Pallet Rack Supported Mezzanines: Two Types


Running out of warehouse space doesn’t always mean you need a bigger building. Sometimes, the best solution is to make better use of the space you already have. Pallet rack supported mezzanines are a highly efficient and cost-effective way to store products and maximize your available warehouse space. By using the vertical space within your facility, you can add storage levels without expanding your building footprint.
There are two main types of pallet rack supported mezzanines:
- Two-level pallet rack systems (with catwalks)
- Pallet rack supported mezzanines with an open solid deck.
Both use standard pallet rack components, but each offers a different way to organize products and take advantage of your available warehouse space. The two-level catwalk system is generally the more economical option, providing storage on both levels with an elevated walkway for access. The solid deck design creates a continuous upper floor that’s ideal for shelving, small parts storage and order picking. Pallet rack supported mezzanines are also sometimes called multi-tier or multi-level pallet racking systems. They can be designed for applications ranging from small storage areas to extremely large warehouse operations, making them a versatile solution for businesses looking to increase storage capacity.
Two-Level Pallet Rack Supported Mezzanines
A two-level pallet rack supported mezzanine combines pallet storage on both levels with an elevated catwalk that allows employees to access upper-level inventory. This configuration is generally the more economical of the two designs because it doesn’t require a continuous upper deck. Instead, the elevated walkway provides access to the upper storage level while the rack structure supports inventory below and above.
One of the biggest advantages is the versatility of the design. These systems can be configured for a small warehouse application or scaled up to accommodate an extensive storage operation. Because they use standard pallet rack components, the layout can be customized to fit your available space, storage requirements and workflow.
How the Catwalk Is Constructed
The catwalk uses specially designed support beams that connect the pallet rack beams on opposite sides of the walkway. These support beams are generally 3 to 5 feet long, depending on the design. Bar grating is installed on top of the catwalk supports to create the walking surface. This produces an elevated walkway that provides access to upper-level inventory without requiring a continuous deck across the entire storage area.
The open design also offers practical advantages when incorporating building utilities. Fire sprinkler piping, electrical conduits and other services can often be installed beneath the catwalk, subject to applicable codes and the requirements of the specific systems. If you’ve ever visited an automotive parts store, you’ve probably seen a two-story shelving system with an elevated walkway and storage on both levels. A pallet rack supported catwalk system works on a similar principle, using pallet rack components to create a flexible warehouse storage solution.
Accessing the Upper Level
There are several ways to access the upper level of a pallet rack supported mezzanine. A permanent stairway can be installed inside or outside the rack layout, depending on the available space and the warehouse’s operating requirements. For applications where a permanent stairway isn’t necessary, a steel rolling ladder can provide a more economical way to access upper-level inventory. The appropriate ladder should be selected for the intended use and operating conditions.
A landing area can also be incorporated into the design, along with a loading gate for transferring materials between levels. For warehouses that regularly move products between the ground floor and upper storage areas, a vertical reciprocating conveyor (VRC) is another option worth considering. A VRC moves materials vertically between designated levels and can improve material flow throughout the facility. Learn more about our vertical reciprocating conveyors to see how they can complement your warehouse storage system.
Pallet Rack Supported Mezzanines with a Solid Deck
A pallet rack supported mezzanine with a solid deck creates a continuous elevated floor for additional storage, shelving and order picking. This design is similar in concept to a conventional steel mezzanine, but it uses standard pallet rack components to support the structure. It is particularly useful when you need an uninterrupted upper-level surface rather than an open catwalk.
In a typical installation, pallet rack beams are positioned at the top of the uprights, often on uprights approximately 9 or 10 feet high, depending on the application. Support channels and corrugated metal provide the necessary support beneath the finished deck surface.
How the Solid Deck Is Constructed
Standard pallet rack beams have a 1 5/8-inch step that helps accommodate this construction method. Along the outside edges, the corrugated metal can sit within the step of the beams. Along interior beams, the corrugated metal rests on top of the beam steps. The metal is then secured to the beams with self-tapping screws.
The finished deck surface is installed over the supporting assembly, creating an elevated floor similar in concept to the decking used on a conventional mezzanine. The specific decking materials, support arrangement and fastening methods should follow the engineered design for the intended application.
Adding Shelving to the Upper Level
Many businesses use a solid deck mezzanine to create additional space for small parts, cartons, supplies and other products that employees pick by hand. We recommend considering wide-span shelving for these applications. It provides a lightweight and versatile storage solution with substantial load capacity when properly selected and configured for the intended use.
For example, a warehouse might use the lower level for palletized inventory and the upper level for shelving and smaller products. This creates two useful storage areas within the same building footprint. The result is more storage capacity without the expense and disruption of expanding your existing facility.
Benefits of Pallet Rack Supported Mezzanines
Cost is an important advantage of pallet rack supported mezzanines, but it isn’t the only one. Ease of installation, design flexibility and the ability to relocate the system can make these structures a practical long-term investment.
Economical Construction
Because these systems use standard pallet rack components, they can provide an economical alternative to a conventional structural mezzanine. The two-level catwalk configuration is generally the more economical of the two designs because it doesn’t require a continuous upper deck. The best solution depends on your storage requirements, the loads involved and how you intend to use the elevated space.
Ease of Installation
Pallet rack supported mezzanines use established rack components to create the elevated structure. This can simplify installation compared with some conventional mezzanine designs. The installation process still requires proper planning, engineered specifications and qualified installation to ensure the system meets the requirements of the application.
