When warehouse space starts to run out, the most cost-effective way to expand is often upward, not outward. Two popular options for increasing storage capacity are Raised Storage Areas and Structural Mezzanines — but while they look similar, they are built very differently and serve distinct purposes.
Here’s a breakdown of what sets them apart and which one might be right for your business.
What Is a Raised Storage Area?
A Raised Storage Area (RSA) is a floor built on top of pallet racking or shelving systems.
It uses the racking structure itself as the support for the floor, creating an additional level of usable space above your existing storage.
Key Features:
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Constructed using standard pallet racking frames and beams
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Can be customised with staircases, handrails, and pallet gates
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Ideal for light to medium loads such as cartons, parts storage, or packing areas
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Can often be dismantled and relocated if your layout changes
Advantages:
✅ Lower cost than a structural mezzanine
✅ Quicker to install
✅ Fully adjustable and modular
✅ Makes excellent use of existing racking systems
What Is a Structural Mezzanine?
A Structural Mezzanine (also known as a free-standing mezzanine floor) is a steel platform supported by its own columns, completely independent of pallet racking.
It’s a permanent structure, designed and engineered to handle heavier loads, machinery, or even office fit-outs above or below.
Key Features:
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Built using heavy-duty steel columns and beams
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Can support high point loads, equipment, or enclosed rooms
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Requires engineering certification and typically a building permit
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Can be integrated with lifts, conveyors, or safety gates
Advantages:
✅ Extremely strong and durable
✅ Ideal for heavy-duty applications
✅ Custom-engineered to suit exact warehouse requirements
✅ Long-term investment that can increase property value
Key Differences at a Glance
| Feature | Raised Storage Area | Structural Mezzanine |
|---|---|---|
| Support Structure | Built from pallet racking or shelving | Standalone steel structure |
| Load Capacity | Light–medium | Heavy–very heavy |
| Flexibility | Easy to relocate or reconfigure | Permanent, engineered installation |
| Cost | Lower initial cost | Higher investment |
| Approval | Usually doesn’t require council permits | May require engineering & council approval |
| Common Use | Carton storage, picking, small parts | Machinery, offices, bulk storage, assembly areas |
Which Option Should You Choose?
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Choose a Raised Storage Area if you need extra picking or storage space quickly and affordably, and your load requirements are moderate.
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Choose a Structural Mezzanine if you’re planning a long-term warehouse expansion that requires heavier load capacity or structural integration.
At Better Storage Systems, we design, supply, and install both types of storage solutions.
Our team can assess your space, load requirements, and workflow to recommend the most efficient and compliant option.
📞 Get a free design and quote today — and make the most of your available warehouse height.