Several key differentiators make SpanTrack the leading carton flow solution. Here are the top 5 reasons why SpanTrack is better than other carton flow solutions:

1. SpanTrack carton flow solutions provide the most surface contact, so weight is distributed evenly to optimize product flow and eliminate hang-ups on the track.
2. Shelf Track carton flow systems provide up to 300% more product contact than plastic wheel rails.
3. UNEX carton flow solutions increase throughput by up to 150% compared to picking from pallets.
4. SpanTrack and Shelf Track’s patented design easily drops into existing structures with very little effort.
5. UNEX carton flow solutions are backed by an industry-leading 7-year warranty.

If your SKU locations vary in size and often change, wheel beds (SpanTrack Wheel Bed) are recommended for maximum flexibility left-to-right for re-slotting. Dedicated lanes (SpanTrack Lane) are recommended for fixed or predictable SKU locations.

Yes, SpanTrack easily drops into existing pallet racks and can easily be relocated to other areas or facilities as needed.

UNEX customer service is available during normal business hours to assist you with new or existing projects, or to answer product-related questions. You can click here to contact us, and someone will be in touch with you shortly. If you want to speak with someone immediately, please call 800-334-8639.

Pricing varies depending on your space, the requirements for your specific application, and the combination of track type, end styles, and flow options being used. The quickest way to obtain pricing is to use our SpanTrack product configurator. We will send your design straight to your inbox, and one of our product specialists can work with you to refine the solution to meet your unique needs.

Roller/Wheel Centers refers to the spacing within a section of SpanTrack. As product increases in length, additional space can be added between rollers/wheels. Other factors like humidity, condition of box, bottom surface of tote, weight of box, and more need to be considered. Having closer centers can increase flow reliability with these other factors.

Gravity! The most powerful (and free) force in the universe.

Steel rollers are more durable than aluminum rollers and have a low slope needed for long runs. Steel rollers are more expensive, but they are built to withstand harsh environments and difficult workflows.

Yes! SpanTrack Lane is freezer/cooler rated to below zero and is often used to store and flow temperature-sensitive goods. SpanTrack Lane is a popular choice for cold chain operations due to its freezer/cooler rating and durable, rugged construction.

SpanTrack Lane is available in 6 different widths (6", 9", 12", 15", 18", 24") and at varying capacities. Product width will be the primary factor in determining lane width. Product can overhang the lane, up to 3" on either side and maintain flow.

SpanTrack Lane is offered in 3 main capacities or “series”. Our 98 series rollers are our lightest capacity tracks. 98 Series SpanTrack Lane carton flow rollers are .75” inches in diameter and can be made in aluminum or steel, and are rated starting at 35 lb. per linear foot. Our 99 series carton flow rollers are considered standard-duty and are typically the most common. 99 series rollers are rated starting at 50 lb. per linear foot. Our 100 series carton flow rollers are our heaviest-duty carton flow solution. 100 series SpanTrack Lane rollers are 1.38” in diameter and are made of galvanized steel with bearings. 100 series roller lanes are rated starting at 100 lb. per linear foot.

SpanTrack Wheel Bed Widths are determined by the best track combination that fits within the width of the racking. Example: for a 96" wide bay, you can use (4) 18" wide beds & (2) 12" wide beds. This will create a 96" wide level of carton flow.

Yes! SpanTrack Wheel Bed is freezer/cooler rated to below zero and is often used to store and flow temperature-sensitive goods. SpanTrack Wheel Bed is a popular choice for cold chain operations due to its freezer/cooler rating and durable, rugged construction.

SpanTrack Wheel Bed is offered in 3 main capacities or “series”. Our 98 series wheel beds are our lightest capacity tracks. 98 Series SpanTrack carton flow beds are made with 1.6” hex hub wheels. These plastic wheels offer low friction to ensure smooth flow. 98 series SpanTrack Wheel Bed is rated starting at 35 lb. per square foot. Our 99 series carton flow beds are considered standard-duty. They are made with 1.6” plastic hex hub wheels and are rated starting at 50 lb. per square foot. Our 100 series carton flow beds are our heaviest-duty, wheel-based carton flow solution. 100 series SpanTrack Wheel Bed is made of 1.9” skatewheels. These skatewheels are made of steel and each wheel has a bearing, making it one of the most rugged solutions on the market. SpanTrack 100 series Wheel Bed is rated starting at 100 lb. per square foot.

