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For more than a century, CSA S6, Canadian Highway Bridge Design Code (CHBDC), has specified the requirements for designing small, medium, and large-span highway bridges in Canada. The new 2025 edition marks a pivotal evolution in how bridges are designed to endure not just today’s environmental conditions but those projected for the decades ahead.
Highway bridges are among the most durable public assets, with design lives often exceeding 75 years. To safeguard these long-lived structures as Canada’s climate is warming at more than twice the global average, the new edition of CHBDC introduces comprehensive provisions for climate resilience, sustainability and durability. These updates shift Canadian bridge design from a reliance on historical data to a forward-looking, risk-based approach rooted in the latest climate science.
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