The CSI MasterFormat Lookup tool lets subcontractors search construction specification divisions and sections by number, keyword, or trade name. MasterFormat is the industry standard for organizing construction specs and bid documents, with 50 divisions covering all construction work.
Search MasterFormat Divisions
Search by division number, section title, or trade name (e.g., “plumbing”, “03 30”, “electrical”).
Enter a division number, spec section title, or trade alias
All MasterFormat Divisions
Example
An electrical subcontractor wants to find all CSI sections related to their trade when reviewing a bid package.
How to Use This Tool
- 1Type a CSI division number (e.g., "03"), keyword (e.g., "concrete"), or trade name (e.g., "electrical").
- 2Browse the filtered results showing division numbers, section titles, and trade mappings.
- 3Click any section to see its sub-sections and common scope items.
How to Apply the Results
Use the matched divisions to set up trade filters in bid search, identify which spec sections apply to your scope, and communicate clearly with GCs about what work you cover.
Frequently Asked Questions
Map chosen trades into Sub-Hub automatically
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