New or enlarged openings
Doors, windows, passages, service penetrations, and slab cuts in existing buildings.
Consultation
Opening Modification Consultation
Use this page when a project involves a new or enlarged opening in an existing building and the structural implications are not yet fully defined.
What we need to understand early
The opening location, the existing structural system, whether the element is load-bearing, and whether the project is changing more than the visible finish opening. Even a small cut can affect support conditions, temporary stability, and filing expectations.
Common consultation topics
Support framing questions
Lintels, headers, trimmers, localized steel, and the receiving structure around the opening.
Occupied-building sequencing
Field constraints and temporary-condition questions that need to be understood before demolition starts.