Its reinforced centre poles are 2" diameter, 1.5mm thick galvanized steel pipes for a solid base. While top rails prevent canopy collapse, 1.5" diameter, 1.2mm thick galvanized steel sidewall poles provide extra support. The 20x30 canopy frame is made of durable 480GSM flame-retardant PVC fabric for all-weather safety and comfort. Waterproof and UV-resistant, this material protects guests and equipment from unexpected rain and sun rays. This heavy-duty party tent 20 x 30 can seat 120 guests at 30' L x 20' W x 13' H. Its large interior may accommodate dining tables, dance floors, and presentation sections for a formal wedding, exciting party, corporate event, or community meeting.