What size bolts are needed to floor mount the NetShelter 4-post rack?

Issue: 
A customer needs to know what size bolt will fit through the floor mounting holes in the rack. 

Product Line: 
NetShelter SX

Environment: 
AR203A, AR204A, all serial numbers. 

Cause: 
There is no documentation as to the size of the floor mount holes. 

Resolution: 

A 5/8" diameter bolt (19 mm) will fit through the floor mount holes of the NetShelter 4-post rack.