How large are the packaged units are you talking about?
Some appliance dollies/trucks can hold up to 700 lbs, is that big enough?
I have one of the types that you can convert from vertical to horizontal with nice pneumatic tires.
It rolls over stone driveways and grass easily and also goes up and down stairs pretty nicely. There is no onboard strap, so I just use a couple of ratcheting nylon web straps to secure the load to it
I think it is the Milwaukee brand the sell at HD or something very similar. Not sure, but I think it is rated for like 500 lbs max.
In Middle Tennesee we had one small manufacturer who ultimately closed up shop but he had made a two wheel, width adjustable to wide enough for the new 5 tons. We had purchased a couple over the life of the company (sometimes they mysteriously dissappear) but I had some plans duplicated by our largest steel fabricator and had some made pretty inexpensive too. Could probably post the plans if you like.
That is a great dolly for small appliances but what the original post was about was moving large package unit across a customers yard or a rooftop. Depending on what part of the country you are in and whether or not you do commercial work you may not be familiar with packaged equipment.
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