Once man started building up instead of out, stronger building materials became necessary to support taller structures. And tall buildings place a lot of weight on load-bearing walls; some sort of support framework was needed to carry the load. We can see here that steel has a dual role in our ...
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Other articles where Stone is discussed: art conservation and restoration: Stone sculpture: With examples dating back to the enormous prehistoric statues of Easter Island, many types of stone have been employed over the centuries in sculpture.
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