RMS offers a full range of corrugated, galvanized rainwater storage tanks. These tanks are constructed of Scafco corrugated, galvanized, punched and rolled steel wall sheets that are bolted together at a project site. Most tanks are round structures and range from 6' to 105' diameter. Corrugated rainwater storage tanks generally are fitted with preliners and flexible membrane liners on the inside of the tanks for water containment. The tanks do not have a bottom structure that requires them to be erected on site on a concrete slab. The use of a flexible membrane liner also distributes the water load uniformly across the foundation area. Storage capacity ranges from 600 gallons to 440,000 gallons.