The title says pretty much it. But here a little more context:
There’s a EXIT sign I want to improve. I should look something like this:
Fixed stairs <= EXIT => Mechanical Stairs
1) How can I represent graphically and unequivocally the two type of stairs?
2) Should I place just graphics, just text, or both to indicate them?
A good icon for stairs with cogs or arrows pointing forward will be decriptive enough.
I found the example below using google images.