... designed aluminum structure tent 2. factory price & high quality 3. clear span: 15m, 18m, 20m, 25m, 30m This ... 25m, 30m.2) Length: no limite, extended by +5m.3) Bay distance: 5m4) Eave height: 4m2. FRAME PART1) ... all steel parts are well hot-dip galvanized. 3. COVER PART 1) The roof and sidewall fabric cover ... The fabric is good at waterproof and UV resistant. 3) The fabric is flame retardant to DIN4102, M2, ...