Portland, Oregon has the second largest collection of cast-iron structured buildings in the US, next only to NY City. Cast-iron buildings were built from the late 1850s to 1900 as a inexpensive, fireproof alternative to the flammable wood and limited brick buildings of the time. By having a cast-iron , load bearing infastructure wrapped with easily stylized masonry front- mostly limestone or terra-cotta, the commercial buildings of the late 1800s were built with an artistic style featuring old classic styles as well as the soon to be adopted modern style, using the newly designed Otis elevator to enable builders to have larger , more creative safe structures.
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