Support Bar : Member of the screening surface support frame that forms the crown of the deck. Also knows as bar rail, bridge rail, bucker-up bar, or longitudinal bar. (Bul 13C)
The Mudblogger (Oilfield, Energy and Related Photographs), Oil Field Glossary, TX, USA 2014. http://mudblogger.com/oilfield-glossary/, (Oil - Amer) {777}