This video shows the versatility of the Zipper truck system. We are able to create tunnels with openings very quickly with no permanent support work. This arch can be used as a mining reclaim tunnel or storage vault with top access.
Update: February 19, 2015. I'd like to thank EVERYONE for their interest and great comments and suggestions regarding our brand new system. If you're a loader operator in the Cascadia area near Vancouver, BC or anywhere else in North America, we'd like to hear from you. We're looking for Engineers with experience in compressive structure design who are familiar with finite element analysis. We can provide drafted digitally protected versions of the entire system for you to play with. If you are interested, please contact us through our website at http://www.LockBlock.com
P.S. The loader operator's head has probably grown about 50 sizes thanks to all of your wonderful comments. In addition, the cowboy hat is a safety rated hard hat.