How do i properly support a new beam when removing a load-bearing wall in a 1950s Moncton bungalow with a crawl space below?

Removing a load-bearing wall in a 1950s Moncton bungalow requires temporary support during construction and permanent beam installation — this is absolutely not a DIY project and requires both a structural engineer and building permit from the City of Moncton.

Your 1950s bungalow likely has 2x8 or 2x10 floor joists spanning 12-16 feet, with the load-bearing wall supporting both the floor above and potentially roof loads. The crawl space actually makes this project more complex because you'll need to install posts and footings below the new beam.

The Engineering and Permit Process

Start with a structural engineer — they'll calculate the required beam size (likely a steel I-beam or engineered lumber beam like a glulam), specify footing requirements, and provide stamped drawings. In Moncton's clay soils, new footings typically need to extend 4+ feet below grade to get below the frost line. The engineer will also determine if your existing foundation walls can handle the new point loads or if reinforcement is needed.

City of Moncton building permit is mandatory for this work. Contact Planning & Development at (506) 856-4375 or visit moncton.ca. You'll need the engineer's drawings, contractor information, and permit fees. The city will require inspections at multiple stages — footing excavation, concrete pour, framing, and final.

Temporary Support Strategy

Before touching that wall, you need a temporary support system. Professional contractors typically install adjustable steel posts (4-6 posts depending on span) placed 3-4 feet on either side of the wall being removed. These posts support temporary beams (usually doubled 2x10s or steel) that carry the load while the permanent beam is installed.

Critical safety point: The temporary supports must be properly sized and positioned based on your home's specific load paths. A structural failure during demolition can cause catastrophic damage and injury.

Installation Process

Once temporary supports are in place, the process involves excavating for new footings in the crawl space (backbreaking work in tight quarters), pouring concrete footings, installing permanent posts, setting the new beam, and connecting everything properly. The beam connections to existing structure require specific hardware and techniques.

Expect costs of $8,000-$15,000+ for a typical 12-16 foot span — including engineering ($1,200-$2,000), permits ($300-$500), excavation, concrete, steel beam, posts, and professional installation. Moncton's clay soils can add complexity if drainage or underpinning issues arise.

Next step: Contact a structural engineer first — they can assess your specific situation and provide the calculations required for permitting. Browse licensed contractors experienced in structural work through our New Brunswick Construction Network directory, and verify they carry WorkSafeNB coverage before starting.

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