... by standard bolts.4. Easy to understand . The bolted silo is equipped with relevant accessories, such as: conveyor, ventilation, ... work. 2. RoofRoof is made up of radiated beam, roof cover board, tension ring, ventilator scoop, roof cap, etc. The ... to your requirement.5. Ventilation SystemVentilation for Flat bottom silo Ventilation System includes Natural ventilation vents,Suction Fan,Ventilation ...