The ceiling area of the silo is designed to resist against natural pressure factors such as snow, wind, or exerted forces by temperature cables and transportation equipment. The standard slope of the silo ceiling is 30 degrees. Screws of grades 8.8 and 10.9 are used to connect the roof sheets and an inspection valve is installed on it. Silo ceiling sheets are highly waterproof with a galvanized coating of minimum (275 gr/m2), special design, and high sheets strength.