GILLIS Permanent Dock Ladders mount to docks, platforms, etc. 18"W, 3/4" solid round, slip-resistant rungs offer excellent slip protection in oily or wet environments. Ladder is 27"W at walk-through. 1" dia. pipe frame. 7-1/2" overall from wall, 6-1/2" inside clearance. 300-lb. capacity. Meet OSHA specifications. Enamel finish. NOTE: Height is the distance between top of dock and bottom rung.