Loft Staircase

There needs to be a way to get up to the loft. My earlier concept designs involved a complicated folding staircase incorporated into the Rolling Shelf Wall I recently built. I have ruled that out for various reasons. Today I'll start building the stairs in a fairly simple manner, though I might build one hinge into them. I hope to buy a heavy duty pipe to hook the stairs to so they can move side-to-side. If I can figure out where to put them, I might also eventually install wheels at the bottom so it can slide easily. I don't know if these should be called stairs or a ladder. Sorta halfway in-between.