The Louisville 12 ft manhole ladder has a 375 lb load capacity, ANSI type IAA rated. It features double side 3 ft plastic rail protectors to avoid manhole rim damage, heavy duty gussets under steps and new heavy duty 180 deg boots that allow you to work on either side of the ladder with thick non-marring thermoplastic elastomer tread bonded and mechanically fastened to the upper boot. The polypropylene copolymer upper boot provides strength, durability and fiberglass protection.