Louisville Ladder AH1012 300-Pound Duty Rating Aluminum Shelf Ladder, 12-Foot 300-Pound, load capacity, includes weight of user and tools Two pair of steel gussets under bottom step for extra support, all gussets are heavy duty steel Rubber bumper, ladder has parallel sides with thick rubber bumpers extending 6-Inch down the side rails Each step secured with six large headed, semi tubular steel rivets for maximum strength The ladder meets or exceeds the safety standards set by ANSI and OSHA