Can Case Warehouse Storage specifications copy a competitor's envelope?

Answer: No. The envelope falls out of load and interior, and their interior holds other items. Copy the shape and the tier count fails first.

Is a thicker wall always safer?

Answer: No. Each millimetre adds 1.6 kg, so four tiers put 4.8 kg more on the base. Stiffness comes from ribs, not thickness.

Why is the outside tolerance ±8 mm?

Answer: It is ±1.5% or ±3 mm, the larger, and 528 mm gives ±7.9 mm. Rotomolding shrinks unevenly, so a tighter limit halves the pass rate.

Should the Case Warehouse Storage spec include a stacking test?

Answer: Yes, with duration: 210 kg for 24 hours, then base deflection measured and residual set kept under 2 mm.

How do the interior and foam insert fit?

Answer: Interior ±4 mm, insert at 2 mm interference. Under 1 mm it shifts in transit, over 4 mm it needs a press.

Three Lines That Fix Case Warehouse Storage Specifications

Quick answer: Case Warehouse Storage specifications derive from load upward: what the bottom case carries, plus wall thickness on the interior, held by ribs. At 9.8 kg empty, four tiers and a 2.5 factor, only one envelope fits.

Line One: Where the Load Comes From
Inside Dimensions to Outside Envelope
Wall Thickness and Rib Geometry
Stack Height and Base Pressure
Seal Groove, Air Pressure and IP Rating
Four Numbers the Spec Sheet Must Fix
FAQ

1. Line One: Where the Load Comes From

Case Warehouse Storage specifications start with weight, not shape: empty case, loaded case, tier count. Empty weight sets the wall baseline, loaded weight the stack load, tiers the shelf limit.

At 9.8 kg empty, 28 kg loaded and four tiers, the bottom case carries 84 kg for years. Polyethylene creeps at 40 °C, so a 2.5 factor lifts the design load to 210 kg, the real input for wall and ribs.

Item	Value	Note	Effect
Empty weight	9.8 kg	Envelope estimate	Wall baseline
Loaded weight	28 kg	Heaviest build	Stack load
Tiers	4	1050 mm pitch	Base load
Factor	2.5	Creep at 40 °C	Design margin
Design load	210 kg	84 × 2.5	Wall and rib input

Counting three tiers on a four-high stack is the usual error.

2. Inside Dimensions to Outside Envelope

The interior comes from the longest item plus 10 mm clearance per side and 15 mm at the lid; 520 × 320 × 210 mm holds a 500 mm part without tilting.

Case Warehouse Storage: three yellow-green rotomolded cases on a pale bench, front one open with grey lining and firewood, two closed cases behind

Wall thickness adds face by face: 4.0 mm per side, 5.0 mm base, 3.5 mm lid, giving 528 × 328 × 219 mm. At 2.8% shrinkage the cavity is cut to 543 × 337 × 225 mm.

Tolerances are written apart from dimensions: outside ±1.5% or ±3 mm, so ±8 mm at 528 mm; interior ±4 mm, because the foam insert is an interference fit.

Axis	Inside	Wall	Outside	Tolerance
Length	520 mm	4.0 each side	528 mm	±8 mm
Width	320 mm	4.0 each side	328 mm	±8 mm
Height	210 mm	5.0 base + 3.5 lid	219 mm	±8 mm

3. Wall Thickness and Rib Geometry

Case Warehouse Storage wall thickness is three numbers: 4.0 mm sides, 5.0 mm base, 3.5 mm lid. The base takes stacking and fork entry; the lid is thinnest because ribs carry its stiffness.

Ribs make a thin wall behave. At 10 mm height, 95 mm pitch, R3 root and 1.5 degrees draft, a 4.0 mm side wall approaches a 6 mm panel for 8% more weight.

Powder flows unevenly around corners, so the thinnest section stays above 60% of the thickest: a 5.0 mm base sets a 3.0 mm side minimum.

4. Stack Height and Base Pressure

Four tiers reach 876 mm, and with a 144 mm pallet the stack stands 1020 mm. Shelves sit at 1050 mm pitch, leaving 30 mm for fork entry.

Case Warehouse Storage: close view of a dark green case on rocky ground, two latches on the parting line, a folding handle, pines behind

Base pressure works out at the surface: 0.173 m² carries 84 kg, about 485 kg/m² against a floor rated 3000. The feet are the risk: four 25 mm feet take 21 kg each, and a root radius under R5 whitens.

Two constraints cap tiers: the 1050 mm shelf above, and people below, who drag anything over 25 kg.

5. Seal Groove, Air Pressure and IP Rating

The seal groove is 6 mm wide and 4 mm deep, gasket at 25% to 30% compression. Under 20% contact stress falls away as the shell moves through a temperature cycle; over 35% the rubber takes set.

Warehouse handling needs IP6X only: talc at 2 kg/m³, 20 mbar negative pressure, 8 hours. Outdoor transfer adds IPX5: 6.3 mm nozzle, 12.5 litres per minute, 3 minutes.

Temperature and drop clauses travel with them: -40 °C to +71 °C to MIL-STD-810H Methods 502.7 and 501.7, and 1.5 m drops over 6 faces, 3 edges and 1 corner with no through-crack.

6. Four Numbers the Spec Sheet Must Fix

A Case Warehouse Storage spec sheet does not need ten pages. Four numbers fixed in writing are enough.

Envelope and tolerance: 528 × 328 × 219 mm, ±8 mm at the widest point.
Three walls: 4.0 mm side, 5.0 mm base, 3.5 mm lid, ±0.5 mm, points marked.
Tiers and unit weight: four tiers, 28 kg loaded, 210 kg design load, 2.5 factor.
Protection: IP6X plus IPX5, with talc concentration, jet flow and duration.

One footnote sits below them: interior tolerance ±4 mm. That single line decides whether assembly passes.

Conclusion

Case Warehouse Storage specifications form one chain: 210 kg of design load, a 528 × 328 × 219 mm envelope, 10 mm ribs at 95 mm pitch holding a 4.0 mm wall, and a 1050 mm shelf pitch with IP6X. Fix the four numbers and Case Warehouse Storage specifications stop moving at sampling.

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.