*Frame: hard pressed extruded aluminium 6061/T6(15HW) which can last 15-20 years. *Fabric cover: high quality double PVC-coated polyester textile, 100% waterproof, flame retardant to DIN4102 B1, M2, CFM, UV resistant, tear resistant, self-cleaning ability, etc. *Connector: strong hot-dip galvanized steel *Wind load: max.100km/h (can be reinforced) *Snow load: 25kg/sqm (snow can't stay if use big degree roof pitch design) *Easy to be assembled and dismantled, movable. *No pole inside, 100% available interior space.