How to Read OmniClass

How to Read OmniClass

To read OmniClass, you need access to current, authoritative table classifications. Here's how to read OmniClass properly.

How to Read OmniClass: Step-by-Step

1. Get Licensed Access — The Construction Standard is the authorized licensing authority for OmniClass, designated by CSI. Licensed access includes CSI Dynamic Standards (OmniClass as part of a connected, edition-aware system), the platform (live lookup tool with search, cross-references, and edition tracking), and always-current data that reflects the latest CSI-approved classifications.

2. Read OmniClass — Use the platform to search, browse, and reference OmniClass data.

3. Read — The platform lets you search by table number, entry code, or classification keyword, browse the full OmniClass hierarchy, see edition history and what changed between editions, and cross-reference to MasterFormat and UniFormat.

Why Read OmniClass the Right Way Matters

Using OmniClass properly — with licensed, current data — matters because:

• Stale data causes errors — OmniClass is updated regularly by CSI; using outdated classifications causes specification errors, RFIs, and coordination failures
• Unauthorized use creates legal risk — OmniClass is proprietary intellectual property; using unauthorized copies violates CSI's rights and creates legal liability
• No cross-references — Licensed access through The Construction Standard includes governed crosswalks between OmniClass and the other CSI standards — something no unauthorized copy provides

Get Started

The Construction Standard provides licensed access to OmniClass through CSI Dynamic Standards. This is how to read OmniClass the right way — with current, authorized, cross-referenced data.