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Rule of thumb for drilling holes in I beam flange
I am aware that there are general rules of thumb regarding the size and placement of holes in beams.
The question was presented to me today:
Is there a general rule of thumb regarding size and placement of holes in the [I]flange [/I](not the web) of an steel I beam?
Here is the application: around christmas time, a rigger buddy wants to drill a half inch hole in the flange of a vertical I beam [U]column[/U]. He will place an eye bolt through the new hole, and using standard rigging hardware, suspend 300-400 lbs. of electrical / audio / lighting / fiber cable.
Something along the lines of this:
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Comments?