chris French wrote:
My Dad has asked me to go over and help fix up a cupboard in their
garage. The garage is a prefabricated concrete affair AFAICR. He tried
drilling it with his normal hammer drill but had no impact.

I'm taking my SDS over, but I'm wondering if attempting to drill it is
the best way, any other suggestions?

I should go very easy if you're drilling it, a "normal" hammer drill
should be OK unless you hit a bit of metak re-inforcing bar - if you
use a high-energy SDS you may crack panels, they're surprisingly thin.

Make sure all panels are held on properly, someimes internal (4x2
sheet steel with a hole in the middle) plates go missing. Use galvanized
bolts, head outside, not BZP.