This Louisville 24 foot aluminum industrial extension ladder has a 300 lb load capacity, rated ANSI Type IA. It is equipped with the MAXLOCK rung lock, custom engineered from a patented, advanced molecular polymer, MAXLOCK is the strongest, toughest, lightest rung lock ever made. This ladder includes the patented QuickLatch RungLock system that provides a simple, intuitive method of securing the fly and base sections of the ladder when extended. It features rubber fly section shoes, D-shaped rungs fully serrated for a slip resistant surface, mar-resistant rail end caps, stacked aluminum I-beam rails, and swivel safety shoes to be used with the tread down or in a spike position. The Louisville AE2824 aluminum extension ladder meets or exceeds the safety standards set by ANSI, CSA, and OSHA.