EARTHQUAKE LOADS.
Philadelphia Code Subcode B, § 1613
in effectSECTION 1613 EARTHQUAKE LOADS.
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1613.2 Seismic ground motion values.
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1613.2.1 Mapped acceleration parameters.
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[Add Section B-1613.2.1.1 as follows:]
B-1613.2.1.1 Mapped acceleration parameters for Philadelphia. For the City of Philadelphia, the short period spectral response acceleration (Ss) shall be 0.20 (20%g) and the 1-second spectral response acceleration (S1) shall be 0.06 (6%g).
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Source: City of Philadelphia, The Philadelphia Code and Home Rule Charter (American Legal Publishing, codelibrary.amlegal.com)URL: https://codelibrary.amlegal.com/codes/philadelphia/latest/philadelphia_pa/0-0-0-310859Fetched: 10/27/2026