Choosing the right big bag defines the loading speed, process cleanliness, and product safety during transport. Fortemo offers four configurations—open top, duffle top, fill spout, and double spout—designed for different scenarios: from construction debris to automated cement packaging. This comparison helps you decide which fits your operation in less than a minute.
🎯 Choose in 10 seconds
- If you load aggregates, debris, or bulky material with a shovel or wide hopper: go to Open Top Big Bag
- If you work outdoors and need to close the bag against rain/dust: go to Big Bag with Duffle Top
- If you pack cement, grains, or powders with an automatic hopper or nozzle: go to Big Bag with Fill Spout
- If you dispense product from the bag into a mixer or process line: go to Double Spout Big Bag
What to consider before choosing
Before choosing a big bag, evaluate these four criteria. They define whether the bag fills quickly, protects its contents, and withstands intensive handling with a crane or forklift.
- Type of material to be packed: bulky or irregular products (debris, aggregates, biomass) require an open top. Fine powders and grains require a fill spout to prevent dispersion and loss.
- Environmental conditions: if the filled bag will remain exposed to rain or dust, opt for a duffle top (tie closure) or an inner liner. For indoor storage, an open top is faster.
- Discharge method: if the bag is cut when emptying, an open top or duffle top is sufficient. If it is reused in a closed circuit or dispensed into a hopper, it needs a bottom discharge spout.
- Maximum working load: all Fortemo models are rated for 1500 kg with a 5:1 safety factor, covering dense aggregates, wet debris, and common granular materials.
Open top big bag with flat bottom: the universal choice for aggregates and debris
- Full opening for unrestricted filling
- Flat bottom keeps the bag upright during filling
- 1500 kg payload with 5:1 safety factor
- Virgin woven polypropylene with reinforced industrial seams
- No top closure: does not protect contents from rain or dust
- No liner: not suitable for fine powders or moisture-sensitive products
Standard dimensions 90×90×100 cm (3×3×3.3 ft) without liner, in packs of 30 units. Works equally well with demolition debris, aggregates for civil works, bulk grains, and agricultural biomass. Flat bottom fits on 1.0×1.2 m pallets and allows for organized stacking in warehouses or trucks.
Big bag with duffle top and flat bottom: weather protection
- Wide opening for filling like an open top
- Duffle top that closes by tying at the end
- UV treatment to resist Caribbean sun
- Industrial double stitching at body-duffle top joint
- Less hermetic seal than an inner liner
- Filling is a step slower than a fully open top
Dimensions 90×90×100 cm (3×3×3.3 ft) without liner, pack of 30 units. The duffle top unfolds upwards during filling and is tied at the end, sealing the bag against unexpected rain and environmental dust. Ideal for agricultural storage in yards or recycling heterogeneous materials where the filled bag remains exposed for several days.
Big bag with fill spout and flat bottom: for fine powders and grains
- Fill spout compatible with automatic hoppers and nozzles
- Integrated inner liner: barrier against moisture and cross-contamination
- UV-treated virgin polypropylene with reinforced seams
- Stable stacking on pallets with flat bottom
- Slower filling than open top for bulky materials
- No bottom discharge: bag is cut when emptying
Dimensions 90×90×100 cm (3×3×3.3 ft) with liner, pack of 30 units. The fill spout fits with automated plant packaging systems: grey and white cement, dry mortar, plaster, granulated fertilizers, and flours. The inner liner blocks environmental moisture and cross-contamination between batches.
Big bag with fill and discharge spout: for closed process circuits
- Double spout: top fill and controlled bottom discharge
- Insulating inner liner for packaged product
- Reusable in closed cycles without cutting the bag
- Industrial seams on both spouts and stress points
- Higher unit cost than single-closure models
- Discharge operation requires proper connection to hopper
Dimensions 90×90×100 cm (3×3×3.3 ft) with liner, pack of 30 units. The bottom spout allows the bag to be emptied directly into hoppers and mixers without opening it, maintaining traceability and reducing fine particle dispersion. Designed for plants that pack and empty the same bag in a closed production circuit: cement, mortar, granulated fertilizers, polymer pellets, and chemical raw materials.
Comparison table
| Feature | Open Top | Duffle Top | Fill Spout | Double Spout |
|---|---|---|---|---|
| Ideal Use | Aggregates and debris | Outdoor storage | Powders and grains | Closed processes |
| Loading System | Completely open top | Tie-down duffle top | Top fill spout | Top fill spout |
| Discharge System | By cutting the bag | By cutting the bag | By cutting the bag | Dosed bottom spout |
| Inner Liner | No liner | No liner | With liner | With liner |
| Max Working Load | 1500 kg (3300 lb) | 1500 kg (3300 lb) | 1500 kg (3300 lb) | 1500 kg (3300 lb) |
| Safety Factor | 5:1 | 5:1 | 5:1 | 5:1 |
| Dimensions | 90×90×100 cm | 90×90×100 cm | 90×90×100 cm | 90×90×100 cm |
| UV Treatment | Standard | Yes – outdoor suitable | Yes – outdoor suitable | Yes – outdoor suitable |
| Reusable | No | No | No | Yes – discharge without cutting |
| Packaging | Pack of 30 | Pack of 30 | Pack of 30 | Pack of 30 |
Use case → recommended product matrix
| If your case is... | Recommended product |
|---|---|
| Collecting debris from remodeling or demolition | → Open top |
| Storing aggregates in an agricultural yard with risk of rain | → Duffle top |
| Bagging cement or plaster from a plant hopper | → Fill spout |
| Dosing granular fertilizer to a mixing line | → Double spout |
| Stockpiling gravel or sand for civil works | → Open top |
| Bagging flours or animal feed | → Fill spout |
| Temporary outdoor biomass storage | → Duffle top |
| Reusing the same bag in a closed process circuit | → Double spout |
Before buying the big bag, check three pieces of information in your operation: the actual weight of the densest load you will handle (1500 kg is the maximum working load, not the ideal continuous load), the available height under the hook of your crane or forklift (a 90×90×100 cm loaded bag exceeds 1.20 m with extended loops), and the type of material—if it is fine powder or a moisture-sensitive product, the model with a liner is mandatory even if the loading format is open top.
Do not reuse a single-trip big bag for a second structural load. FIBCs are designed with a safety factor calculated for one cycle: after the first use, the fabric and loop seams lose load-bearing capacity in a non-visible way. Reusing it with 1500 kg can cause catastrophic failures during lifting, posing a serious risk to the operator.
Not sure what type of big bag you need?
If you are not sure whether your material requires a liner, spout, or duffle top, ask the virtual assistant with the details of your product, weight per bag, and method of packing/emptying. You will receive a technical recommendation instantly.
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Frequently asked questions
Can I use a big bag with a fill spout to pack debris?
It's not recommended. The fill spout is sized for fine particle or granular products that can pass through the nozzle. Debris (rubble, glass, broken bricks) will clog the spout and damage the connection area. For debris, use the open top model, which has a full opening and can withstand irregular material.
What is the difference between 'without liner' and 'with liner'?
The liner is an internal plastic bag that acts as a barrier between the contents and the outer polypropylene fabric. It blocks environmental moisture, dust, and cross-contamination. Fine powders, food products, and sensitive materials require a liner. For aggregates, debris, and biomass, a bag without a liner is sufficient.
What does a 5:1 safety factor mean?
It is the ratio between the breaking strength of the bag and the declared maximum working load. An FIBC with a 5:1 factor and a 1500 kg useful load is designed to break at a load 5 times greater, i.e., around 7500 kg. This is the usual technical standard for single-trip bags.