The dropdown stairs give you access to the attic without taking up valuable floor space. Can be installed relatively easily and require little maintenance, since it is made of ladder few parts. The attic pull down stairs themselves are made of long side elements called stringers, then wood or metal ladder or steps, as they are sometimes called. Most rods drop down stairs has steps that provide extra support. Also rungs of the ladder, tables that support the end of the steps.
Almost all steps are added drop down to a door panel by supports and springs. The panel fits tightly into an opening in the roof is framed with headers, but are the spring mechanism responsible for the drop down the stairs. As the name says, jump against narrow coils, holding the ladder against the headboard. Several mechanisms of springs in attic pull down stairs, including springs, springs and unit supporting springs.
The brackets provide support for the ladder, to hold stably. Typically there will be several supports, at the top of the attic pull down stairs, where are hinges and sides to provide support while ups and downs. The angle brackets added the stairs to the door panel that hides once it is folded on the roof.