The primary barrier to these upgrades remains a complex mix of financing hurdles and technical uncertainty. According to Kyle Tourjé, executive vice president at Alpha Structural, many owners operate under the misconception that existing reinforcing steel guarantees safety. In reality, older concrete structures often lack the ductile detailing required to dissipate energy during intense shaking, leading to brittle failures regardless of the amount of steel present.
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Los Angeles Concrete Buildings Face Seismic Risk Gap
More than a decade after Los Angeles mandated seismic retrofits for non-ductile concrete buildings, fewer than 15% of affected properties have submitted plans. This slow progress leaves thousands of structures vulnerable to catastrophic failure, a reality underscored by the destruction of 225,000 buildings in Colombia’s recent magnitude 7.4 earthquake.
Buildings permitted before January 13, 1977, fall under the city’s retrofit ordinance, yet a permit date does not dictate a building’s specific risk profile. Detailed engineering assessments—including material testing and reinforcement mapping—are required to identify structural irregularities in columns, beams, and joints. Tourjé notes that while regulatory deadlines drive compliance, they do not resolve the underlying life-safety issues. Property owners must prioritize engineering evaluations to determine the actual scope of risk before a seismic event forces urgent, reactive decisions.
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