Terms of Use

Effective: July 2, 2026

By using CSICodes.us (the “Site”), you agree to these terms. If you do not agree, please do not use the Site.

What this Site is

CSICodes.us is a free, independent reference index for CSI MasterFormat® construction specification division and section numbers. It is provided as a convenience for quickly looking up code numbers and titles.

What this Site is not

MasterFormat® is a registered trademark and copyrighted publication of CSI (Construction Specifications Institute) and CSC (Construction Specifications Canada). This Site is not affiliated with, sponsored by, or endorsed by CSI or CSC, and is not a substitute for the official MasterFormat® publication. For the complete, current, and official standard, visit csiresources.org.

No warranty

The Site and its contents are provided “as is” without warranty of any kind, express or implied. We do not warrant that the information is complete, current, or error-free. Code numbers and titles may lag behind official revisions. Do not rely on this Site for contract documents, specifications, bids, or any use where accuracy is critical — always verify against the official MasterFormat® publication.

Limitation of liability

To the maximum extent permitted by law, the operators of this Site shall not be liable for any damages of any kind arising from your use of, or inability to use, the Site or its contents — including direct, indirect, incidental, consequential, or special damages, even if advised of the possibility of such damages.

Acceptable use

You may use the Site for personal and professional reference.
You may not scrape, bulk-download, or republish the Site's data or content.
You may not attempt to disrupt, overload, or gain unauthorized access to the Site or its infrastructure.

Changes

We may modify the Site or these terms at any time. Updated terms will be posted on this page with a new effective date. Continued use of the Site after changes constitutes acceptance.

Governing law

These terms are governed by the laws of the United States and the state in which the Site operator resides, without regard to conflict-of-law principles.