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FEFCO 0122

Corrugated U-Channel Inserts

  • Available in a wide range of custom configurations & material selection.
  • Order 1 sample. Or order 100K+ units. Or anything in between.
  • Affordable delivery across North America.
  • Design support, warehousing, testing, assembly available.
  • Widest machinery capability in America via 30+ specialist partner plants.
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Product details

Top highlights

  • Folds into a three-panel U-channel for internal separation
  • Requires a master carton or external tension to hold its shape
  • Ships completely flat for maximum pallet density

About this product

A flat corrugated sheet with two parallel score lines across its width. When folded, it forms a U-shaped channel that divides master cartons, buffers side shocks, or reinforces vulnerable product edges.

Because it has no native closures or interlocking tabs, this component relies entirely on the walls of an outer box, shrink wrap, or external strapping to hold its shape. It is a simple, highly scalable way to add targeted protection exactly where a product requires it.

Common uses

  • Dividing heavy industrial components inside a bulk shipper.
  • Creating a lateral cushion against the walls of a master carton.
  • Capping the vulnerable edges of large furniture or panels.

Get a quote

Share what you know. We'll take it from there. Or email us at info@herculeindustrial.com

Best Price Guarantee

Already have a packaging quote? Let us beat it.

Send us the quote you have. We will beat it for the same specifications, quantity, and delivery requirements.

Upload a competing quote

Free quote review. No obligation.

30+specialist partner plants

We supply through the plant best suited to your price, material, production, and delivery requirements.

Why we can beat a lower quote

30+ plants give us more ways to lower the price.

Each plant has different machinery, material costs, order minimums, and freight rates. Our buying volume helps us secure better pricing. We then quote through the plant that gives you the lowest total price for your requirements.

Send us your current quote. Watch us beat it.

Attach it to the quote form or email it to us. We'll review it free and send you our price.

Upload a competing quoteinfo@herculeindustrial.com
Best Price Guarantee terms

To qualify, send a written supplier quote dated within the past 30 days and addressed to your company. It must cover the same dimensions, construction, material, print, finish, quantity, tooling, freight, delivery date, and delivery location. The guarantee does not cover taxes, expired quotes, liquidation or clearance sales, or obvious pricing errors.

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Internal separation and edge protection roles

Dividing master cartons

When placed inside a larger shipping box, the U-channel creates distinct layers or sections. The upright legs transfer top loads and prevent heavy industrial components from shifting into each other during transit.

Side-wall buffering

Positioned against the inner walls of a master carton, the folded side panels act as spring-like bumpers. This absorbs side shocks and keeps fragile goods away from the exterior crush zones.

Capping vulnerable edges

The sheet can be folded inward to cover the long edges of furniture, wooden panels, or heavy appliances. The corrugated board prevents strapping bands from biting into the product and absorbs direct edge bumps.

Parallel void fill

By folding the sheet into a Z-shape or an offset U-shape, packers can quickly fill empty space next to an odd-shaped product, preventing it from sliding across the base of the master carton.

Packing environments using U-channel inserts

Industrial B2B shipping

Heavy metal parts, motors, and bulk hardware often require physical separation inside a shared master case. A U-channel provides that physical barrier without the complexity of a fully interlocking partition grid.

In-plant kitting and assembly

For internal transfers between manufacturing stations, these inserts drop quickly into reusable totes or master boxes. The simple two-fold motion keeps packing labor low while keeping components organized.

Furniture and flat-pack transport

Long, heavy wooden panels or glass tops require dedicated edge protection before going into a master box. The U-channel wraps the vulnerable perimeter to prevent chipping during transit.

When to consider a different insert style

When vertical column strength requires a different flute direction

Corrugated board is strongest when the flutes run parallel to the applied weight. If folding a sheet across its width forces the flutes into a weak horizontal orientation for the specific load, a lengthwise-creased U-channel (0112) may provide better vertical crush resistance.

When the product only requires a single corner guard

If the job requires an L-shaped corner guard rather than a full U-channel wrap, a single-crease L-board (0121) uses less material and serves the same edge-protection function.

Close variants and lookalike dielines

The closest library neighbors include 0121, 0123, 0112. Use this as a variant check if a buyer brings an old code, sample, or dieline that looks close. The deciding details are usually the lock, slot, closure, wall build, part count, or fold sequence.

