Pallet Loading Patterns — Pinwheel, Block, Row, Column Explained

The pattern in which you arrange pallets inside a shipping container determines how many you can fit. Using the wrong pattern can cost you 1–3 pallets per container — that is wasted space you are already paying for.

The 5 Main Pallet Loading Patterns

1. Pinwheel (Mixed-Orientation) Loading — Recommended

The industry standard for maximising pallet count. The container is split into two zones, with pallets rotated 90° in each zone. This is how 10 standard pallets fit in a 20ft container instead of just 8.

✅ Best for: 20ft containers with standard pallets
✅ Fits: 10 pallets (vs 8 with block loading)
⚠ Requires: Careful planning and forklift access from both sides

2. Block Loading (Straight / Grid)

All pallets placed in the same orientation, forming a neat grid. Easiest to plan and execute. Used in 40ft containers where the floor dimensions align perfectly with 10×2 rows.

✅ Best for: 40ft containers (gives maximum 20 pallets)
✅ Simplest loading method
❌ Suboptimal for 20ft (only 8 pallets vs 10 with pinwheel)

3. Row Pattern

Pallets arranged in a single row along the container length. Used for oversized pallets or when forklift access is only from one end.

4. Column Pattern

Pallets arranged in columns across the container width. Useful when loading from the side (side-door containers) or for very wide pallets.

5. Brick / Offset Pattern

Alternating pallet orientations row by row, similar to a brick wall pattern. Provides better load stability than block loading. Slightly reduces pallet count vs pinwheel in most containers.

Which Pattern Fits the Most Pallets?

Pattern	20ft (120×100cm)	40ft (120×100cm)	Difficulty
Pinwheel	10 pallets	20 pallets	Medium
Block	8 pallets	20 pallets	Easy
Brick/Offset	8–9 pallets	19–20 pallets	Medium
Row	4–5 pallets	9–10 pallets	Easy

How Pinwheel Loading Works — Step by Step

Divide the 20ft container floor into two depth zones. Zone A = 120cm from the front wall. Zone B = remaining 113cm towards the doors.
Load Zone A: Place 5 pallets with the 100cm side along the container length (5 × 100cm = 500cm across the 589cm floor).
Load Zone B: Rotate pallets 90°. Place 4 pallets at 120cm wide + 1 pallet at 100cm wide to fill the remaining length.
Result: 5 + 5 = 10 pallets in a 20ft container.

Pro tip: Mark Zone A and Zone B on the warehouse floor before loading begins. Tell forklift operators which zone each pallet goes into and which direction to face them. This eliminates confusion and speeds up loading.

Pallet Stacking Patterns (Cartons on the Pallet)

Separate from container layout, the pattern of cartons on each pallet also matters for stability:

Stack Pattern	Description	Stability	Cartons/Pallet
Column (block)	All cartons aligned same direction	Medium	Maximum
Brick	Alternating 90° each layer	High	Same as column
Pinwheel	4 cartons rotated around a centre	Very high	Slightly less
Split row	Mixed orientations in a row	High	Same

Optimise Your Pallet Loading Automatically

ContainerLoad calculates the best loading pattern for your carton dimensions

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FAQ

What is the most efficient pallet loading pattern for a 20ft container?

Pinwheel (mixed-orientation) loading is the most efficient for 20ft containers with standard 120×100cm pallets, fitting 10 pallets vs 8 with block loading — a 25% improvement with no extra cost.

Does pallet orientation affect cargo stability?

Yes. Pinwheel orientation in a 20ft container slightly reduces stability compared to block loading because pallets face different directions. Ensure pallets are well stretch-wrapped and use dunnage bags in any gaps.

Can you mix pallet sizes in one container?

Yes, and sometimes this is how you get an extra pallet in. ContainerLoad calculates mixed pallet configurations automatically.