fasten stainless steel plates into cement floor

[allpurpose]

I am installing a stainless steel (SS) cable shelving system in a retail space.

I have multiple circular SS plates which i need to inset flush and fasten to an existing concrete floor. What is the best way to affix these plates in a secure way? The research i've done thus far suggested that when using masonary screws, a minimum distance of 5 times the diameter of the screw should be maintained between screws to conserve the integrity of the concrete floor, however the plate is only 2" in diameter.

thanks

[Lawrence]

There are powder actuated fastening tools which are designed for this purpose. It uses the equivalent of a .22 cartridge to shoot masonry nails.

[Flank]

[Goedjn]

Drill a 2" hole, fill it with epoxy, and set the screws in that?