h
Chat with our AI personalities
Man power powered factories then coal powered them
If you meant The Gateway Arch in St. Louis, Missouri, then the first 300 feet of each wall consists of a stainless steel skin covering a sandwich of two carbon steel walls with reinforced concrete in the middle, and carbon steel and re-bar starting at 300 feet, going up to the peak.
Commander Steel was created in 1978.
increase steel production
steel was invented by the Chinese before 200 B.C.E.