- Engineering note
Aisle Width and Clear Height: What Draws Your Layout
Two numbers — the aisle your truck needs and the height your building allows — decide most of a warehouse racking layout before any rack is chosen.
- Truck type and turn radius
- sets aisle width, and that sets how much floor is aisles
- Stock rotation speed
- sets how many picks per hour the aisles must serve
- SKU count versus units per SKU
- sets storage style — selective, drive-in, shelving
- Engineering note
Pallet Racking or Shelving? Load Per Unit Decides
The aisle-economics difference between pallet racking and shelving — what each system does with a SKU, a person and an hour, and the questions that pick one.
- Is the order most of a pallet, or a few cartons?
- the first and usually final question
- How many SKUs does one aisle serve?
- shelving multiplies faces; racking multiplies volume
- What does one picker touch per hour?
- a person's hands set shelving maths; a truck sets racking maths
- Engineering note
Reading Rack Load Ratings Without Fooling Yourself
A shelf rated 200 kg is not a shelf that holds 200 kg anywhere, in any shape, on any floor. What load plates actually measure and what they silently assume.
- The load is UDL
- point or edge loads can be twice as punishing
- The bay rating assumes all shelves loaded
- one empty shelf does not donate its capacity to its neighbour
- The floor is assumed flat and strong
- thin slabs crack under uprights at full load
- Engineering note
Buying Used Racking: The Walk-Through Checklist
What to inspect on used pallet racking before booking the truck: damage that ends a deal, issues that are only paperwork, and what to demand in writing.
- Upright columns, both faces
- any crease or bend in the loaded zone — walk past the whole set if found
- Beam ends and connectors
- deformed hooks or safety-tab slots mean a overload history; tabs missing is cheap but telling
- Column hole wear
- egged-out beam slots say the rack lived with misjudged beam heights
- Engineering note
Spending Vertical Space Without Borrowing Trouble
The cube above your top shelf is inventory you already own. Taller frames, a mezzanine or denser storage — and which clearances are not yours to trade.
- Taller frames, same footprint
- cheapest per pallet; needs slab check, aisle equipment reach, sprinkler review
- Mezzanine floor
- adds floor area, not just height; structure, stairs, fire route — a building permit conversation
- Denser storage (drive-in, pallet shuttle)
- height plus depth, but trades away selectivity; needs SKU fit analysis first