Fixed Aluminum Access Ladder Only Clearance: 17 1⁄4” Outside Rails: 20″ Rung Diameter: 1 1⁄4” O.D. Rung Center to Wall: 7″ These fixed aluminum access ladders are designed for interior applications to provide access to overhead roof hatches. * For fire escape brackets, search model # FEBA   MODEL SIZE (i) WT. FA08 8′ 61 lbs. FA10 10′ 66 lbs. FA12 12′ 71 lbs. FA14 14′ 77 lbs. FA16 16′ 82 lbs. FA18 18′ 87 lbs. FA20 20′ 93 lbs. FA22 22′ 98 lbs. FA24 24′ 103 lbs.