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Frequently Asked Questions


Carton Flow

How quickly can I get a carton flow solution installed?

All UNEX products are engineered-to-order, and lead time depends on the size and complexity of your order. However, average lead times for our SpanTrack solution range from 5 to 12 weeks.

How is UNEX carton flow better or different than the competition or what we already have?

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.

When should I use carton flow rollers, and when should I use wheel beds?

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.

Why should I use steel carton flow rollers instead of aluminum? What is the cost difference?

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 difficult workflows and are backed by a 7-year warranty.

Can SpanTrack be relocated after installation?

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

Who can I call if I have questions or need help with my carton flow solutions?

UNEX’s customer service team 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.

How much does SpanTrack cost?

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 Space Optimization Specialists can work with you to refine the solution to meet your unique needs. Get in touch with a Space Optimization Specialist today to determine the solution that best fits your unique needs.

What makes the rollers and wheels turn?

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

Where is SpanTrack made?

SpanTrack is manufactured and assembled in our Lakewood, NJ, facility.


High Density Storage

How much does a SpeedCell high-density storage system cost?

To give you an idea, SpeedCell costs the same or less per SKU stored compared to static shelving, for example. 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 Space Optimization Specialists can work with you to refine the solution to meet your unique needs.

What is the most commonly used cell size?

Product size can be variable, and operations must accommodate all SKUs, but that’s hard to do with a one-size-fits-all approach! Thus, after analyzing millions of SKUs, we’ve discovered that 12” x 12” (Medium) is the most common size for most industries. 

What is the weight capacity per column? What is the weight capacity per cell?

240 lbs. or 108 kg per column
34 lbs. or 15.4 kg per cell

Can SpeedCell be customized for my products?

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.

Is there any maintenance required?

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. Columns are also easy to install and remove from the tracks, even once your bay is installed, and require only a standard ladder to remove. No special tools are needed.

Can I use SpeedCell in freezers and climate-controlled areas?

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

Can I use Pick-to-Light, RFID, or scanners with SpeedCell?

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

Do I have to buy special racks for SpeedCell?

Nope! Special racks are not required for UNEX SpeedCell. If you have an existing pallet rack, 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.

How do I access the back row on a SpeedCell unit?

Each row of SpeedCell has one less column, easily allowing pickers to access the back rows.

Where is SpeedCell made?

SpeedCell is manufactured and assembled in North America.


Flow Racks

How does FlowCell compare in price to other flow racks like pipe and joint or aluminum extrusions?

Due to its extreme flexibility and modularity, thousands of FlowCell combinations 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 Space Optimization Specialists can work with you to refine the solution to meet your unique needs.

What is the capacity of a FlowCell unit?

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

Why should I use FlowCell over pipe and joint or aluminum extrusions or install carton flow into my existing pallet rack?

While it may make sense for you to install carton flow into your existing pallet rack for certain applications, FlowCell 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 tailor-made 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 unique applications. 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.

Can I design my own FlowCell unit?

Yes! You can configure FlowCell units using our UNEX FlowCell Configurator. The configurator tool allows you to design your own solution that will meet your specific requirements. You can start from scratch or choose from popular configurations. We will send a 3D drawing of your design straight to your inbox, and a Space Optimization Specialist will reach out to provide you with a quote.

What type of tracks work with FlowCell?

Virtually any type of track is compatible with FlowCell. We recommend using our SpanTrack carton flow rollers or SpanTrack wheel beds. UNEX Cell Track (S5) is specifically designed for use with FlowCell. The track features an integrated hanger/impact/label holder on the charge end and stop/label holder on the discharge end. UNEX Cell Track for trays (S6) is also available. High Profile, Deck, Knuckle, and gravity may also be used.

Does FlowCell only come in blue?

“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:

What type of finish do FlowCell components have?

