Weight &
load.
If you are specifying a rack, a mezzanine or a lift, tell us the product and we will send the loaded figures in writing.
Gross weight = gallons × 8.345 × specific gravity + tare. A 275 gallon tote is 125 lb empty, 2,330 lb of water, 3,170 lb of corn syrup. Stack empties four high and filled units two high on level concrete only. Floor loading is 175 lb/sq ft filled, 350 stacked. Legal truck payload is 43,500 lb, which is 18 filled water totes.
Tare weight by pallet type
| Configuration | Tare |
|---|---|
| 275 gal, all-plastic base | 118 lb |
| 275 gal, composite base | 124 lb |
| 275 gal, steel base | 132 lb |
| 330 gal, composite base | 136 lb |
| 330 gal, steel base | 152 lb |
| 550 gal, steel base | 265 lb |
| Cage only, 275 gal | ≈48 lb |
| Stainless 550 gal | 450 – 700 lb |
Gross weight by product
| Product (SG) | Gross, 275 gal unit |
|---|---|
| Diesel / heating oil (0.85) | ≈1,998 lb |
| Vegetable oil (0.92) | ≈2,152 lb |
| Water (1.00) | ≈2,330 lb |
| Propylene glycol (1.04) | ≈2,418 lb |
| Brine, saturated (1.18) | ≈2,726 lb |
| Latex paint (1.25) | ≈2,880 lb |
| Corn syrup (1.38) | ≈3,166 lb |
| Sulphuric acid, 93% (1.84) | ≈4,178 lb |
Assumes a 264 gallon nominal fill and a 125 lb tare. Acids and oxidisers also raise a compatibility question — see poly vs. stainless.
Floor loading, which is where people get caught
A 275 gallon unit occupies 13.3 square feet. At 2,330 lb that is 175 lb per square foot. Stacked two high it is 350 lb/sq ft, and with a heavy product stacked two high it passes 475.
For reference: a typical industrial ground-floor concrete slab handles 250–500 lb/sq ft; a steel mezzanine is commonly rated 125–250; an older timber-framed upper floor can be as low as 75. Stacking filled totes on a mezzanine is one of the more reliable ways to find out what its rating actually was.
Forklift capacity and load centre
A forklift's rated capacity applies at a stated load centre, almost always 24 inches. An IBC is 40 inches deep, so its centre of mass sits roughly 20 inches out — close enough to standard that derating is modest for a 275. A 550 gallon unit is 48 inches deep and nearly 4,900 lb, which combines a heavier load with a worse load centre, and that combination is how a nominally adequate truck tips.
Rule of thumb we give customers: filled 275s need 5,000 lb, filled 330s need 5,000 lb with margin, filled 550s need 6,000 lb, and filled stainless 550s need 8,000 lb.
Stacking rules, as rules
- Empty: four high, cages interlocked, level floor.
- Filled: two high, level concrete only, cages seated and square.
- Filled in a trailer: single tier, always. No exceptions.
- Never stack a filled unit on a unit with a damaged or racked cage.
- Never stack onto a composite or plastic base that shows deck cracking.
- Oversize units: do not stack filled, at any time.
The safety and stacking article covers bracing, bunding and what actually happens when one fails.
Quick maths
- Water
- 8.345 lb per US gallon
- Gross formula
- gal × 8.345 × SG + tare
- 275 gal footprint
- 13.3 sq ft
- 550 gal footprint
- 20.7 sq ft
- Legal payload
- 43,500 lb
- Filled 275s per truck
- 18
- Empty 275s per truck
- 48, double-stacked
Unknown product?
Design to SG 1.4. It covers everything short of concentrated acid and costs you nothing but a little conservatism in a rack calculation.
Run the numbersWeigh it before you lift it
Pick a product, drag the fill level, and the tool returns gross weight and how many fit on a legal load.
Net product weight 2,295 lb. Gallon and litre figures assume a straight-walled bottle; the real bottle tapers at the shoulder, so treat anything above 95% as nominal and always leave headspace for thermal expansion.
Weight & load questions
How much does a full IBC tote weigh?
Multiply gallons by 8.345 by the product's specific gravity, then add the tare. A 275 gallon tote of water is 264 × 8.345 × 1.0 + 125 = about 2,330 lb. The same tote of corn syrup at SG 1.38 is about 3,170 lb. People consistently underestimate the second number and then wonder why the forklift complains.
What specific gravity should I assume if I do not know?
Assume 1.2 and you will be safe for almost everything except syrups and heavy brines. Water is 1.0, diesel 0.85, vegetable oil 0.92, glycol 1.04, latex paint 1.25, brine 1.18, corn syrup 1.38, and sulphuric acid 1.84. If you are designing a rack or specifying a lift, design to 1.4 and sleep at night.
Can my forklift handle a full tote?
