2,500 lb SWL bulk bags

Two kinds of 2,500 lb bag

This rating covers two opposite jobs. At the dense end, dry sand at an assumed 100 lb per cubic foot fills the 24.8 cubic foot 35 x 35 x 35 at 2,480 lb, and gravel at 95 lb at 2,356 lb: short, squat bags that hit 2,500 lb with almost no slack. At the light end, plastic pellets at 34 lb fill a 41 x 41 x 72 at 2,380 lb and a 45 x 45 x 60 at 2,390 lb: tall or wide bags where volume, not strength, was the problem.

In between, granular fertilizer at 60 lb fills a baffled 37 x 37 x 52 at 2,472 lb, sugar at 50 lb fills a 41 x 41 x 48 at 2,335 lb, and seed corn at 45 lb fills a 35 x 35 x 70 at 2,232 lb. The common thread is a fill that overshoots 2,200 lb and stays under 2,500 lb.

The two ends share a rating and little else. The sand bag is often uncoated Type A fabric, filled from a loader or a hopper and emptied by cutting the bottom on a jobsite. The resin bag may be coated and lined, Type B, C or D according to the site's hazardous-area assessment, and emptied through a spout into a vacuum loader. Same number on the label, very different bag.

12,500 and 15,000

At 5:1 the type test is 2,500 x 5 = 12,500 lb; at 6:1 it is 2,500 x 6 = 15,000 lb. The service load is 2,500 lb either way. A 5:1 bag is a single-trip bag and goes to a recycler after use; a 6:1 bag can go round again inside a managed program, with an inspection before each fill.

In metric, 2,500 / 2.20462 = 1,134 kg, which does not sit on a round metric rating. If a buyer's spec is in kilograms, convert it and order the matching bag; do not assume 2,500 lb is a metric size.

Recycling closes the loop for single-trip bags. Clean, empty polypropylene bags can go to a buy-back or recycling pickup instead of a dumpster, and we book those collections. Bags that held hazardous product follow their own disposal rules.

Where 2,500 lb fits by volume

Volume needed for 2,500 lb at our assumed densities: pellets at 34 lb per cubic foot, 73.5 cubic feet; flour at 36 lb, 69.4; seed corn at 45 lb, 55.6; sugar at 50 lb, 50.0; fertilizer at 60 lb, 41.7; cement at 90 lb, 27.8; gravel at 95 lb, 26.3; sand at 100 lb, 25.0.

Two of those land just outside our size list. 73.5 cubic feet of pellets is more than the biggest box here, 70.3, so a resin bag at this rating fills to the top under 2,500 lb. And 25.0 cubic feet of sand is a hair over the 35 in cube's 24.8, so a sand bag of that size tops out about 20 lb short. Flour at 69.4 just fits the 45 x 45 x 60, and fertilizer at 41.7 is just over the baffled 37 x 37 x 52's 41.2, which is why that bag fills at 2,472 lb.

Handling and the truck

A 2,500 lb sand bag is compact and heavy; a 2,500 lb resin bag is six feet of fabric. Both lift the same way: every loop on the forklift tines or on one crane hook or bar, loops vertical, nobody under the load. Tall bags need the forklift mast and the fill frame checked for height before the first one goes up.

On the assumed 44,000 lb payload, 44,000 / 2,500 = 17 bags, 42,500 lb. Short 35 in bags give 36 floor spots and wide 45 in bags give 28, so the payload sets the count both ways.

Storage differs as much as handling. A short sand bag in a yard may wait outdoors for a short spell under a tarp; a tall resin bag normally stays indoors, out of UV, on a clean floor or pallet. Fabric that has gone powdery on the surface from sun is past lifting, whatever the label says.

• Dense end: 35 x 35 x 35, duffle or open top, flat or spout bottom, Type A
• Light end: 41 x 41 x 72 or 45 x 45 x 60, spout or duffle top, spout bottom
• 5:1 single trip unless the bag runs in a managed multi-trip loop