Rack floor plus 4X8 platform

[Classtime]

I searched the site and googled a bunch but can't find an answer to this question.

In your gyms, are the platforms bolted into the floor? If not, are they attached to the rack floor?
I'm going to build them separate (for possible moving later) but flush. Standard Two 3/4" plywood layers plus 3/4 stall mat.

[Mark Rippetoe]

Most platforms are bolted to the floor, and the racks are not, but we have a few the other way too.