This Featherlite 36 foot aluminum industrial extension ladder has a 300 lb load capacity, rated CSA GRADE IA. This ladder also features outside slide guides, D-shaped rungs fully serrated for a slip resistant surface, mar-resistant rail end caps, rope and pulley,and swivel safety shoes. The Featherlite 4236D aluminum extension ladder meets or exceeds the safety standards set by CSA, CSA, and OSHA.