The technology for the manufacturing of glass continued to evolve over the centuries. Over this time the crown glass technique became more prolific. As the industrial revolution matured into the Victorian age methods for producing window, glass continued to develop with glass sheets cut from large blown cylinders becoming the new mass production technique.Mass production techniques in the 1800s used timber for window frames with some use of wrought iron frames for industrial and transport buildings. In the US, larger buildings were being developed where structural steel frames carried the building’s weight in place of masonry walls.