Alterations and Seismic Upgrade: The Building Code as Mitigation Policy

April 14, 2015

This report addresses the question of when the building code should require seismic upgrade for a building undergoing a voluntary alteration.  It proposes the re-introduction of an optional alteration-based upgrade trigger into the national model codes, but with a customizable feature that both respects local precedents and supports local mitigation planning.

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Earthquake Engineering Research Institute

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