Proper wording of specification regarding making holes in steel beams that are not shown on drawings

We usually think of "coring" as a larger hole (to maybe pass a pipe through), made by a bit that only cuts the perimeter. If you say coring I think your leaving smaller holes out, which would typically be "drilled" or "punched", such as bolt holes.

That said, I think our notes speak generally, and forbid "field modification" on shop fabricated items/members without prior approval.

.02

We have a note forbidding the field modification as noted by mbullism. That way it's all encompassing. No modifications without approval from the engineer.

Not just the "Engineer". Should read "The Engineer of Record".

Mike McCann
MMC Engineering

If the note doesn't say structural engineer of record, the plumber may think the mechanical engineer can approve the modifications. Cuts and notches should also be prohibited. Even with such statements, don't be surprised when they put holes in the beams for safety/life lines.

"No holes, cuts, or notches are allowed in structural steel unless detailed on the structural drawings or approved by the structural engineer of record."

Why not just 'do not field cut any holes in structural steel..."