Can the cavity of a grenade transport container be sized by unit count?

No. Dividers, four-side cushioning and a recessed base that removes another 10 mm all sit outside net dimensions.

Is a thicker wall always safer?

No. Thickness raises tare weight, the bottom case carries more, and the tier count can fall.

Where does the 90 kg lid figure come from?

Two tiers at 28 kg gives about 56 kg, plus margin for off-centre load and creep, rounded to 90 kg.

What changes for cold duty?

Flat panel to 4.5 mm minimum, corner radii of 8 mm or more, lower service temperature stated.

Can the cavity change once the external size is fixed?

Only downwards, out of wall thickness or cushioning allowance; growing it means recalculating the pallet module.

Grenade Transport Container: Size, Wall Thickness, Load

Quick answer: A grenade transport container is fixed on three axes. Footprint and cavity follow pallet and container modules, wall thickness comes backwards from drop height and temperature, load is checked for full weight, stacking and lifting. Lock the footprint, calculate thickness, verify load last.

Three axes to settle at the same time
Dimensions: the cavity chain and pallet modules
Wall thickness from drop energy
Load: full weight, stacking and lifting points
Writing a specification sheet that can be inspected
FAQ

1. Three axes to settle at the same time

Three axes of a grenade transport container mesh without slack: footprint and cavity set how many units fit a container row, thickness sets how much structure survives a drop, load rating sets the rack height. Whichever axis habit fixes first forces the other two to give way.

Axis	What it fixes	Failure when set wrong
Footprint and cavity	Container rows, unit volume	Gaps in loading, cavity too tight
Wall thickness	Impact resistance, tare weight	Corner cracking, latch pull-out
Load rating	Stack height, lifting method	Top sag, stack slip, lug tearing

The usual wrong order quotes an external size, stuffs a cavity inside, then thickens walls. Such a footprint rarely divides into a 1200 mm by 1000 mm pallet, so each row leaves a 40 mm gap and volume freight climbs. Reverse it: lock length and width against the modules first, then derive thickness from the cavity chain.

2. Dimensions: the cavity chain and pallet modules

The cavity of a grenade transport container runs from the inside out. One item at 78 mm by 56 mm by 42 mm with 8 mm per side, four rows by three columns, needs 420 mm by 312 mm by 190 mm. A 4 mm wall, 6 mm corner blocks and a 12 mm latch boss bring the external size to about 486 mm by 378 mm by 236 mm.

That footprint fits four per layer on a 1200 mm by 1000 mm pallet with 120 mm spare; a 500 mm by 400 mm footprint still fits four but leaves 40 mm. The 2350 mm internal width of a 40 ft high cube is the second check.

A recessed base with 8 mm ribs stops slip by structure, but costs about 10 mm of usable height.

3. Wall thickness from drop energy

Ten impacts on six faces, three edges and one corner from 1.2 m set the bound. A panel under 3.0 mm whitens by the second edge hit; 4.0 mm to 4.5 mm balances impact against tare weight; rib roots and hinge seats need 6 mm.

At minus 20 °C impact strength sits well below room temperature, so a corner that only whitens warm may crack at the same 1.2 m. Cold duty starts the flat panel of a grenade transport container at 4.5 mm with corner radii of 8 mm.

A 6 mm stainless pin in a boss below 5 mm of wall, opened 2000 times at 10 N·m, wears oval and the lid rocks.

4. Load: full weight, stacking and lifting points

Full weight covers case plus contents at a typical 28 kg and drives handle and base. Stacking puts roughly 56 kg on the bottom lid at three tiers, tested at 90 kg for 24 hours with residual deflection under 2 mm.

Load type	Reference figure	Design meaning
Full weight	28 kg per unit	Handle, base and latch sizing
Stacking	90 kg on lid for 24 hours	Lid rib height, panel thickness
Lifting	150 kg static per lug	Extent of local thickening

Four lugs at 150 kg static each cover dynamic factors and off-centre picks; where the lug wall matches the flat panel, a lift tears the lug out with a patch of panel.

5. Writing a specification sheet that can be inspected

A grenade transport container sheet is complete only when a third party can test against it: each parameter with a measuring method and a pass limit.

Item	What the sheet must state	How it is inspected
Cavity	Length, width, depth, plus or minus 1.5 mm	Callipers at three positions
Wall thickness	Flat panel and reinforced zones apart	Ultrasonic gauge, sectioned corners
Lid pressure	Load, duration, residual limit	Uniform load 24 hours, centre gauge
Latch retention	Opening force range per latch	Force gauge, every latch

Conclusion

A grenade transport container converges footprint, thickness and load into one sheet with measuring methods, and acceptance stops being a negotiation. Ask for pallet module and tier count first, then settle the remaining figures of the grenade transport container.

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.