SpanTrack Wheel Bed empowers warehouses to handle dynamic inventory with ease by providing a flexible and efficient solution for frequent SKU reslotting without sacrificing storage density or productivity. Unlike dedicated lane systems, SpanTrack Wheel Bed utilizes a full 'bed' of independently rotating wheels that floods an entire level of pallet racking. This allows you to store products of varying widths side-by-side on the same shelf, eliminating the need for fixed lane widths. This flexibility is crucial when dealing with constantly changing product mixes or seasonal inventory variations.

Often, distributors will store beer kegs on the floor, which means order pickers have to bend and lift the heavy kegs. UNEX Keg Flow offers an alternative to palletized storage that consolidates floor space, reduces bending, and improves stock rotation. Travel time and mis-picks for order pickers are reduced. Most importantly, Keg Flow allows distributors to offer a greater number of beer variations in a small space. Using Keg Flow, distributors can increase their warehouse capacity while improving efficiency and productivity.

UNEX Keg Flow systems are designed to accommodate a variety of standard keg sizes, including Sixth Barrel, Quarter Barrel, Slim Quarter, and Half Barrel. Each lane handles both 1/6 and 1/4 slim kegs. While Keg Flow is suitable for these common sizes, we recommend consulting with one of our product specialists to be sure you're tailoring your Keg Flow system to meet the unique needs of your business, especially if you are dealing with 1/4 and 1/2 barrels.

UNEX Keg Flow 11-3/4" wide tracks allow storage of 8 kegs across in a 96" wide bay.

Keg Flow offers a maximum capacity of 45 lb. per roller. Keg Flow's frame capacity depends on the support centers. For 8 ft. support centers, Keg Flow frame capacity can support a maximum uniformly distributed load of 1,000 lb. For 5 ft. support centers, it can support 2,100 lb.

SpeedCell costs the same or less per SKU stored compared to static shelving. Pricing varies depending on your space and requirements for your specific application. The best and fastest way to obtain pricing is to use our SpeedCell product configurator. We will send your design straight to your inbox and one of our product specialists can work with you to refine the solution to meet your unique needs.

There is no one-size-fits all approach when it comes to SKU storage, but after analyzing millions of SKUs, our Sales and Engineering teams have determined that 12” x 12” (Medium) SpeedCell columns are the most commonly ordered size.

Each SpeedCell capacity is rated at 240 lb. per column and 35 lb. per each cell.

Yes, SpeedCell can be customized for orders over 50 columns. We can tailor the size, shape, and mobility of each SpeedCell column to solve your exact storage challenges. There are some limitations on sizes: 6″ is our minimum width, and 24″ is our maximum width. We offer 2 standard colors of White and Grey. If you have a special color for your facilities, we will gladly order fabric in colors dyed to your specifications at an increased cost and lead time to allow for purchasing materials.

No. SpeedCell units are easily cleaned with plain water. For stubborn stains such as pen marks, Goo Gone works wonders. As a bonus, our standard white material is Electric Static Resistant, Flame Resistant, and fully complies with the California fire code. SpeedCell Columns are also easy to install and remove from the tracks, even once your bay is installed. No special tools are needed.

Yes, SpeedCell is mold-resistant and operates in temperatures of -20°to 180°F (-29°to 82° C).

Yes, pick-to-light, RFID, and scanners are all compatible with UNEX SpeedCell.

Nope! Special racks are not required for UNEX SpeedCell. If you have existing pallet racking, you are ready to install SpeedCell. SpeedCell can be suspended within the selective rack or wide-span rack systems and fits any type of beam, box, structural, or step, as well as pick modules and mezzanines. If you do not already have racking or would like to purchase new racking, we offer SpeedCell Ready Bay which comes with SpeedCell columns in your choice of size, a fully assembled SpeedCell steel set suspension system, UNEX-supplied racking, and wire deck for extra storage space above your SpeedCell bay.

SpeedCell columns slide from side-to-side, and each row of SpeedCell has one less column, easily allowing pickers to access the back rows.

UNEX high-density storage solutions are manufactured and assembled in North America.

High-density storage solutions are space-efficient systems designed to maximize the amount of material stored within a warehouse or retail storage space. These systems smartly use physical space to store more inventory within a smaller footprint without compromising access or efficiency. It’s not a single technology or method, but rather a category of storage systems designed to help warehouses, distribution centers, and production facilities manage more SKUs in less space.

