01 60 00 Product Requirements: Common Contradictions and RFI Guide
Product substitution and approved-equals language in Division 01 creates contradiction risk when technical sections specify manufacturer-proprietary products.
Most Product Requirements contradictions trace to the same root: the specification and the drawings are produced by different people at different stages, and never fully reconciled before the set goes out. By the time the conflict is found in the field, it is an RFI, a delay, or a change order.
Lintel cross-references section 01 60 00 against your full drawing set, schedules, and the rest of the project manual, flagging every disagreement with a citation to the exact page so it is resolved in review.
Common contradiction types
Substitution language vs. sole-source spec
A frequent product requirements conflict. Lintel reconciles the drawings against the spec to surface it with a page-level citation, so it is caught in review rather than at rough-in.
Approved products list conflicts
A frequent product requirements conflict. Lintel reconciles the drawings against the spec to surface it with a page-level citation, so it is caught in review rather than at rough-in.
Pre-approval requirement gaps
A frequent product requirements conflict. Lintel reconciles the drawings against the spec to surface it with a page-level citation, so it is caught in review rather than at rough-in.
Frequent RFIs
- Substitution not permitted per technical section
- Approved equals list not current
- Pre-approval deadline missing from spec