On 6/16/2010 3:03 PM, VM wrote:
There is a standard for steel shelving size and construction, with
heavy steel angle uprights with 1/4" holes at about 1" intevals.
'Standard' at least in that I've seen a ton of it in warehouses, etc.
and it's carried by a lot of hardware stores. I'm sure most know from
that brief description.

Oddly enough, I have not been able to find anyone who makes wheels for
it. Even some of the warehousing operations could use that. It would
entail only a regular caster-type wheel with a fitting to accommodate
the steel angle. My guess is that the product does exist somewhere.
Anyone know?

Check out scaffolding. I use a painters scaffold in my shop as a
mobile shelf. You're hinting a big shelving so you might want to give
this a good think. A six foot high shelf on wheels is one thing. A
twenty footer falling over on someone's head is another story.

LdB