High-density storage isn't one-size-fits-all. Common systems include Automated Storage and Retrieval Systems (ASRS) for high-volume automation, Vertical Lift Modules (VLMs) for vertical space efficiency, modular bin shelving for small or slow-moving items, and dynamic systems like mobile or cell-based storage for flexible, high-density picking. The right solution depends on your operation’s size, speed, SKU mix, available space, and budget.

Yes. All UNEX high-density storage solutions like SpeedCell and Pick Shelves, for example, are designed to fit into existing structures. This allows you to upgrade storage capacity without a complete overhaul. Our team of experts can assess your current setup and tailor a solution that will work within your footprint and with your existing infrastructure.

UNEX Pick Shelves are easy-to-mount and customizable, offering a simple and effective tool for improving pick rates. Our Pick Shelves are angled to provide clear visibility and accessibility at the pick point. Adjustable shelves and pick trays provide the most durable, flexible and accessible pick points for workers.

Pick Shelves are frequently used in manufacturing supermarkets, lineside storage, and order picking applications. They’re ideal for storing slow-moving SKUs or components at the point of use, improving visibility, ergonomics, and pick accuracy in both fulfillment and manufacturing/assembly environments.

The “dead zone” refers to the hard-to-reach area at the back of flat shelving where products are often overlooked, underpicked, or require awkward reaching. UNEX Pick Shelves eliminate this by angling inventory toward the front, keeping items visible and within easy reach, improving pick speed, accuracy, and ergonomics.

UNEX SpeedCartt is a mobile, high-density picking cart designed to streamline order fulfillment and inventory movement. It features durable columns made up of cells that can hold individual SKUs or completed orders ready to be transported throughout your facility. SpeedCartt works well for various order picking methods by reducing travel time, improving picking speed, accuracy, and overall warehouse efficiency.

SpeedCartt comes in multiple sizes and configurations to suit diverse operational needs. We offer 4 different cart sizes, 8 different column sizes, and 16 different cart combinations. Standard cart widths include 48" and 60", with depths of 18" or 24". Configurations for single-side or back-to-back loading for greater SKU accessibility are available. 

SpeedCartt is ideal for warehouses, distribution centers, and retail replenishment where fast and accurate picking are essential. SpeedCartt excels in batch picking, zone picking, and pick-and-pack operations, especially when dealing with high SKU counts or fast-moving inventory. Its modular design adapts well to both small and large-scale operations seeking to optimize space and workflow efficiency.

SpeedCartt minimizes worker travel by bringing inventory directly to pickers, allowing for batch picking of multiple orders simultaneously. The individual cells organize SKUs or completed orders, reducing errors and speeding up sorting and packing. Its sturdy, mobile design supports ergonomic handling, helping reduce worker fatigue and increasing overall fulillment speed.

Due to its extreme flexibility and modularity, thousands of FlowCell modular flow racks can be engineered to create the ideal solution for your specific needs. This makes it very difficult to provide specific pricing! The average price of our FlowCell flow racks is around $1,000, but to get the most accurate pricing, we recommend designing your solution using our FlowCell configurator. We will send your design straight to your inbox, and one of our product specialists can work with you to refine the solution to meet your unique needs.

All FlowCell posts are rated at 10,000 pounds. Mobile FlowCell units are rated at 3,000 pounds maximum (750 lb. per caster). We recommend considering the weight of the tracks and structure when calculating total loads.

While it may make sense for you to install carton flow into your existing pallet rack for certain applications, FlowCell modular flow racks may make more sense if you’re looking for a modular solution that offers more flexibility and allows for frequent process changes. Here are our top 4 reasons to choose FlowCell over pipe and joint or aluminum extrusions:

• FlowCell is much faster to install (30 to 60 minutes per unit).
• Pipe and joint systems are not as durable. With FlowCell, you don’t have to worry about constantly replacing broken joints.
• UNEX offers best-in-class flow with SpanTrack, The Original Carton Flow Track.
• FlowCell is a total solution that is tailored to meet your specific requirements. Other solutions are sold as more of an “off-the-shelf” kit. Because of this, customers purchase parts they don’t really need. Another downside to this approach is that customers don’t necessarily get the support they need to create solutions that are engineered specifically for their operations. Our team of experts will work with you to ensure you are designing a FlowCell solution that will meet your immediate needs and allow maximum flexibility to adapt to process changes over time.

