ANSI/TIA-942 specifies minimum floor live load capacities based on Rated levels:
* Rated-1/2: ~7.2-8.4 kPa
* Rated-3: 12 kPa
* Rated-4: 15 kPa
These values ensure raised floors can support racks, cabling trays, cooling units, and maintenance loads without structural compromise. For Rated-3, concurrent maintainability requires higher floor robustness to handle additional infrastructure.
Therefore, the correct requirement is 12 kPa.
References: ANSI/TIA-942-B §6.3.5 (Floor Loading), CISCA Raised Floor Design Guide.