What should change first in a cold-room Stackable Container?

Answer: Compound and step width. Homopolymer PP cracks at the corners after 48 hours at -25 °C.

Why not put line-side stock on high racking?

Answer: Turnover does not pay for it. At 12 movements a shift, put-away costs more than the carry.

Can a chemical bay go three high?

Answer: Not advised. The upper tier must clear within a minute of a spill.

Why not use paper labels on a Stackable Container in a clean zone?

Answer: Edges lift, lifted edges collect dust, and the label fails a wipe test.

How is the fold ratio calculated?

Answer: Folded height over open height, inverted, 280 mm against 90 mm giving 1:3.1.

Stackable Container Applications: Scenarios and Configurations

Quick answer: Sites differ by three variables, not outer shape: how many high, what locates the unit, and which compound survives temperature and static. Line-side work wants pick height, cold rooms want toughness, clean zones want a wipeable surface.

Six Roles, Three Variables
Line-Side Loops and Finished-Goods Racking
Cold Chain and Clean Zones
Chemical Segregation and Field Storage
Cross-Border Consolidation and the Matrix
FAQ

1. Six Roles, Three Variables

One Stackable Container, footprint 600 × 400 × 280 mm, in a line-side cell and then in a freezer: three lines on the drawing change, namely stack height, locating feature and wall compound. The footprint matters least.

Height is squeezed three ways. The bottom lid carries the column, the pick face caps the reach, the shift decides how fast the pile comes down. Hand picking keeps the top rim under 1.4 m, four high at most.

Role	Batch per turn	Stack	Location	Dominant variable
Line-side loop	20 to 60 units	4 high	Corner cones	Pick height
Finished-goods store	300 units and up	3 high on pallet	Flat base, stops	Pallet fit
Cold room buffer	40 to 120 units	3 high	Rim step	Cold toughness
Clean-zone transfer	10 to 30 units	2 high	Flat step	Surface roughness
Chemical bay	15 to 40 per bay	2 high	Flat base, sump	Segregation

2. Line-Side Loops and Finished-Goods Racking

A line-side Stackable Container turns over with the shift, about 12 times a day. Four corner cones, 8 mm tall on a 15° flank, drop into lid recesses. Under 6 mm the column shears at a nudge; over 10 mm the operator lifts higher. At 5 mm of wear the lock is friction, not geometry.

Stackable Container: a closed black case on a workshop bench, a moulded rib along its side, coiled grey cable in front, instruments and shelving behind

Finished goods run the other way: beams at 1.8 m, six units on a 1200 × 1000 mm pallet, three loads high, a cross rib crossing the boards. Cones are dead structure here and foul the boards.

3. Cold Chain and Clean Zones

Homopolymer polypropylene loses impact strength around -20 °C, and after 48 hours at -25 °C cracks start at the corners. Copolymer PP or HDPE, R10 corners and a 3.5 mm wall bring the rate down; two ribs inside the lid hold warp within 1.5 mm.

Clean zones change the surface, not the strength of a Stackable Container: below Ra 0.8 µm an alcohol wipe leaves no film, R8 corners clear in one pass, screw heads sit sunk. Static is held between 10^6 and 10^9 ohm with carbon black, never a migratory additive.

4. Chemical Segregation and Field Storage

Segregation precedes stacking. Three blocks by compatibility, three colours of Stackable Container mapped to them, no borrowing. Bund volume at 110 per cent of the largest unit, a 25 mm upstand as a sump with no drain, since a drain routes the spill past the bund. Two high, because the upper tier must clear in under a minute.

Stackable Container: a black case strapped down on a ribbed truck floor, open cargo door and timber pallets in the background

Field storage is governed by wind: two high at 30 kg per unit, a force 8 wind of 17.2 m/s already tips the column. A 3° lid sends water off the back edge instead of into the gasket.

5. Cross-Border Consolidation and the Matrix

Cross-border work puts the value in the return leg. 280 mm open against 90 mm folded is 1:3.1; a 40-foot high cube takes 480 folded units against 156 open ones. A 100 × 50 mm SSCC label goes on four faces, a 20 × 20 mm laser code 40 mm down from the rim.

Role	Stack	Location	Compound and special requirement
Line-side loop	4 high	Corner cones, 8 mm	Copolymer PP, 8 mm step
Finished-goods rack	3 high on pallet	Flat base, stops	Copolymer PP, cross rib
Cold room buffer	3 high	Step widened to 12 mm	Cold-grade copolymer
Clean-zone transfer	2 high	Flat step	Virgin PP, Ra 0.8, R8
Chemical bay	2 high	Flat base with sump	Antistatic, 25 mm upstand
Cross-border	8 high folded	Nesting	Copolymer PP, laser code

Read the matrix right to left: compound, then location and height, then volume.

Conclusion

Six roles converge on one table: height, location, compound. Line-side work caps height at the pick face, finished goods hands location to the pallet, cold rooms change compound, clean zones change the surface, chemical bays add a sump. Site before drawing is the cheapest habit in a Stackable Container programme.

This article discusses only the container (case body) side of specifications and design intent, and does not cover any handling, loading or use of the contents.