“FlowCell blue” is our standard color for this solution, but color alternatives are available upon request (price will be provided at the time of request). You can choose alternate colors, including white, gray, or ivory. UNEX can also match any RAL color #. Approximate colors can be referenced at: https://www.ralcolor.com/

FlowCell hole diameters are .4375" and punched on 1" centers. FlowCell foot plate dimensions are industry standard 4" x 4.5". FlowCell posts are stocked in 6” increments from 18” through 84”. Other sizes are available upon request. FlowCell beams are available in 6" increments from 12" to 96" long. Beam sizes can also be ordered in to-the-inch increments for a small setup fee. Please contact us for pricing on custom sizes.

Casters are available in fixed and swivel. The wheel is glass-filled polypropylene with a sealed precision bearing. Wheel diameter is 4” x 2” wide. Material is phenolic, and the manufacturer is Colson. Load Rating: 750 lbs. per caster. Swivel lock is also available. Other sizes, materials, and types of casters are available upon request.

UNEX offers a number of FlowCell accessories, including toolbars, workbenches, casters, add-on pick trays, and pick shelves. We offer a steel work surface in 12” and 18” depths. Brackets are available separately for attaching the third-party work surface of your choice to FlowCell posts.

FlowCell beams 60″ and longer are constructed from 12 gauge steel tubing. FlowCell beams under 60″ are constructed from 14 gauge steel tubing. All FlowCell posts are manufactured from 12 gauge steel tubing.

You can buy individual components to build your flow racks. We recommend using our FlowCell product configurator so you can ensure you are designing units that will be effective for your unique application. Our team will engineer your FlowCell to order. This way, you get exactly what you need without overpaying for parts you won’t use. All of the engineering that goes into creating your tailor-made solution is free, so we encourage customers to take advantage of this powerful tool!

UNEX Flow Racks enhance warehouse efficiency by facilitating FIFO (First-In, First-Out) inventory rotation, reducing clutter, and improving accessibility. They support lean principles by minimizing waste and optimizing space utilization. These racks are ideal for order picking, packing, and assembly operations, ensuring a streamlined workflow.

All UNEX modular flow racks can be tailored to your specific operational needs. UNEX FlowCell and Roller Rack provide adjustable units suitable for various applications. All UNEX flow racks accomofate different product and carton sizes and workflows, and can be customized with different flow options, tracks, end treatments, and accessories.

Virtually any type of track is compatible with UNEX flow racks. We recommend using our SpanTrack carton flow rollers or SpanTrack wheel beds.

Pre-engineered gravity flow racks are proven to speed pick rates, increase space utilization, and ensure FIFO rotation. SKU storage is up to 7 times more dense per bay than pallet position storage, which means up to 80% less travel time for pickers. Roller Rack is ideal for fulfillment, manufacturing, and retail operations where carton flow is required, and there is no need to store pallets above the rack.

UNEX Roller Rack is compatible with both SpanTrack Lane and SpanTrack Wheel Bed carton flow tracks. SpanTrack Lane is best for uniform carton sizes and fixed-lane applications, providing full-width roller lanes with various flow options. SpanTrack Wheel Bed is ideal for operations with varying carton sizes, as it allows for flexible re-slotting. Both track types drop into Roller Rack beams without tools and deliver smooth, durable flow.

UNEX Roller Rack ships knocked down for cost-effective delivery and is designed for quick, tool-free assembly. Roller Rack features drop-in beam clips, carton flow hangers, and tracks for fast installation and adjustability. Roller Rack can be setup in a matter of minutes in just 4 easy steps; secure the uprights, set the beams, drop in your carton flow hangers and tracks, and test the pitch. For full details, Roller Rack installation instructions can be found here along with all other UNEX product instructions: https://www.unex.com/resources/installation-guides

Roller Rack is available in widths of 4' and 8' and depths of 4', 6', and 8'. Roller Rack uprights are 84" high by 24" or 48" deep. Roller Rack beams are 14 gauge, 1-5/8" x 3-1/2" and can support 3,000 lb. capacity over uniformly distributed load per pair — 4' and 8'.

Pricing for Gravity Conveyor depends on the combination of components and the size and materials required for your specific application. While most conveyors are sold in 5 or 10-foot lengths, UNEX manufactures gravity conveyor side channels to the inch, allowing you to order precisely what you need. This saves our customers time and money by eliminating the need to saw-cut sections to length and provides more options to meet unique demands.

