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OkPhotograph3603 t1_ja8wma6 wrote

I am going to assume that the beam is a structural component of the house.

If my assumption is correct, and really, why would it be made of steel if it was not, then why would you want to weaken it by drilling into it?

I would look for another way to do pullups.

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minesskiier t1_ja99hve wrote

Drilling a hole in a steel beam (or wooden beam for that matter) in the right spot will not effect the strength of the beam. That said, OP should not drill through this one.

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