Thanks guys,
That lead to some interesting reading.
Duo-Safety (and others) make a "folding attic ladder" of a design that I saw about 20 years ago in a then very old wood ladder and thought was really cool, neat to see they still make a similar modern version. Collapsed it's more like a pole than a ladder.
Also looked up the aluminum equivalent to what I have, and it'd cost $677. More than twice what I would have guessed, even for a fire ladder instead of a construction type.
Here's a link for new wood ladders
http://www.alacoladder.com/fire-ladders.phpStory about San Francisco ladders
http://www.sfgate.com/bayarea/artic...ion-also-saves-2584568.php#photo-2694705Learn something new everyday,
Grigg