Multi-Spot Stiffener Welder featuring twenty (20) guns and up to five (5) welding transformers rated 120 KVA. Designed for welding hat section stiffeners onto doors up to 8 ft. long. Includes locators for the hat sections and front roller tables with dog gauges-flip stops for manual indexing. Microprocessor control with cascade firing to minimize demand on plant electrical mains. 3- phase load distribution also available.