What size beam do I need to remove a load-bearing wall between basement rooms in a 1960s bungalow?

You'll need a structural engineer to determine the exact beam size, as this depends on your home's specific load conditions, span distance, and structural design. Removing a load-bearing wall without proper engineering can cause serious structural damage, sagging floors, and safety hazards.

In a typical 1960s Calgary bungalow, load-bearing walls in the basement often support the main floor joists and potentially upper floor loads. The replacement beam must carry the same loads safely. Common solutions include engineered lumber beams (LVL or PSL), steel I-beams, or built-up dimensional lumber, but the size varies dramatically based on the span and loads involved.

For a 12-foot span in a typical bungalow, you might see anything from a double 2x12 LVL beam to a 6-inch steel I-beam, but this is just an example - your situation could require something completely different. The beam size depends on the span distance, the loads being carried (just main floor vs. main floor plus second story), the species and grade of existing floor joists, and the spacing of support posts.

Calgary's building requirements are strict about structural modifications. Under the Alberta Building Code, removing or modifying load-bearing elements requires both a building permit and structural drawings stamped by a Professional Engineer (P.Eng). The City of Calgary requires these engineered drawings before issuing permits for load-bearing wall removal. You'll also need inspections during installation to ensure the beam is properly supported and connected.

The process involves several steps: First, hire a structural engineer to assess the wall and design the beam replacement. They'll provide stamped drawings showing beam size, support requirements, and connection details. Next, apply for a building permit through the City of Calgary (expect 2-4 weeks processing). Finally, hire a qualified contractor to install the beam according to the engineered plans, with inspections at key stages.

Safety considerations are critical - temporary support must be installed before removing any portion of the load-bearing wall. The existing foundation must be assessed to ensure it can handle concentrated loads from the new beam supports. In Calgary's expansive clay soils, foundation issues are common in 1960s homes, so this assessment is particularly important.

Typical costs in Calgary range from $3,000-$8,000 for engineering, permits, and installation, depending on span and complexity. Steel beams cost more initially but may be more economical for longer spans. Don't attempt this as a DIY project - structural work requires professional expertise and proper permits.

Find qualified structural engineers and contractors experienced with load-bearing modifications in our Calgary Construction Network directory.