| Deciding factor | Mezzanine floor | Wider ground rack |
|---|---|---|
| Storage dimension | uses vertical height | wider footprint |
| Goods | light / medium | heavy pallet, forklift |
| Access | lift, conveyor or crane | forklift aisle |
| Cost driver | lift route + deck | more floor and rack |
| Best fit | tall roof, crowded floor | room to spread, heavy lot |
What belongs on the upper deck of a mezzanine?
Light and medium goods that do not need repeated forklift turns ride up cheaply on the lift; heavy or fast-rotating pallets stay on the ground. Store the unit that pays for the height it occupies and the deck is a free floor, park a pallet that does not and it taxes every pick.
Decision rule
A shelf area added vertically and one added horizontally are both shelf area, but they cost through different doors: mezzanine treats the empty ceiling as the free real estate and pays for a lift route and a deck, while a wider ground rack pays for floor and beam rating. The mezzanine earns its density only to the degree the added level’s route is cheap and the goods are light enough to ride a lift; heavy pallets stay on the ground, which is precisely when a mezzanine is a wasted floor and the same money belongs in more beam racking.
All figures on this page are illustrative sample values, not measured specifications.