Choosing pallet racking is really a math problem wrapped in an engineering decision. Get it right and every pallet costs less to store. Get it wrong and you pay twice — once for the wrong system, and again to replace it.
This guide walks through the four questions that decide 90% of warehouse racking choices.
## 1. How many SKUs do you actually store?
This is the single most important question.
Many SKUs, each with modest volume → you need **selectivity**, meaning access to any pallet without moving another. That points to **selective pallet racking**, the most common system in the world.
Few SKUs, high volume per SKU → density matters more than selectivity. You can use deeper, denser systems like **drive-in racking** or **shuttle racking**.
If you are unsure, a good starting assumption is selective racking — it is the most flexible, and flexibility usually pays off as inventory changes.
## 2. How tall is your building?
The height of your warehouse decides how much of your investment goes upward instead of outward.
- Up to about 8–10 m: standard selective or drive-in racking works well.
- 10 m and above: high-bay systems such as **VNA (very narrow aisle)** racking become attractive, because the aisle width you save can be turned into storage.
- Fully automated operations: **AS/RS** racking allows the tallest, densest, most precise storage — at a higher investment.
As a rule, the taller the building, the more the *cost per pallet position* falls if you choose the right system.
## 3. What throughput do you run?
Storage and retrieval speed determine whether density alone is enough.
- Low turnover → density-first systems (drive-in) are fine.
- High turnover with many SKUs → selective or shuttle racking keeps access fast.
- Very high, consistent throughput → automation (AS/RS or shuttle) starts to pay for itself, especially where labor is scarce.
Measure in pallet movements per hour, not "busy or not". That number separates a good choice from an expensive one.
## 4. What are your special conditions?
Two conditions change racking design more than most buyers expect:
**Cold storage.** Low temperatures and condensation change both materials and finishes. Racking for freezers needs low-temperature-rated steel and appropriate corrosion protection — not standard warehouse racking.
**Seismic zones.** In earthquake-prone regions, racking needs additional bracing, higher-grade connections, and engineering calculations to local codes such as ASCE 7, EN 1998 or GB 50011.
Ignoring either is one of the most expensive mistakes in warehouse planning.
## A quick comparison
| System | Selectivity | Density | Best for | Relative cost |
|---|---|---|---|---|
| Selective | 100% | Low | Many SKUs | Lowest |
| Drive-In | Low (LIFO) | Very high | Few bulk SKUs | Mid |
| Push-Back | Medium | High | Mixed loads, LIFO | Mid |
| Shuttle | High | High | High throughput + density | Higher |
| VNA | 100% | High | Tall buildings | Mid–high |
| AS/RS | High | Highest | Automation, tall buildings | Highest |
None of these is "best". The best system is the one matched to your SKUs, building height, throughput and climate.
## Getting the math right
Two warehouses with identical floor area can differ by 40–60% in storage capacity depending on rack type and layout. That difference is almost always more valuable than a discount on the unit price.
Before you buy, ask for three things from any supplier:
1. A layout drawing based on your real pallet dimensions
2. Load calculations per level (not a generic "capacity" number)
3. Standards compliance — FEM, EN, RMI or your local code
## FAQ
**How much does pallet racking cost?**
Cost is normally quoted per pallet position, and it varies widely with height, load and system type. Selective racking is the most economical per position; drive-in and shuttle reduce cost per position when you need high density. Ask for a layout-based quotation rather than a unit price.
**How long does production take?**
Typical production is 15–25 days for selective racks and 20–35 days for drive-in or shuttle systems, after drawing approval. Sea freight is additional.
**Can I mix systems in one warehouse?**
Yes — most well-designed warehouses mix systems. A common example is selective racking for the fast-moving SKUs and drive-in or shuttle for bulk storage.
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*Planning a warehouse? Send your dimensions (L × W × clear height) and pallet details to sales@njapexbeam.com and we'll suggest the most cost-effective system — free.*