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IEBC 2015 Alteration Level 3

IEBC 2015 Alteration Level 3

IEBC 2015 Alteration Level 3

Please refer to IEBC 2015 section 907.4.1 regarding existing structural elements resisting lateral loads:

"An engineering evaluation and analysis that establishes the structural adequacy of the altered structure shall be prepared by a registered design professional and submitted to the code official."

Do you interpret this section to mean that during a level 3 alteration the building's lateral system must be modernized, regardless of whether any lateral-resisting elements are affected by the alterations? This provision seems to eliminate the 10% allowance given in other sections of the code. Should the analysis include the ultimate loads from IBC 2015? This seems like a prohibitively costly provision

RE: IEBC 2015 Alteration Level 3

I think I answered my own question. Section 907.4.4 allows "Limited structural alterations" to be reviewed in accordance with section 807.5. The 10% allowance applies to these situations.

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