Earthquake design, seismic retrofit and non-structural restraint for one of Canada’s highest-hazard seismic regions.
British Columbia’s south coast sits above three distinct earthquake sources: the Cascadia subduction zone offshore, deep in-slab events beneath the Strait of Georgia, and shallow crustal faults. That combination — plus soft delta soils through Richmond, Delta and the Fraser lowlands — makes lateral design the governing problem on a large share of BC projects. This section covers what a seismic retrofit involves and which buildings are the usual candidates, how the 2020 national hazard model changed design demands, why anchoring mechanical equipment and other non-structural components matters as much as the frame itself, and what Vancouver’s evolving seismic-risk policy means for existing building owners.
Non-structural components drive much of the damage and downtime after an earthquake. What BC expects for anchoring and bracing mechanical equipment, and who takes responsibility for the design.
Which older BC buildings need seismic strengthening, what makes an upgrade mandatory under Vancouver's Part 11, and how an assessment becomes a retrofit scope you can build.
More articles on seismic & earthquake engineering are scheduled. In the meantime, these cover adjacent ground.
A suite adds openings, not weight. What actually changes structurally when you add a secondary suite, garden suite or laneway house to a property in British Columbia.
Not every crack is a problem. How to read pattern, width and movement in a Greater Vancouver foundation, the local soil and water causes behind cracking, and what an engineer's assessment covers.
An even-handed comparison of cold-formed steel and wood framing for four- to six-storey BC buildings, from code limits and foundations to movement, envelope and panelisation.
