Trade contractor
Also: Subcontractor, Sub, Specialty contractor
Quick definition: A specialist firm that performs one part of the work — such as mechanical, electrical, masonry or curtain wall — under a contract with a general contractor, construction manager or owner.
Explanation
Beginner explanation
Trade contractors are the specialists: the companies that actually install the ductwork, wiring, drywall or roofing. Usually they work for the general contractor as subcontractors.
Technical explanation
When a trade contractor works for a GC it is a subcontractor; on construction management projects it may contract directly with the owner (in Canada, typically under CCDC 17). Trade contractors often produce shop drawings and fabrication models, and on BIM projects they are appointed parties with their own TIDPs. Prompt payment legislation sets deadlines for payment down the contract chain to trades.
Practical example
The sheet-metal trade contractor produces a fabrication-level duct model from the engineer's design model, coordinates it in weekly clash sessions and uses it to drive its shop's cutting machines.
Why it matters
Most construction work and much of the detailed model content comes from trades, so their contracts, payment and information requirements shape project outcomes.
Standards and references
- CCDC contract documents (catalogue). Canadian Construction Documents Committee (CCDC).Widely accepted professional interpretation
Supports: CCDC 17: stipulated price contract for trade contractors on construction management projects · Status: Catalogue lists CCDC 2 (2020), 3 (2016), 4 (2023), 5A/5B (2025), 11 (2019), 14/15 (2026), 17 (2025), 18 (2023), 30 (2025), 31 (2020), 32/33 (2026).
VDC Stack.io writes its own explanations and does not reproduce copyrighted standards text. Consult the cited standard for normative wording.
Cite this entry
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VDC Stack.io. (2026). Trade contractor. In VDC Stack.io Knowledge Dictionary. Retrieved from https://vdcstack.io/dictionary/trade-contractor/