Check the nameplate at your actual load centre, not the headline capacity. A 5,000 lb truck is rated 5,000 lb at a 24-inch load centre; a 48-inch-deep IBC puts the centre of mass further out, which derates the truck. A filled 275 gallon water tote at 2,330 lb is comfortable. A filled 550 gallon unit at 4,860 lb on a 5,000 lb truck is not, whatever the nameplate says.
How high can I stack them?
Empty: four high, cages interlocked, on a level floor. Filled: two high maximum, level concrete only, cages properly seated, and never in a moving trailer. The cage is designed to carry one filled unit above it in static storage — that is the design limit, not a conservative guideline.
What is the legal truck payload?
43,500 lb for a typical 53-foot dry van on US interstate highways, after tractor and trailer weight is deducted from the 80,000 lb gross limit. That works out to 18 filled 275 gallon water totes, which is why filled totes are weight-bound and empties are cube-bound.
Gross weight for every format and product
Gross weight = gallons × 8.345 × specific gravity + tare. Everything below is that formula applied.
| Product | SG | 120 gal | 275 gal | 330 gal | 550 gal |
|---|---|---|---|---|---|
| Ethanol | 0.79 | 862 lb | 1,867 lb | 2,319 lb | 3,885 lb |
| Diesel / heating oil | 0.85 | 921 lb | 1,998 lb | 2,485 lb | 4,165 lb |
| Vegetable oil | 0.92 | 990 lb | 2,152 lb | 2,678 lb | 4,490 lb |
| Water | 1.00 | 1,070 lb | 2,329 lb | 2,900 lb | 4,855 lb |
| Milk | 1.03 | 1,100 lb | 2,395 lb | 2,983 lb | 4,993 lb |
| Propylene glycol | 1.04 | 1,110 lb | 2,417 lb | 3,011 lb | 5,039 lb |
| Brine, saturated | 1.18 | 1,250 lb | 2,725 lb | 3,400 lb | 5,682 lb |
| Latex paint | 1.25 | 1,320 lb | 2,879 lb | 3,595 lb | 6,004 lb |
| Liquid fertiliser 28-0-0 | 1.28 | 1,350 lb | 2,945 lb | 3,678 lb | 6,142 lb |
| Corn syrup 42 DE | 1.38 | 1,450 lb | 3,166 lb | 3,956 lb | 6,603 lb |
| Molasses | 1.42 | 1,490 lb | 3,254 lb | 4,067 lb | 6,787 lb |
| Sulphuric acid 93% | 1.84 | 1,910 lb | 4,180 lb | 5,230 lb | 8,723 lb |
Tares assumed: 78, 125, 143 and 265 lb respectively. Note that a 550 gallon unit of sulphuric acid at 8,723 lb exceeds most forklifts in a small plant and imposes 421 lb per square foot — and is also a compatibility question before it is a weight question.
Forklift capacity, properly derated
A forklift's rated capacity applies at a stated load centre, almost always 24 inches from the fork face. An IBC is 40 inches deep (48 on oversize), so its mass centre sits further out and the truck derates.
| Format | Water | SG 1.2 | SG 1.4 | SG 1.84 |
|---|---|---|---|---|
| 120 gal | 3,000 lb | 3,000 lb | 3,000 lb | 3,000 lb |
| 275 gal | 5,000 lb | 5,000 lb | 5,000 lb + margin | 6,000 lb |
| 330 gal | 5,000 lb | 5,000 lb + margin | 6,000 lb | 8,000 lb |
| 550 gal | 6,000 lb | 8,000 lb | 8,000 lb | 10,000 lb |
| Stainless 550 gal | 8,000 lb | 8,000 lb | 10,000 lb | 10,000 lb |
- Verify the nameplate at your load centre, not the headline figure. A 5,000 lb truck is 5,000 lb at 24 inches.
- Check fork spread against the base pockets. Oversize bases are wider apart and standard 42-inch forks may not engage both.
- Fork length matters. 42-inch forks on a 40-inch deep tote leaves little margin; 48-inch forks are safer.
- Pallet jacks: smooth level concrete only, long-fork jack, slowly. Never on asphalt, gravel, a ramp or a dock plate. A 2,330 lb load on four small wheels with a high centre of mass is genuinely dangerous the moment the surface stops being flat.
- Never lift a filled tote by the cage top rail. The frame is designed to carry a load above it in compression, not to be suspended from.
