... and long life span. III. Easy to install. IV, TUV, SGS. You are warmly welcome to visit our website www.shelter-structures. ... rainproof, anti-fungus, weatherproof, flame retardant (DIN4102 B1/M2);3, Steel components: hot-dip galvanized steel, the thickness over 60um ... free span space;2, very easy and very fast to install and dismantle;3, rainproof, fire retardant, UV-protection, can be environmentally ...