Planning to remove, relocate, or create an opening in a load-bearing wall in Montreal? A structural engineer must evaluate the existing load path, calculate the loads, and design the new beam, posts, connections, and supports. Metra Consultation provides the engineering analysis and drawings required for safe construction and permit applications.
Engineering services for load-bearing walls
A load-bearing wall transfers floor, roof, or upper-storey loads to the foundation. Removing it without proper design may cause cracking, floor deflection, damage, or instability. Our work is tailored to the existing building and the proposed opening.
- Site visit and existing-condition measurements
- Review of framing direction, spans, supports, and load paths
- Design of beams, posts, connections, and bearing details
- Review of foundations or framing below concentrated loads
- Signed and sealed structural drawings
- Temporary shoring requirements when applicable
- Responses to municipal technical comments
- Construction review or compliance letter when included
Typical wall-opening projects
Common projects include opening a wall between a kitchen and living room, installing a patio door, creating an exterior opening, replacing a wall with a flush or dropped beam, changing a staircase, and reorganizing the layout of a house, duplex, or triplex.
Our process
- Initial information: photos, dimensions, available drawings, and desired opening.
- Site visit: verification of framing, materials, levels, supports, and visible constraints.
- Structural design: load calculations and selection of an appropriate wood or steel solution.
- Engineering drawings: details required for the permit and contractor.
- Construction support: technical coordination and inspection if included in the scope.
Project example: removal of two load-bearing walls
Our portfolio includes the structural design for removing two load-bearing walls and replacing them with an engineered beam-and-column system, supported by permit drawings. For each new opening, the design must address the replacement members, their connections and the construction receiving the concentrated loads below.
See the wall-removal project photos. For a broader renovation or addition, see our residential structural engineering services in Montreal. For municipal documentation, see engineering plans for permits.
Permit drawings
Requirements vary by municipality and project. Structural modifications commonly require signed and sealed engineering drawings. Our documents identify the existing structure, demolition limits, proposed members, connections, supports, and construction notes.
Frequently asked questions
How can I tell whether a wall is load bearing?
Joist direction is only one clue. Upper-storey walls, roof framing, foundations, previous renovations, and hidden conditions must also be considered by a qualified professional.
How much does engineering for a wall removal cost?
The fee depends on the opening width, number of storeys, available drawings, site accessibility, supporting construction, and complexity. Photos and a short project description allow us to prepare a project-specific proposal.
Does the engineer perform the construction?
Metra Consultation provides engineering services. A qualified contractor performs the work in accordance with the drawings and required temporary support measures.
Request an engineering proposal
Send the address, photographs of both sides of the wall, desired opening width, and any available plans.
Load-bearing wall removal: engineer and permit questions
Do I need an engineer to remove a load-bearing wall in Montreal?
A load-bearing wall is part of the structural system. An engineer should assess the existing conditions and design the replacement support before demolition. Municipal permit requirements can vary by borough and building type.
What will the engineer provide for a wall opening?
Depending on the project, the deliverables may include a site assessment, calculations, a beam and post design, connection details, signed and sealed plans, and field review during construction.
When should the contractor become involved?
It is useful to coordinate the contractor after the engineer has defined the structural concept and before construction begins. This allows access, sequencing and temporary support requirements to be planned clearly.
Can work start before the permit is issued?
Do not assume demolition can begin while an application is being reviewed. Confirm the permit and authorization requirements with the municipality and condominium syndicate, when applicable, before work starts.
Check current requirements: Ville de Montréal renovation requirements.
From structural concept to a buildable wall-opening detail
A wall-opening mandate is narrower than a general structural assessment and more technical than a permit-document service. The engineer must establish how the existing floor, roof or upper-storey loads are carried, then design a continuous replacement load path through the beam, posts, connections and supporting construction below.
Before the site visit
- Property address and intended opening width
- Photos of both wall faces and adjacent rooms
- Available architectural or structural drawings
- Known renovations, damage or uneven floors
Construction-critical details
- Temporary support and demolition sequence, when required
- Beam, post, connection and bearing details
- Review of the floor or foundation receiving new point loads
- Field review only when included in the mandate
Related services without overlapping intent
For a broader evaluation of the building, visit our structural engineer service. If the structural solution is already defined and the main need is a municipal submission package, see engineering plans for permits. For cracks or support concerns below the wall, see foundation engineering.