When notching or boring a solid-sawn floor joist for a pipe, which limitation applies to protect the joist's strength?

Giải thích

To keep bending strength, end notches are limited to one-fourth the joist depth and no notches are allowed in the middle third where bending stress peaks; bored holes are limited to one-third the depth and kept back from edges. Unlimited notch depth, half-depth holes anywhere, or drilling within an inch of the edge all weaken the joist beyond code limits.