To avoid lugging in a ladder all the time, I am planning to build storage under subfloor. The ladder will be accessible by having a lid in the floor.
However, once the lid is opened, the ladder should be able to rest between floor joists - once the space between the floor joist has been reinforced to support upto 300 lb.
For clarity - see attached diagram.
Does anybody have experience in such a project. The image shows what I am planning.