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Drilling Through Support Beam

TRUSS-the magic word.

2015 IRC
R502.11.3 Alterations to trusses.
Truss members and components shall not be cut, notched, spliced or otherwise altered in any way without the approval of a registered design professional.

Remember that the code official has not authority to make design decisions especially when it comes to analyzing structural capacity (unless he is moonlighting registered design professional.)

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