After all the usage for remodelling the attic, the wooden pull-down stairs that the builder installed was really showing the wear and tear. So I replaced them with a new set of pull-down stairs. Lowe's had a metal unit ($132.12), which seemed like it would last much longer.
We removed the old wooden unit, and installed the new metal stairs. Notice that the legs are separately adjustable, so I have a short one and a longer one to match the garage floor.