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A406.3.5 Strength of Concrete
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All existing concrete footings shall be permitted to be assumed to be plain concrete with a compressive strength of 2,000 pounds per square inch (13.8 MPa). Existing concrete compressive strength taken greater than 2,000 pounds per square inch (13.8 MPa) shall be verified by testing, record drawings or department records.
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A406.3.5 Earthquake Hazard Reduction in Existing Woodframe Residential Buildings With Soft, Weak or Openfront Walls, Strength of Concrete
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Existing Building Code 2009 of Pennsylvania > A4 Earthquake Hazard Reduction in Existing Woodframe Residential Buildings With Soft, Weak or Openfront Walls > A406 Materials of Construction > A406.3 Existing Materials > A406.3.5 Strength of Concrete
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