I saw enough posts of the attic ladders that others are getting (Stuart) and went looking for one that would work in my tiny attic opening. I found this ladder from Werner that looks like it might work. A poster DrDad has a good writeup in the Home Depot comments and mentions that the framing at the top may need to be made more robust for the install. That may be something that I ask the workers to strengthen while they are working on it.
On a progress note, it looks like I may get the slab poured tomorrow based on the building permit.