ARFAS (Aluminum Rail Fall Arrest System). Commercial aircraft “Tall Bay” maintenance hangar. Multiple “Pull-In Line” bays have coverage with 2 man ARFAS rails installed at each individual “Pull-In Line”. Custom inverted “H” I-beam mounting brackets. Skyloc II Aviation Series SRL’s installed on ARFAS trolley’s to limit fall clearances to 4’, including 2’ maximum extension, 1’ harness stretch and 1’ safety factor.