What Year Did Welding Start

http://augustefpp947.angelfire.com/index.blog/1633795/10-things-your-competitors-can-teach-you-about-rebarwireausproductscomau-steel-prefabricated-sydney/

While the cost of many steel frame materials has become progressively competitive, the expenses of construction are another matter. It takes a lot of time to build a steel frame building as it takes longer to use