No problem all you need do to still use 12mm bolts is
http://www.ramset.co.nz/Product/Deta...rop-in-Anchors
Drill a 16mm hole only 53mm deep in your ribraft and smash these in. Template the bottom of your safe with cardboard and drill where they are.
Pretty sure your ribraft is 85mm thick to the dpc.
Sent from my SM-G920I using Tapatalk
Bookmarks