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ALL ALUMINUM f Marine Ladders TYPE MH — Single rung - with or without hand rails. TYPE MHDR - Double rung - with or without hand rails. TYPE MHSR - Single rung plus step on top of rung with or without hand rails. TYPE MHDRGS - Super duty with double rungs and grip strut tread covering rungs. Sure footing in ice and snow. All models are 6061-T6 aluminum with a minimum yield of 38,000 p.s.i. All rungs are electrically welded to outer truss plates and internally expanded to inner truss plates. All models are on 12" centers (per OSHA) and feature all aluminum or plated steel fittings. DUO-SAFETY LADDER CORPORATION 513 West Ninth Avenue, Oshkosh, Wisconsin 54901 Area Code 414/231-2740 April 1, 1976 5
