[태그:] liberty

The iron framework supporting the copper skin was an early example of curtain wall building, a technique of construction copied in 1885 for the initially skyscraper, and still in use these days. By designing the thin copper skin to “float” more than framework, it permitted thermal expansion and contraction to take location without having inducing excessive stresses. The huge granite and concrete pedestal was a single of the heaviest pieces…Read More