Skatewheel Gravity Conveyor is ideally suited to convey lightweight packages, where operations require portable or temporary conveyor lines such as warehousing or shipping areas. Here are the top 3 reasons you may want to choose skatewheel conveyor for your application:

• Skatewheel conveyors require less pitch or angle to transport product.
• Empty boxes and very light loads travel better because the force required to start several wheels in motion is less than a full-width roller.
• Product tracking is better on skatewheel conveyors, especially on curves, as the differential action of the individual wheels allows the product to maintain its original position on the conveyor.

Yes, containers with ring-banded bottoms, drums with chimes, most bagged items, and cartons with flimsy or soft bottoms cannot be handled on a skatewheel conveyor.

Gravity rollers are an almost universal answer when it comes to handling products with a smooth, flat bottom. Gravity Conveyor rollers can be used in flat (level) lines with the product being pushed manually or set at a decline, allowing the load to move forward by gravity. Roller conveyor is also well-suited for order picking applications – both for dynamic storage and pick conveyors used along the front of the rack.

Yes, UNEX makes both skatewheel and 1 ⅜” diameter roller in an aluminum construction. The frames, wheels, or rollers are lightweight aluminum, making them easy to set up and takedown. Portable tripod supports are used to allow for quick setup – the conveyor cross members nest into the top of the support, and height adjustments require no tools. This makes them ideal for setting up temporary lines for loading dock applications.

Gravity conveyors are a cost-effective, low-maintenance alternative to powered systems. They’re ideal for operations that need simple, efficient product movement without the complexity or expense of automation. UNEX gravity conveyors require no electricity, have minimal upkeep, and are easy to reconfigure as workflows change. They’re perfect for staging, packing, loading, and other manual handling zones where automation isn’t necessary or practical.

Gravity conveyors are used to move cartons, totes, or flat-bottomed items in a wide range of applications. Common uses include order picking, packing stations, shipping and receiving, work-in-process staging, and assembly lines. UNEX gravity conveyors are especially effective for creating flow racks, flexible workstations, or connecting different areas of a warehouse without the need for powered equipment.

Carton flow systems use closely spaced rollers on a slight incline to store and feed products for order picking with FIFO rotation. Gravity conveyors are heavier-duty roller or wheel systems designed to transport cartons or totes between work areas. Carton flow focuses on inventory storage and picking, while gravity conveyors handle product movement throughout a facility.

UNEX offers Gravity Conveyors and Pallet Track pallet flow systems. UNEX Gravity Conveyor uses rollers or skatewheels to move cartons and totes throughout a facility. UNEX Pallet Track is a pallet flow system that uses rollers or wheel rails designed specifically for pallet storage and handling. Both Gravity Conveyor and Pallet Track require zero power to operate, making them ideal solutions for minimizing energy consumption and maintenance costs.

UNEX Pallet Track is a gravity-powered pallet storage and handling system designed to optimize inventory flow and storage density. It uses rollers or wheel rails installed on a slight incline to move pallets from the loading side to the picking side, ensuring first-in, first-out (FIFO) inventory rotation. This system reduces the need for forklifts to navigate aisles, minimizing labor costs and potential damage to inventory.

UNEX Pallet Track is versatile and can accommodate various pallet types. Roller tracks are suitable for single-face and Euro-style pallets, while wheel tracks are ideal for GMA-style wooden pallets with bottom boards perpendicular to the flow. This flexibility ensures efficient flow for different pallet types.

UNEX Pallet Track can be tailored to fit your specific operational needs. Tracks are available in lengths ranging from 48" to 144" in 1" increments and can be floor-mounted or supported by pallet rack beams. Additional features include anti-backup stops, spring-loaded rear stops, and end treatments to further customize Pallet Track to meet the unique needs of your operation.

UNEX Pallet Track differs from other pallet flow systems by offering a customizable and flexible approach to pallet storage and picking, particularly within a pick line. It can be floor-mounted or rack-supported, and is designed for both heavy loads and busy order flows. Unlike some systems, it can be tailored to specific needs with varying track lengths and mounting options.

Yes, application drawings are available when you receive a quote from us.

All UNEX products are engineered and assembled in North America. Our manufacturing facility and company headquarters are located in Lakewood, NJ.