Design Flexibility
No two warehouses operate exactly alike. Pallet rack supported mezzanines can be configured for different building layouts, ceiling heights, storage requirements and material handling needs. Whether you need a compact catwalk system or a large multi-level storage installation, the design can be tailored to your operation. You can also incorporate stairways, loading gates, conveyors, shelving and other accessories to make the system more useful for your employees.
Disassembly and Relocation
Another significant advantage is that these systems can often be disassembled and reassembled in another location. If your business moves, expands or reorganizes its warehouse, compatible pallet rack components may be reused in a new configuration. This can help preserve the value of your investment rather than requiring an entirely new storage structure. Components must be inspected for damage, compatibility and suitability for the new design before reuse.
What Industries Use Pallet Rack Supported Mezzanines?
Pallet rack supported mezzanines work well in many industries that need to increase storage capacity without expanding their buildings.
Common applications include:
- Automotive parts distributors: Store smaller parts, components and supplies on elevated shelving while maintaining bulk storage below.
- E-commerce and fulfillment centers: Add picking locations for individual products, cartons and smaller orders.
- Manufacturing facilities: Create additional storage for production components, maintenance supplies and inventory.
- Wholesale distributors: Accommodate a wide variety of products while making better use of available warehouse height.
- Retail distribution centers: Organize merchandise and backstock on an elevated level above existing storage.
- Industrial supply companies: Store tools, fasteners, fittings and other small industrial products on upper-level shelving.
- Third-party logistics warehouses: Configure storage to accommodate different products and changing customer inventory requirements.
- Pharmaceutical and medical supply distributors: Add organized storage for boxed products and supplies, subject to applicable storage and environmental requirements.
Whether you operate a small parts warehouse or a large distribution facility, a pallet rack supported mezzanine can help you make better use of your existing space.
Optional Safety Features and Material Handling Accessories
Pallet rack supported mezzanines can be customized with safety features and material handling accessories to suit your warehouse operation.
Depending on the design, available options include:
- Handrails: Help protect employees along exposed edges of elevated walkways and platforms.
- Safety netting: Helps contain materials and reduce the risk of items falling from elevated storage areas.
- Pallet drop areas: Provide designated locations for transferring pallets between levels.
- Floor keepers: Can help keep designated materials or areas properly contained, depending on the accessory and application.
- Chutes: Provide a controlled path for moving suitable materials from an upper level to a lower level.
- Kick plates: Help prevent tools, products and other items from sliding or falling off elevated platform edges.
- Loading gates: Provide designated material transfer openings while helping maintain appropriate fall protection when the opening is not in use.
- Vertical reciprocating conveyors: Move materials between designated levels when an operation requires regular transfers between floors.
The right combination depends on your layout, the products you handle and how employees use the system. Safety features must be selected and installed to meet applicable codes and the requirements of the specific application.
FAQ’s About Pallet Rack Supported Mezzanines
What is a pallet rack supported mezzanine?
A pallet rack supported mezzanine is an elevated storage structure built using pallet rack components. It creates additional usable storage space above the existing warehouse floor without requiring an expansion of the building footprint. Depending on the design, it can include an elevated catwalk with storage on multiple levels or a solid upper deck for shelving and order picking.
Are pallet rack supported mezzanines economical?
Yes. They can provide an economical way to increase warehouse storage capacity using standard pallet rack components. The two-level catwalk configuration is generally the more economical design because it doesn’t require a continuous upper deck. The overall cost depends on the dimensions, load requirements, access arrangements, decking and accessories.
Can a pallet rack supported mezzanine be customized?
Yes. These systems can be designed for a wide range of applications, from small storage areas to large warehouse installations. The configuration can accommodate different layouts, storage requirements and access methods, including stairways, rolling ladders, loading gates and vertical reciprocating conveyors.
Can a pallet rack supported mezzanine be moved to another location?
In many cases, yes. The system can be disassembled and reassembled in another location, provided the components remain in suitable condition and are compatible with the new design. The relocated system must be evaluated to ensure it meets the structural and safety requirements of the new installation.
Can a vertical reciprocating conveyor be added to a pallet rack supported mezzanine?
Yes. A vertical reciprocating conveyor can be incorporated into a warehouse layout to move materials between the ground floor and upper storage levels. The conveyor must be appropriately selected and coordinated with the mezzanine design, material transfer points and applicable safety requirements.
Do pallet rack supported mezzanines require a building permit in Ohio?
In many cases, a building permit and engineered drawings may be required. Depending on the design and application, fire department approval or additional fire protection measures may also be necessary. Requirements vary by jurisdiction and can depend on the structure, intended use, storage conditions and existing sprinkler system. Check with your local building department to determine which approvals apply to your project.
How much weight can a pallet rack supported mezzanine hold?
Capacity depends on the engineered design, the rack components, the decking and the loads the structure must support. Before selecting a system, determine the required floor loading, stored product weights and any concentrated loads associated with equipment or material handling. The system should be designed and approved for its intended use.
Find Pallet Rack Supported Mezzanines in Ohio
If you need more warehouse storage space, a pallet rack supported mezzanine may be an economical way to make better use of your existing facility. Whether you need a two-level pallet rack system with a catwalk or a solid deck mezzanine with upper-level shelving, Midwest Material Handling can help you explore a configuration that fits your space and operation.
We work with businesses throughout Ohio to provide pallet rack and warehouse storage solutions for a wide range of applications. Contact Midwest Material Handling to discuss your warehouse storage needs and learn how a pallet rack supported mezzanine can help you get more out of your existing space.
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