Here are a few tips if you're thinking of building your own steel or wood attic pull down ladders. The basic concept behind attic pull down ladders, is, course, getting into and out of the attic. You are creating folding stairs, basically. When you need access to the attic you pull down your ladder. When you're out of the attic and don't need to go back, you fold your ladder back up.
You can purchase a whole kit to build an attic pull down ladder, choosing from either a steel ladder or a wood one. These kits can be found at a major outlet building supply store. The kits allow for quick and easy installation of the folding attic ladder. The two things you need to first determine before you make the ladder kit purchase is that you have enough room to swing your ladder open and that you also have adequate floor space around the area where the bottom of the attic pull down ladder would sit that you would be safe accessing and exiting the attic via your pull down ladder.
Check your home dimensions and the dimensions of the pull down attic ladder kits you're considering before you buy one. Check out community building codes as well. Once you're done constructing your attic ladder you can neatly trim the opening.
Keep in mind that this is not an easy construction, and that you will need several hours free to complete the installation as well as one other person to help you build your attic pull down ladder.