All flowcell components are powder coated with a gloss blue using TGIC polyester. This is a high quality finish with excellent chemical and fade resistance and weatherability. This coating meets ASTM B117-97 for 1000 hours, A=8, B=10. We can provide a data sheet upon request – just click here to contact us.

What size posts are available for FlowCell?

Posts are stocked in 6” increments from 18” through 84”. Other sizes are available upon request.

What are the hole sizes on the FlowCell posts?

All hole diameters are .4375” and punched on 1” centers.

What size beams are standard for FlowCell?

Beams are available in 6” increments from 12” to 96” long (and 15”). Actual beam length is NOMINAL + 0.375”.

Are custom beam sizes available FlowCell?

Yes. Beams can be ordered in any inch increment for a small setup fee ($45 list per size) for quantities under 100. Please connect with a space optimization specialist for pricing on custom sizes.

What are the FlowCell foot plate dimensions?

Foot plate dimensions are an industry standard 4” x 4.5”.

Are casters available for UNEX FlowCell?

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.

Does UNEX offer accessories for FlowCell?

UNEX offers a number of FlowCell accessories, including toolbars, workbenches, casters, add-on pick trays, and pick shelves.

What type or work surfaces do you offer for FlowCell?

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.

Is hardware included?

Yes, all FlowCell beams are supplied with 2 FCBK1 bolt kits. Each kit includes two (2) custom 3/8” flange bolts and (2) 3/8 whiz nuts.

What is the beam capacity for an FCB?

FCB72 and under are rated at 2,000 pounds per pair. FCB78 and greater are rated at 1,000 pounds per pair.

What size retainer angle do I need for my FlowCell?

Retainer angles can be ordered in lengths 1.5″ shorter than the corresponding beam length. For example: 98A0x40.5 for an FCB42.

Are there any general building requirements for FlowCell units?

UNEX prefers that most FlowCell units contain a minimum of two (2) beams between each connection, regardless of the number of levels. When including high profile tracks, we recommend the depth of the structure is at least twice the length of the high profile overhang to prevent tipping.

What gauge steel are FlowCell structures made of?

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.

What is the warranty for your FlowCell solution?

UNEX FlowCell comes with an industry-leading 7-year warranty.

How can I change sizes without scrapping my entire FlowCell unit?

There is no need to scrap your entire FlowCell unit to make size changes! You can purchase additional posts and beams to accommodate any size changes easily.

What are the benefits of Roller Rack?

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 the fulfillment, manufacturing, and retail operations where carton flow is required, and there is no need to store pallets above the rack.

Can I buy individual components to build my own flow racks?

You can buy individual components to build your flow racks. However, 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!

Where is FlowCell made?

FlowCell is manufactured and assembled in North America.



How much does UNEX Gravity Conveyor cost?

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. Click here to contact our Space Optimization Specialists for more information, or call us at 800-334-8639.

What is your lead time for Gravity Conveyor?

All UNEX products are engineered-to-order, and lead time depends on the size and complexity of your order. However, average lead times for Gravity Conveyor solutions range from 3 to 12 weeks.

What is your standard warranty on Gravity Conveyor?

UNEX warranty on Gravity Conveyors is 2 years.

When should I use a skatewheel conveyor?

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:

  1. Skatewheel conveyors require less pitch or angle to transport product.
  2. 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.
  3. 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.

Are there items that cannot be conveyed on a skatewheel 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.

What are some examples of roller conveyor uses?

Gravity roller is an almost universal answer when it comes to handling products with a smooth, flat bottom. Gravity 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. Gravity rollers are also well-suited for order picking applications – both for dynamic storage and the pick conveyor used along the front of the rack.

Can you provide a portable conveyor?

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.

Where is UNEX Gravity Conveyor made?

UNEX Gravity Conveyor solutions are made to order in our Lakewood, NJ, facility.


General Questions

Can I get a drawing of my project?

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

Where are UNEX products made?

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

Connect with an Expert

Reach out to our team of experts to ask questions and learn more about our space optimization solutions.