[Lowfer] Casters for equipment?

[KD7JYK DM09]

: "Our V-Groove wheels are high strength cast iron or forged steel machined
: with a groove for operation on an inverted angle iron track"

: You might want to estimate the strength of your floor under the
: circumstances....a track could distribute the load depending on how you
: build it...

Thanks for the info.  The floor is high PSI, I forget the rating now, it's
been 16 years, something around 10 - 12K and 8" thick.  The actual
item has a footprint of around 3'x5' and weighs around 350#.

The casters are overkill, but I'd rather have too large with a high rating
than too small and have issues in decades to come.  And best of all, they 
are readily available!

Thanks again!

Kurt