3,000 lb SWL bulk bags

Heavy fills, ordinary bags

At 3,000 lb the bag is doing real work. Cement users, mineral processors, fertilizer blenders and aggregate suppliers moving specialty sand all fill here. The bag sizes are ordinary; the fabric, the loops and the seams are heavier to carry a ton and a half.

On construction work, specialty sands, mortar blends and grouts often come in bags of this class, set by a crane or a telehandler onto a hopper or a silo top. Lifting gear on site should be checked for the full 3,000 lb plus any frame or spreader it hangs from.

Examples from our assumed densities: portland cement at 90 lb per cubic foot fills a 35 x 35 x 45 at 2,871 lb; granular fertilizer at 60 lb fills a 41 x 41 x 48 at 2,802 lb and a 35 x 35 x 70 at 2,976 lb; sugar at 50 lb fills a 41 x 41 x 60 at 2,920 lb, and seed corn at 45 lb fills the same 41 x 41 x 60 at 2,628 lb. Dry sand in a 35 x 35 x 45 would be 3,190 lb at box volume, so a 3,000 lb sand bag of that size stops at the label just below the top.

Fifteen thousand and eighteen thousand

3,000 x 5 = 15,000 lb for a single-trip bag; 3,000 x 6 = 18,000 lb for a multi-trip bag. Those loads are what sample bags of the design had to survive in type testing. They give no headroom in use: a 3,000 lb bag carries 3,000 lb.

A note on what the test proves: passing 15,000 lb in a lab shows the design holds a wide margin when new. It says nothing about a bag that has been sun-baked, dragged or cut. Damage spends that margin, which is why inspection before each fill is the rule.

In kilograms, 3,000 / 2.20462 = 1,361 kg. A 1,500 kg bag is 3,307 lb, a different rating, usually labelled 3,300 lb. If your spec is metric, order the metric rating.

ISO 21898:2024, published 16 August 2024 to replace ISO 21898:2004, sets the materials, construction, design, type test and marking requirements for FIBCs carrying non-dangerous solids. Ask for the bag maker's test documents against it, or against whichever standard your customer names.

Volume per 3,000 lb

Our assumed densities give: pellets at 34 lb per cubic foot, 88.2 cubic feet; flour at 36 lb, 83.3; seed corn at 45 lb, 66.7; sugar at 50 lb, 60.0; fertilizer at 60 lb, 50.0; cement at 90 lb, 33.3; gravel at 95 lb, 31.6; sand at 100 lb, 30.0.

Pellets and flour never reach 3,000 lb in any size here; the biggest box, 70.3 cubic feet, tops out at 2,390 and 2,531 lb. The rating is for product from about 45 lb per cubic foot up. Seed needs a 41 x 41 x 72 or a 45 x 45 x 60. Fertilizer at 50.0 is just over a 35 x 35 x 70 at 49.6. Sand at 30.0 fits a 35 x 35 x 45 at 31.9; cement at 33.3 needs the 35 x 35 x 50 at 35.4, since the 45 in bag stops at 2,871 lb.

Forklifts and trailers at a ton and a half

A 3,000 lb bag is more than some light lift trucks carry at the load centre a big bag sets. Read the capacity plate for the attachment and load centre you use. Put the tines through every loop, keep the loops vertical, and travel with the bag low.

Fill lines at this weight often set the bag on a pallet over a load-cell deck and fill to a cut-off. Set the cut-off below the SWL, not at it, so product still falling when the gate shuts does not push the bag past its rating.

44,000 / 3,000 = 14 bags on the assumed payload, 42,000 lb. On a floor of 36 spots for 35 in bags, 14 bags leave most of the trailer empty and the weight concentrated, so the carrier sets the pattern for axle weights and the securing.