The retractable ladder setups are usually corrupted by either drivers that fail to fold them back thus insuring damage at some point or leave them down (for inexplicable reasons) and dock.
Furniture delivery vans (53', some 48') have these setups yet few of these setups are operational for very long especially with a lot of Drop-n-Hooks.
I've seen MANY trailers with the climbing handles crushed into the framework when the handles are even present at all.
A LOT of places (k-mart, wail-mart, sams, lowes, etc., D.Cs and stores) will slam these handles with Lifts while either loading (usually) or unloading.
For the drivers pulling basically the same trailers, these setups generally remain operational except of course for slip seat operations yet for some other inexplicable reasons are overlooked by the vehicle maintenance folk.
Even with these supposed Safety features, many drivers have as well sustained serious injuries (broken legs, arms, etc.) from falling.
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