Could you be a bit more specific ?? I have a surco safari rack mounted to the stock roof rails and the stock bars removed. I normally carry 1-3 fiberglass ladders up there, 4ft, 6' and 8' and sometimes 12'. I also stick boxes of network cable and other networking items up there with them then bungie the ladders and spiderweb the other stuff in. I don't normally put heavy items like tools up there like my drills, hand tools, etc, I keep them in the back where they are more secure. A $70 1,000 spool of cat 6 is much easier to loose then 3 milwalkee drills and a bosch hammer drill and $200 worth of masonary and 18" and 24" long drill bits...