4,400 lb (2,000 kg) SWL bulk bags

The heaviest rating here

2,000 x 2.20462 = 4,409 lb; labels round it to 4,400 lb, and 4,400 / 2.20462 = 1,996 kg back the other way. It is the 2,000 kg class, two metric tonnes in one bag, and 409 lb more than two short tons.

A purchase order that reads 2 t, 2,000 kg or 4,400 lb describes the same class of bag. Confirm the safety factor and the unit the maker rated it in, since the test loads follow that unit.

Test loads: 2,000 kg x 5 = 10,000 kg for single trip, 2,000 kg x 6 = 12,000 kg for multi trip. On the pound label, 4,400 x 5 = 22,000 lb and 4,400 x 6 = 26,400 lb. Whichever unit the spec uses, the safety factor is exactly 5:1 or 6:1 and the label says which.

What reaches 4,400 lb

Only dense product. At our assumed densities, dry sand at 100 lb per cubic foot fills a 39 x 39 x 50 at 44.0 x 100 = 4,400 lb, right on the rating, and a 35 x 35 x 60 at 4,250 lb. Gravel at 95 lb fills the 39 x 39 x 50 at 4,180 lb and the 35 x 35 x 60 at 4,038 lb. Cement at 90 lb fills a 41 x 41 x 48 at 4,203 lb. Granular fertilizer at 60 lb comes close in the largest bags: 4,200 lb in a 41 x 41 x 72 and 4,218 lb in a 45 x 45 x 60.

A 35 x 35 x 70 would hold 4,464 lb of cement at box volume, over the rating, so it stops at the label with a few inches of slack. Frac and industrial sand, cement, mineral concentrates and heavy aggregate are the usual fills, and for each one the product's own bulk density, not ours, decides the bag.

Volume per 4,400 lb

At our assumed densities: pellets at 34 lb per cubic foot, 129.4 cubic feet; flour at 36 lb, 122.2; seed corn at 45 lb, 97.8; sugar at 50 lb, 88.0; fertilizer at 60 lb, 73.3; cement at 90 lb, 48.9; gravel at 95 lb, 46.3; sand at 100 lb, 44.0.

Everything from fertilizer down the density scale is too light to use this rating in a standard bag; even 73.3 cubic feet of fertilizer is more than the 70.3 of the biggest box. The working range is cement, gravel and sand, from 44.0 to 48.9 cubic feet: a 39 x 39 x 50 for sand, a 41 x 41 x 48 at 46.7 for gravel, and a 35 x 35 x 70 at 49.6 for cement, filled to the label.

The rating is reached by density, not size. These bags look ordinary from across a warehouse, no larger than a one-ton bag of fertilizer, and that is the risk: someone assumes a familiar weight. Mark full bags with their weight where drivers can read it, and brief new staff before the first heavy order lands.

At this weight a filling error is costly. Calibrate the fill scale, weigh each bag, and print the net on a tag in the document pouch; a bag that reads 4,520 lb is 120 lb over a 4,400 lb label and must be partly emptied before anyone lifts it.

Two tonnes on the forks and the trailer

A 4,400 lb bag needs a lift truck rated for it at the load centre the bag sets, with tines long enough to carry all four loops. Keep the loops vertical, lift smoothly, travel low, and never jerk a dense bag off the floor; a sudden pull puts far more than the static weight on the loops. For overhead lifts, every loop goes on one hook or a rated bar, and nobody stands in the drop zone.

On the assumed 44,000 lb payload, 44,000 / 4,400 = 10 bags. A 39 in floor has 32 spots, so ten bags weigh as much as a full trailer while covering under a third of it. Concentrated loads like that need the carrier's placement and securing plan before the first bag goes on.

Trailer floors and dock plates have ratings of their own. A forklift carrying a 4,400 lb bag onto a trailer puts bag, truck and driver on the dock plate at once, so check that its capacity covers the total.

Road limits apply per axle as well as in total, so ten bags clustered near the middle of the trailer can overload the tandem even when the gross is legal. The carrier's loading diagram, not guesswork, decides where each bag sits.

Inspect before every fill, and retire bags with damage or sun-softened fabric; users do not repair them.

Oil and gas, glassmaking, foundries and water filtration all draw on dense sands and minerals, and many of their sites already run heavy lift trucks. The bag is the part that has to match: a 2,000 kg rating, the safety factor the site's rules call for, and loops sized for those tines.