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(Ron Bean)
Did they have specific issues with your design, or just with your
credentials?

They never looked at the design. Only the concept of a non-elevator
company installing what they considered to be an elevator.

How often would this get used? What if the operator goes up the
stairs and then brings the stuff up on a hoist after he's up
there? Or use a forklift, if one is available.

The duty cycle is probably 10 cycles/day A forklift would not work
because it takes up a lot of room, and the actual live load is only 10
to 30 lbs. I have a forklift here, but it is a 5000 lb machine that
is old, big, and way over kill.

The materials in the dumbwaiter car are laboratory glassware and
chemicals