A.C.E. Structures is the only company in the United States that offers both fixed & retractable industrial structures designed by Kopron® Because Kopron® steel & fabric structures are fully modular, they can be used to create connecting passageways between other structures, or installed next to a pre-existing building to rapidly increase storage capacity. They can also be quickly dismantled, transported to a new location, and reassembled whenever necessary.The retractable model is particularly useful for creating expandable storage spaces, for allowing free access to cranes from above, or facilitating the vertical take off & landing of helicopters directly from hangars. It can also be used to create flexible tunnels that can be quickly folded to open a passage for vehicles and then redeployed to form a connecting corridor between buildings.Kopron® structures are not just elegant, they are also truly functional. They can be equipped with special loading bays, sophisticated doorway systems, energy efficient solar panels & other state-of-the-art accessories designed to boost productivity & minimize operating costs.These structures are so robust they are built to withstand minimum wind speeds of 60 mph & support snow loads of 20 lbs. per square foot. Naturally, structures can be reinforced to resist even greater wind speeds & snow loads upon request. The rip resistant pvc fabric used for covering structures can resist 100,000 folds & is made of double woven material that is mold & mildew proof as well as class 2 fire retardant.Kopron® is so confident in the superior quality of it structures that it offers a 100% warranty on frames for 10 years starting from date of purchase and a sliding warranty of up to 6 years on the fabric.