Floor loading, with the comparison
| Configuration | lb / sq ft | Acceptable on |
|---|---|---|
| 275 gal water, single | ≈175 | Industrial slab, heavy mezzanine |
| 275 gal water, two high | ≈350 | Industrial slab only |
| 275 gal SG 1.4, two high | ≈476 | Heavy industrial slab; verify |
| 330 gal water, single | ≈218 | Industrial slab, heavy mezzanine |
| 330 gal water, two high | ≈436 | Industrial slab only |
| 550 gal water, single | ≈235 | Industrial slab |
| 550 gal SG 1.4, single | ≈318 | Industrial slab; verify |
| Stainless 550 gal water, single | ≈260 | Industrial slab |
| Floor type | Typical rating |
|---|---|
| Heavy industrial ground-floor slab | 400 – 500 lb/sq ft |
| Industrial ground-floor slab | 250 – 400 lb/sq ft |
| Light commercial slab | 125 – 250 lb/sq ft |
| Steel mezzanine, heavy duty | 250 – 400 lb/sq ft |
| Steel mezzanine, standard | 125 – 250 lb/sq ft |
| Older timber upper floor | as low as 75 lb/sq ft |
| Suspended concrete office floor | 50 – 100 lb/sq ft |
Two complications the ratings do not cover
Point loading. A floor rating is usually a uniformly distributed load. An IBC bears through the pallet, and on a steel or composite base that is through a limited number of contact points. On a mezzanine deck the binding question is often point capacity between joists rather than the overall rating.
Dynamic load. Moving a filled tote across a mezzanine with a pallet jack imposes more than its static weight and concentrates it on four small wheels. A floor that holds a tote standing still may not like one being wheeled across it.
Racking
- Beam capacity needed, 275 gal water
- 2,330 lb per position, plus your safety factor
- Beam capacity needed, 275 gal SG 1.4
- 3,250 lb per position
- Beam spacing needed, 275 gal
- 47 in plus clearance
- Beam spacing needed, 330 gal
- 54 in plus clearance
- Configuration
- Single-deep, single-tier per beam level is normal
- Not permitted
- Stacking units within a beam level
- Decking
- Wire mesh or solid deck — never bar-only on a point-loaded base
What actually happens when one fails
275 gallons leaves a split bottle in well under a minute. On a flat floor it spreads to a radius of roughly twenty feet, goes under racking and machinery, and finds every drain. If it is anything other than water, you now have a reportable release and a cleanup, and the cost of both dwarfs every decision on this page.
On a mezzanine it does all of that and then goes over the edge.
The failure mode, specifically
It is almost never a bottle bursting. It is a lower cage horizontal that was bent by a forklift, loaded with 2,400 lb above it, buckling at the weld — and the upper unit then drops four inches, lands off-square and splits at the bottle corner.
Which is why never stack onto a damaged cage is the most load-bearing rule in our safety guidance, and why the $70 difference between technical and Grade A is the cheapest insurance available for anything you cannot afford to lose.
Detailed questions
How much does a full IBC tote weigh?
Multiply gallons by 8.345 by the product's specific gravity, then add the tare. A 275 gallon tote of water is about 2,330 lb; the same tote of corn syrup at SG 1.38 is about 3,166 lb. People consistently underestimate the second figure.
What specific gravity should I assume if I do not know?
1.2 for general safety, 1.4 if you are designing a rack or specifying a lift. Water is 1.0, diesel 0.85, vegetable oil 0.92, glycol 1.04, brine 1.18, latex paint 1.25, corn syrup 1.38, sulphuric acid 1.84.
Can my 5,000 lb forklift handle a full tote?
A 275 gallon unit of water at 2,330 lb, comfortably. A 330 of corn syrup at 3,956 lb, not with margin. A 550 of water at 4,855 lb, no — the load centre is worse and you are at 97% of nameplate. Check the plate at your actual load centre rather than the headline number.
How high can I stack them?
Empty, four high with cages interlocked on a level floor. Filled, two high on level concrete only with both cages square. In a moving trailer, filled units are single tier always. The cage is designed to carry one filled unit above it in static storage — that is the design limit, not a conservative guideline.
What is the legal truck payload?
About 43,500 lb for a typical 53-foot dry van on US interstate highways, after tractor and trailer weight come off the 80,000 lb gross limit. That is 18 filled 275 gallon water totes, or 13 of corn syrup. Empties are cube-bound instead: 48 units at 6,000 lb.
Do I need secondary containment?
Depends entirely on what is in it and where you are. A rough national pattern: a single container needs a pan rated to at least the container volume, and a bunded area for several needs 10% of aggregate volume or 100% of the largest container, whichever is greater. Your state, local fire code and insurer may all be stricter — check rather than assume.
Can I put a filled tote on a trailer tail-lift?
Check the lift's rating and its load-centre derating, which is usually severe. A 2,330 lb load at the outer edge of a tail-lift platform is a different proposition from 2,330 lb at its centre. Most liftgates on LTL trucks are rated 2,500 to 3,500 lb and are intended for empties, not filled units.
What is the heaviest thing you would put in a poly IBC?
By density, sulphuric acid at SG 1.84 is handled routinely — the weight is manageable and the compatibility is acceptable at the right concentration. By practicality, anything over SG 1.5 is worth a conversation about whether the floor, the lift and the rack all agree, because the arithmetic gets unforgiving fast.
Specifying a rack or a mezzanine?
Tell us the product and the stack height. We will send the loaded figures in writing so your engineer has a document.