The length can be extended by 5m bay such as 30m,40m,50m...Customized size is available. 
Frame struss: hard pressed extruded aluminium 6061/T6(15HW) which can last more than 30 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 
Allowed temperature condition: -50 degree Celsius~+80 degree Celsius 
Wind load: max. 100km/h (can be reinforced) 
Snow load: 95kg/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.