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The load‑bearing capacity of the floor mainly depends on two indicators:

Concentrated load: the limit value when single‑point pressure is applied to the center of the floor.

Uniformly distributed load: the load‑bearing capacity of the whole floor under even force, such as dense personnel standing or large‑area equipment stacking.

How to make a proper selection? Here is a simple method: take the weight of the heaviest equipment in the computer room as the reference. A fully‑loaded ordinary server cabinet weighs about 300‑500 kg, usually supported by four load‑bearing feet at the bottom. The recommended concentrated load of the corresponding floor shall be no less than 4450 N (about 454 kg). A single large‑size core switch or storage device can reach 600‑800 kg, so Z‑grade floor (concentrated load ≥ 5560 N, about 567 kg) is the minimum requirement. For UPS battery packs or power distribution cabinets whose weight may exceed 1 ton, CZ‑grade floor (concentrated load ≥ 8000 N, about 816 kg) must be adopted.

Practical suggestion: List the model and weight of your heaviest equipment before selection, and inform the supplier to recommend matched products according to national standard grades. Do not make arbitrary assumptions or blindly pursue "the higher‑the‑better". The most cost‑effective solution is to meet actual requirements with proper safety margin.