{"product_id":"structural-evaluation-of-existing-steel-buildings-in-seismic-regions","title":"Structural Evaluation of Existing Steel Buildings in Seismic Regions","description":"\u003cp style=\"text-align: center;\" class=\"MsoNormal\"\u003e\u003ci\u003ePlease note that this recording is from an earlier date.\u003c\/i\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\" class=\"MsoNormal\"\u003e\u003cb\u003eWebinar  - 0.1 CEU\u003c\/b\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003eDuration: 1 hr 21 m\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003ePresented by \u003cspan data-olk-copy-source=\"MessageBody\"\u003eLucia Tirca, Ph.D., ing.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eThis session reviews the evolution of seismic design requirements in the National Building Code of Canada (NBC), focusing on Structural Design (Part 4) and Steel Design Standards (CSA S16). A large portion of Canada’s building stock predates 1970, when the first probabilistic seismic hazard map was introduced. Since then, seismic design loads have increased significantly—from a 100-year return period in 1970 to a 2475-year return period by 2005.\u003c\/p\u003e\n\u003cp\u003eTo support the evaluation and upgrading of existing buildings, NBC includes guidance in Commentary L of its User’s Guide. Buildings assessed using these guidelines are expected to meet performance levels consistent with NBC’s intent. For example, the 2005 Commentary L referenced the 1992 NRC Guidelines, which were based on a 475-year return period.\u003c\/p\u003e\n\u003cp\u003eIn 2015, Commentary L introduced three levels of seismic evaluation tied to different hazard levels, all requiring full earthquake loads without reduction. The upcoming 2025 edition will adopt a three-tiered evaluation system based on the new \u003cem\u003eSeismic Evaluation Guidelines (SEG) for Existing Buildings in Canada\u003c\/em\u003e, designed to align with ASCE\/SEI 41-2023. Tier 1 and Tier 2 focus on Life Safety, while Tier 3 supports both force-based and performance-based approaches. Case studies illustrate how existing steel buildings can be evaluated using Tier 1 and Tier 2 procedures.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eEligibility for CEUs\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eCEUs will be issued for this webinar to participants that meet the following criteria:\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003eParticipant must attend at least 75% of the webinar\u003c\/li\u003e\n\u003cli\u003eCEUs are only eligible for a participant with a 90% attention rating. In order to maximize your rating the webinar must be full screen. Working on other things while the webinar is running (i.e. not full attention) minimizes your attention rating. The webinar platform automatically tracks your rating.\u003c\/li\u003e\n\u003cli\u003eCEUs are issued to the registered contact person only (person with assigned seat)\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003e\u003cstrong\u003eNotes\u003c\/strong\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003eUpon your purchase, you will receive an email to register the participant seat(s). Assignment of your seat is necessary for webinar registration, a necessary step, even if you have purchased only one. Please check your junk folder if not in your inbox. \u003cbr\u003e\n\u003c\/li\u003e\n\u003cli class=\"MsoNormal\"\u003eWebinars are non-refundable. Access will end on November 3, 2026.\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"CISC Steel Store","offers":[{"title":"Default Title","offer_id":48833151729906,"sku":"Structural Evaluation of Existing Steel Buildings","price":80.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0475\/7848\/0808\/files\/Screenshot2026-03-05131401.png?v=1772730867","url":"https:\/\/steelstore.cisc-icca.ca\/products\/structural-evaluation-of-existing-steel-buildings-in-seismic-regions","provider":"CISC Steel Store","version":"1.0","type":"link"}