Used by industries large and small for decades, fixed safety-cagedladders provide convenient access with increased protection fromfalls. In the US, ladders over 20’ tall (standards vary worldwide)require a safety cage, which must be mounted 7 to 8’ above theground, and 42" above the edge of the structure.
Yesterday as I was driving around I noticed that billboards, including very tall ones, have standard ladders without cages. These were way over 20’ tall so I don’t know what determines the applications that need them and which don’t.
Always pays to stay on the good side of rigging crews and crane operators, especially during plant turnarounds, unless one likes schlepping heavy tool bags and parts up lots of stairs and ladders.
