The A series aluminum attic ladders have a duty rating of 300 pounds yet are lightweight and easy to open, close and install. The aluminum side rails are attractive and will not splinter, decay or rust. The grooved steps are slip resistant, and heavy duty hinges ensure a rigid structure. Adjustable feet make installation easy and ensure a correct fit. The high quality door can be painted or stained. The unique design adds toe clearance for comfortable climbing. The counter-balance mechanisms eliminate sag and springiness.