Straight Ladder Ladder Height 18 ft Overall Width 18 1/8 in Material Aluminum Load Capacity 300 lb Number of Rungs 18 Top to Bottom Rung 17 ft Rung Dia 1 3/4 in Rung/Step Spacing 12 in Rung Width 18 in Top Step Height 14 ft Rung Shape D-Rung Standards ANSI A14.5 (2007) OSHA ANSI Type IA Net Weight 38.5 lb