Platform to search the maintained standard instead of relying on an incomplete public list or static copy.
A company license is required for licensed standards access. Availability may vary by standard, edition, subscription, and licensing terms.
MasterFormat®
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CSI Dynamic Standards
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Common questions
Accessing MasterFormat®
What is MasterFormat®?
MasterFormat® is CSI’s widely used standard for organizing construction work information. It gives project teams a consistent way to reference and coordinate the information used across specifications, products, and project workflows.
What are CSI divisions in construction?
CSI divisions are the broad work-result categories used by MasterFormat to organize construction specifications and related project information. A division is the top-level context; detailed specification sections sit beneath that structure.
Are CSI codes the same as building codes?
No. “CSI codes” is common search language for construction classification numbers, especially MasterFormat references. They organize project information; they are not building regulations or code requirements.
Are the legacy 16 construction divisions still current?
The 16-division structure appears in historical project records and older MasterFormat editions. Current work should use the edition required by the project and verify its division and section references in CSI Dynamic Standards.
Where can I access MasterFormat®?
MasterFormat® is available in the CSI Dynamic Standards platform.
Is a license required for complete MasterFormat® access?
A company license is required for licensed standards access in the CDS Platform. Availability may vary by standard, edition, subscription, and licensing terms. Sign in or contact The Construction Standard to confirm access to a specific edition.
Sources and review scope
Reviewed against CSI’s public standards information for scope, terminology, and licensing context. This public guide provides orientation and does not reproduce or replace the licensed standard. Content review date: July 30, 2026.
CSI Dynamic Standards
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