Complex sentence: The success of the Phoenix column led to the formation of a construction subsidiary named Clarke, Reeves & Co. Later renamed the Phoenixville Bridge Works and finally the Phoenix Bridge Company, the firm ultimately built some 4,200 bridges, primarily wrought iron truss railway bridges.
Split into simpler sentences: The success of the Phoenix column led to the formation of a construction subsidiary. The firm ultimately built some 4,200 bridges, primarily wrought iron truss railway bridges.