Heavy Stacking and Open-Top Display Roles
Agricultural and Produce Stacking
The open top allows for ventilation and easy access, while the reinforced corners help support the weight of multiple loaded trays stacked on a pallet.
Heavy Industrial Parts
The double-wall sides and internal corner columns act as built-in blocking, helping to keep heavy metal or dense components from shifting into the corners during transit.
Master Shippers for Retail Cartons
When shipping smaller retail boxes, the corner columns bear the pallet weight, reducing the risk of crushing the inner cartons.
Fragile or Heavy Glass Jars
The corner posts help block jars from shifting into the absolute corners and help support the weight of stacked trays in retail or storage settings.
Agricultural, Industrial, and Retail Environments
Retail-Ready Displays for Heavy Goods
For products like glass jars or dense liquids, the tray provides base support for shelf loading while keeping the primary products visible. The corner columns can also help frame the products.
Agricultural Supply Chains
Field packing operations often use this style when produce needs to be stacked high on pallets immediately after picking, relying on the corners to help protect the bottom layers.
Industrial Component Distribution
Facilities moving heavy parts between locations use the corner blocking to help keep dense items centered during transit.
When to Compare a Standard Roll-End Tray
High-Volume Automated Packing
If your fulfillment line relies on automated tray erectors, the complex corner pre-folds of the EVC41069 may slow down the process. A standard machine-erected tray or a simpler roll-end tray is often a better fit for automation.
Lightweight Products
If the tray does not need to support heavy vertical loads, the extra material and folding time required for the corner buttresses may not be justified. Compare a standard FEFCO 0422 or 0435.
Board Thickness, Assembly Labor, and Internal Clearance
Board Grade and Flute Profile
The complex folds used to form the triangular corners are sensitive to heavy or rigid board grades. While double-wall board offers maximum strength, it increases the risk of cracking at the corner folds. E or B flute is generally easier to assemble.
Internal Volume Reduction
The triangular buttresses occupy physical space inside the tray. The internal clearance should be calculated taking these columns into account, as products may not sit flush into the absolute corners.
Assembly Labor Allocation
This is a manual-assembly package. The fulfillment team should plan for the multi-step process of pre-folding the corner angles before rolling the inner walls down to lock the base.
Outer Shipping Requirements
Because this is an open-top tray, it does not enclose contents for mixed-carrier courier networks on its own. Decide if a separate lid or an outer master shipper is needed for the final route.
Adjusting the Corner Columns and Locking Tabs
Corner Column Width and Angle
The width and angle of the triangular buttresses can be adjusted to change the size of the internal column, balancing stacking support against usable interior space.
Locking Tongue Dimensions
The size of the locking tabs and the receiving slots in the base can be modified to help keep the base locked, especially if the board thickness changes.
Corner Column Height
The height of the buttress can be adjusted relative to the overall tray height, depending on how much vertical support or product blocking is needed.
Packing details
Flatbed Die-Cutting Requirements
Because of the angled cuts for the corner columns and the internal receiving slots in the base, this tray is produced on flatbed die-cutting equipment rather than simpler rotary slotters.
Additional notes
Physical testing for corner fold behavior
Because the corner columns rely on precise angled folds, a physical sample helps verify that the chosen board grade folds cleanly without cracking and that the locking tongues seat properly in the base.
FAQs
Can this tray be erected on automated packaging lines?
The triangular corner buttresses rely on a specific, angled pre-fold before the side walls can be rolled down and locked. This makes it a manual-assembly package unless highly specialized tooling is developed.
How much internal space do the corner columns take up?
The exact volume depends on the specified width and angle of the buttresses. When sizing the tray, you should account for the fact that square or rectangular products may not slide all the way into the absolute corners of the base.
Can we use a heavy double-wall board for maximum stacking strength?
While double-wall board increases compression strength, it can cause issues with the complex corner folds. The tight angles used for the buttresses may crack or bind if the board is too thick. Physical prototyping is recommended if moving away from standard single-wall flutes.
Is this tray suitable for parcel shipping?
This is an open-top tray designed for palletized stacking, retail display, or master shippers. It does not have a lid and does not enclose contents for a mixed-carrier courier network without a separate outer box.
Does the tray require glue or tape to stay assembled?
The tray uses a mechanical tongue-and-slot system. The inner side walls roll over and lock into receiving slots in the base panel, keeping the structure and corner columns in place without adhesive.
Why does this tray use more material than a standard tray of the same size?
To form the corner buttresses, the inner side walls must extend further across the flat blank. This creates a larger, more irregular footprint that increases the overall corrugated board used per unit.
How high can we stack these trays?
The safe stacking height depends on the chosen board grade, the weight of the product, and the storage environment. The corner columns provide vertical support, but physical compression testing is recommended for heavy pallet loads.
Can the corner columns be printed?
Because the corner columns are formed by extensions of the inner side walls, printing applied to the inside surface of the flat blank will generally be visible on the buttresses once the tray is assembled.
