Aviation Event Management     The clear-span structure is streamline in appearance and has a sleek style due to the design of the large metal arches that stretch from side to side. These arches can be 8' to 12' apart and are anchored with large auger stakes, or for more permanent use, anchored with large bolts into the foundation or floor at the base of each arch. This wonderful building may be used as a portable structure allowing about 2 to 4 days to erect and dismantle for the occasional move. More often it is used as an intermediate or permanent building. The extra-heavy 28 oz. coated polyvinyl material is the best in the industry. Each panel of vinyl material is fastened between the sides of two arches. There are open ribs for the edges of the material to slip into. Then the panels slide up and over, all the way to the other side. Stress is put between the arches tightening the panels and adding stress resistance. These structures can withstand up to 130 mph winds. The life span is approx. 15 to 20 years, at which point they will be re-skinned. The clear-span can also have doors, windows, and even large commercial truck size garage doors to pass vehicles through. Sizes may run from small 30' x 40' up to 200' x any length. Also the rounded end styles are very popular. The unique clear-span is used worldwide as churches, theaters, exhibit space, storage warehouse, casinos, schools, housing, sports activities, ice rinks, etc.