Ships ladders are steep stairs with standard slopes of 60 & 75 degrees. They have a variety of uses, including but not limited to: Roof Hatches, Mezzanines, and access over roof walls, piping, etc…
Ships ladders make it easy to get from one side to the other side of a roof wall, over piping, etc…
Ships ladders make it easy to get to an upper level of a building such as a mezzanine.
Ships ladders is a convenient way to get up to a roof hatch – although roof hatch not shown here.