Master carton fit, flute orientation, and board choice

Master carton internal clearance

Because this insert relies on friction to hold its shape, the folded dimensions must closely match the internal dimensions of the master box. A loose fit allows the U-channel to collapse, while a tight fit causes the side panels to bow inward.

Flute direction and load bearing

The orientation of the corrugated flutes determines whether the side panels act as rigid support columns or flexible shock absorbers. Discussing the primary risk, top-down crushing versus side-impact shock, helps determine the correct material specification.

Board grade selection

A standard single-wall board works well for basic separation, but heavy industrial parts may require double-wall board to prevent the upright legs from buckling under top weight.

Packing station layout

Since these arrive completely flat, the packing line must have space for operators to manually break the scores and fold the channels before inserting them into the master cartons.

Asymmetric legs, creasing, and print options

Asymmetric side panels

The two upright legs do not have to be equal heights. The score lines can be offset to create an asymmetric U-shape, which is useful for packing stepped products, uneven components, or creating a specific offset angle inside the box.

Double-creasing for heavy board

If the job requires thick double-wall corrugated board, the factory can apply double creases to prevent the inner liner from cracking when folded to a sharp 90-degree angle.

Printed part numbers or instructions

While usually left plain, the flat sheet can be printed with part numbers, orientation arrows, or simple packing instructions to help operators place the insert correctly.

Board and packing details

Delivery and storage footprint

These inserts ship completely flat. Because they have no glued seams or pre-folded joints, they stack densely on a pallet, taking up minimal warehouse space before they are needed on the packing line.

Manual assembly rhythm

The assembly process is a simple two-step manual fold. There are no tabs to lock or tape to apply, making it a fast addition to a manual packing line, though it cannot be easily erected by automated machinery.

Shape modifications

Z-Fold Application

The same double-creased sheet can be folded in opposite directions to create a Z-shape, useful for parallel void fill.

Additional notes

Flute direction and vertical load

If the packing setup relies on the insert to support heavy items stacked on top of it, the flutes must align with that vertical load. A mismatch here can cause the side panels to buckle under pressure.

Related internal packaging

0112: Lengthwise U-Channel

Look at this option if corrugator nesting or the required flute direction for vertical strength dictates folding along the long axis.

0100: Flat Pad

Look at this option if the job requires a simple layer divider without upright cushioning legs.

0123: Commercial Sheet

Nearby FEFCO style to review if the buyer wants a similar job but the closure, flap overlap, wall build, or part count changes the package choice.

FAQs

Shipping and Route

Can this be used as a standalone shipping box?

No. This is an internal component. It has no closures and must be placed inside a sealed master carton or secured heavily with external strapping to travel through a shipping network.

Product Fit and Assembly

How does the insert stay folded?

It relies entirely on friction and external pressure. Once folded and inserted into a master carton, the walls of the outer box keep the U-channel from springing back into a flat sheet.

Board and Strength

What determines the strength of the side walls?

The board grade and the flute direction. If the flutes run vertically up the side panels, they act as strong support columns. If they run horizontally, the panels act more like flexible bumpers.

Production and Quantity

Is this usually a simple insert to produce?

Usually, yes. The basic version is a rectangle with two straight score lines. The harder part is making sure the channel width, side height, flute direction, and board grade match the packed product and the outer carton.

Product Fit and Assembly

Can the two side panels be different heights?

Yes. Moving the score lines to create asymmetric legs is a standard adjustment when packing uneven products or creating specific internal compartments.

Comparison

How do I know if I need widthwise or lengthwise creases?

It usually comes down to which way the corrugated flutes need to run to support the specific product weight, and how the flat sheet best fits onto the manufacturing equipment. Sharing the master carton dimensions and product weight helps determine the better choice.

Product Fit and Assembly

Does this insert require tape or glue to assemble?

No. The sheet is simply folded by hand and placed into the box. The pressure from the product and the outer carton walls holds it in place.

Can I use this to protect the corners of a table or desk?

Yes. The sheet can be folded inward over the long edges of furniture or large panels to prevent strapping bands from biting into the product and to absorb direct edge bumps.