Introduction of Frame Large Sport Tent for All Season The Polygon Tents roof beam connect a plurality of aluminum alloy beam together and composed of polygon. The Polygon Tent Seriesclear span of the is 10m, 12m, 15m, 18m, 20m, 25m, 30m, 40m, 50m, 60m, the side height of the 40m, 50m, 60m is 5m, bay distance is 5m, the length can be increased or decreased by 5m without limit. (more…)