I have heard conflicting informatiom about drilling holes in floor joists. I have read that notching floor joists in the middle third of the span is difinately out, but that floor joists can be drilled anywhere (with the exception of on the very ends of the span) provided the hole is not too large. (I know there are guidelines for this). I have also heard that floor joists should not be drilled in the middle third of the span.
Of course I found this last bit of info after drilling my floor joists with 1 inch holes a few inches toward the end of the middle third of the span. (1 hole per joist for a wiring run, hole in the center of the joists, joists are 7 1/4).
Is drilling joists in the center third of the span ok or does this only apply to notches? Thanks.