One Stop Controls, 2710 Lehigh St, Whitehall, PA 18052, US

About Zellner Welding Zellner Welding's master craftsmen specialize in structural steel fabrication and installation, metal stairways, railings, gates, window boxes, and fire escapes. We have worked with homeowners, retailers, industrial and commercial property owners, schools, and churches. We have a full size fabrication shop and can also perform fabrication in the field. In addition to our full service welding, fabrication and installation services, we also have a crane rental service with CCO certified crane operators who can lift trusses, house beams, HVAC units, structural steel and more. We are members of the ABC Eastern Pennsylvania Chapter, Whitehall Area Chamber of Commerce, and Lehigh Valley Chamber of Commerce.