In my past life, we encountered this issue and purchased carts and two
wheel dollies with pneumatic wheels. The wheels are wider and generally
roll nicer than hard wheels, but, being air filled, will lose air on
occasion. You might be able to replace the wheels on your existing
carts.

Ladders are another matter. Our mezzanine system allowed access to all
boxes from each level of the system without needing a ladder.

If you just really need a step stool, you could try those two step
library stools that are round. You may need to remove the wheels.

If you get new carts with wheel locks, and all you need is a step stool
height, your shorter staff may be able to lock the wheels on a cart and
use it as a step stool, but I'm not sure that your safety people will
like that suggestion.

Patrick Cunningham, CRM

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