Tri-Arc KDHS109246 9-Step Heavy-Duty Safety Angle Steel Rolling Industrial & Warehouse Ladder with Perforated Tread 1-1/16-inch tubular steel construction with powder coat gray finish 24-inch wide step & 17-inch deep top platform 90-inch platform height; 126-inch overall height Step-Lock positive locking system engages when the user steps on the first step; 600-pound capacity Safety angle allows for face forward descent; Perforated slip-resistant tread design