Pinwheeling
Also called: pinwheel pattern, pinwheel stacking, pinwheel loading
Pinwheeling has two meanings. In palletizing it is a pattern where cases are arranged in rotated groups around the center of each layer, often leaving a small void. In trailer loading it means turning some pallets 90 degrees so more fit on the floor.
In depth: How many pallets fit in a truck? 53 ft and 48 ft trailer counts
Pinwheel stacking pattern
In a pinwheel layer, groups of cases are rotated around the center, like the blades of a pinwheel. When the case length and width do not divide evenly into the pallet, the pattern often leaves a small open square in the middle. Alternate layers are usually mirrored or rotated so the load interlocks.
| Factor | Pinwheel pattern |
|---|---|
| Fit | Uses cases whose length and width do not fit a simple row pattern |
| Stability | Good, because layers interlock |
| Compression strength | Lower than column stacking |
| Center void | Common; the deck under it carries no load |
Pinwheel loading in a trailer
In truck loading, pinwheeling (or turning) pallets means placing some pallets with the long side across the trailer and some with the long side along it, so the footprints fill the floor better. For 48 × 40 in pallets in a 53 ft trailer, all straight gives 26 floor positions and all turned gives 30. Mixed patterns fit sizes that do not suit either. The pallets per truck calculator shows the options.
Why it matters
For the stacking pattern, the pinwheel's center void and rotated cases change where load bears on the deck. For trailer loading, pallets turned 90 degrees must be forked from their other side, so four-way entry helps.
On a spec sheet or RFQ
Say which meaning you intend. For a unit load, attach the pattern drawing. For a load plan, give the trailer and the number of pallets straight and turned.
Common confusions
A pinwheel void in a unit load is not wasted if the case sizes are fixed. It may be the best available fit.
Related
- GlossaryStacking patternA stacking pattern is the arrangement of cases on a pallet: how they are placed within each layer and how each layer relates to the one below. The main choices are column stacking, which maximizes box strength, and interlocking patterns, which improve stability.
- GlossaryInterlocking stackingInterlocking stacking is a stacking pattern where alternate layers are rotated or shifted so each case bridges the joints between cases in the layer below, like bricks in a wall. It ties the load together but reduces compression strength compared with column stacking.
- GlossaryPallet positionA pallet position is the space for one pallet: a floor spot in a trailer or container, or a slot in a warehouse rack. Carriers and third-party logistics providers (3PLs) often count capacity and charge storage by pallet position.
- GuidesHow many pallets fit in a truck? 53 ft and 48 ft trailer countsA 53 ft dry van holds 26 standard 48 × 40 in pallets loaded straight (two across, 13 rows) or 30 loaded turned (15 rows), single stacked. Double stacking doubles that if the loads allow. A 48 ft trailer holds 22 to 24 straight or 28 turned. Weight often runs out first, at about 42,000 to 45,000 lb of cargo.
- CalculatorsPallets per truck and containerHow many pallets fit in a 53 ft or 48 ft trailer, a box truck, or a 20 ft, 40 ft or 45 ft container, straight, turned or mixed, with a top-view load plan.
More in Loading and shipping
- GlossaryColumn stackingColumn stacking is a stacking pattern where every case sits directly on top of the case below, with corners and walls aligned through the full height of the load. It keeps the most compression strength but is less stable than interlocking.
- GlossaryCube utilizationCube utilization is the share of the available volume, in a pallet footprint up to its height limit, a trailer or a container, that is actually filled with product. It is usually expressed as a percentage.
- GlossaryFloor loadingFloor loading is shipping cases or bags stacked directly on the floor of a trailer or container, without pallets. It fits more product in the vehicle but must be loaded and unloaded by hand or with special equipment. The term is also used for the load a floor can bear per unit area.
- GlossaryFreight densityFreight density is the weight of a shipment divided by the volume it occupies, measured at its outside dimensions with the pallet included. In the US it is given in pounds per cubic foot (pcf) and is the main factor in most LTL freight classes.
- GlossaryFTL (full truckload)FTL (full truckload) is a shipment that uses a dedicated trailer from origin to destination, with no terminal handling. A 53 ft dry van takes 26 standard 48 × 40 in pallets loaded straight or 30 turned, single stacked, subject to the legal weight limit.
- GlossaryLoad barA load bar is an adjustable steel or aluminum bar fixed across the inside of a trailer or container, either wedged between the walls or locked into wall track, to keep pallets from sliding during transit. Horizontal decking beams also let a second tier of pallets be carried.
Last reviewed 2026-09-24. 290 words.