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When an existing building or other structure is enlarged or otherwise altered, all portions thereof affected by such enlargement or alteration shall be strengthened, if necessary, so that all loads will be supported safely without exceeding the allowable stresses (or specified strengths, when appropriate load factors are applied) for the materials of construction in the structural members and connections.
(Prior code § 68-1.4; Added Coun. J. 11-29-89, p. 8387)