Alta-One With the light-weight, versatile Little Giant Alta-One™ articulating ladder, you can count on quality performance for years to come. The hinge locks and telescoping sides let you safely use the Alta-One as an adjustable extension ladder, A-frame ladder, staircase ladder, and as trestle-and-plank scaffolding system. Wide-flared legs, rubberized feet, and high-quality construction give you unmatched stability in any of its dozens unique configurations. Because it is constructed of aerospace-grade aluminum, the Alta-One is ultra-light and ultra-strong. The Alta-One is rated to hold up to 250 lbs. on both sides, so it’s perfect for medium-sized jobs. The Alta-One Ladder is available in 13, 17, and 22-foot sizes.