The Lift-A-Loft Universal Boarding Device (UBD) is a specially designed unit that allows the boarding of able body passengers and passenger needing special assistance simultaneously when Jet Bridges are not available. The UBD is available in two standard heights of UBD-64 and UBD -94. The UBD-64 allows boarding on aircrafts with door sill heights ranging from 50 inches to 79 inches and the UBD-94 can service aircraft with door still heights ranging from 80 inches to 108 inches. We also offer the UBD in custom configuration to meet individual customer's requirements. UBD marketing picture.jpg