Stuck pallets have been a major safety concern for decades. Unfortunatly, employees continue to enter jammed locations useing only pallets as a walking surface and a Y-lanyard. Not only is this very dangerous and unstable, I don't know of any industrial racking that has engineered tie off locations built into their systems. The MARC (maintenance and Retrieval cart) has engineered tie off locations and is custom designed with safety features that keep it from tipping or coming away from the Rack rails. There is no limit to how deep into a racking system the MARC can go. It is a virtual safety cage that safely takes it's operator to the jammed location. I have personally used the MARC in several pallet jams situations that took me at least 30 pallet spots into the racking system. As far as I know, there is only one manufacturer that has taken on this problem and has been working along with some major corporations on how best to solve the stuck pallet problem and how to keep there employees safe while doing the job. From a maintenance standpoint, the MARC can be included into the rack inspection programs were rack bolt torque can be checked as they do loosen after time due to vibrations etc. My recommendation would be to contact the folks at accu-flex-safety.com My contact there is Rick deJong.