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Heavy Duty Nylon Cargo Net Sling
Closed-bottom webbing net bag, 2 t – 30 t · high-strength polyester, nylon, UHMWPE or aramid · mesh, depth and leg length made to your drawing · CE and GS certified
A heavy duty nylon cargo net sling is a closed-bottom webbing net bag that lifts loose, awkward or heavy cargo in a single pick. High-strength webbing is woven into a lattice, the bottom is closed, and four webbing lifting legs run from the reinforced rim up to a master ring under the crane hook. Load the bag, take up the slack, and the mesh closes around the cargo — nothing has to be strapped piece by piece, and nothing falls out on the way.
Lift Sling Rigging Company weaves the band, stitches the bag and proof-tests every sling in Taizhou, Jiangsu. Rated capacity runs from 2 t to 30 t, band width from 50 mm to 150 mm, and mesh opening, bag depth, leg length and colour are made to your drawing. Every sling leaves the works with a capacity label and a material test report, backed by CE and GS certification.
- Fully customizable — safety ratio 5:1 / 6:1 / 7:1, bag opening and depth, leg length, mesh, colour and printed logo all set on the order.
- Premium high-strength materials — high-tenacity polyester as standard, with nylon, UHMWPE and aramid webbing on request.
- Wear, cut and high-temperature resistant — wide duplex band takes abrasion, and the band is rated for −40 °C to +100 °C in polyester.
- Soft, flexible and light — the bag lies against the load instead of biting into it, marks nothing, and folds into a fraction of its working size.
- Certified and tested — CE and GS certified, ISO 9001 works, and the breaking load of every sling checked on our own 1000 t test machine.
Why a closed-bottom net bag, not a flat net
A flat cargo net is an open lattice: the load sits on it and it is lifted from four corner eyes. A net sling closes underneath. The lattice continues across the bottom, a doubled rim carries the load into the four lifting legs, and the legs gather at a master ring, so the bag tightens around the cargo as the crane takes up the slack. That is what keeps rubble, scrap, bagged goods, firewood and drums inside the lift. If your loads hold their own shape, the flat nylon flat webbing net is the cheaper tool; if they do not, this page is the one.
The wide, flat band is also why the sling is safe on finished cargo. Webbing spreads the load across the full width of every band under the bag instead of concentrating it at a few contact points, so packaging, paint, plating and machined faces come through the lift unmarked — something wire rope and chain cannot promise. The same band is used in our webbing slings, so a net and a sling on the same lift match in elongation and colour coding.
What “heavy duty” means on this sling
Heavy duty has to be measurable, otherwise it is only a word on a label. On this sling it comes from six design decisions we take on every heavy-duty order, and each one can be quoted separately if you want to know what you are paying for.
| Design decision | Standard net | This heavy duty sling |
|---|---|---|
| Band width | 25 – 50 mm | 50 – 150 mm; the wider band spreads load and resists abrasion |
| Band layers | Single layer | Duplex or triplex — two or three layers woven and stitched as one band |
| Rim | Folded border | Doubled rim with a reinforced corner panel at every leg root |
| Bottom closure | Open or lightly closed | Reinforced closed bottom, the highest-stress part of a bag |
| Safety factor | 5:1 | 5:1, 6:1 or 7:1 as specified, webbing rated to the EN 1492-1 basis |
| Proof test | Sampled | Every sling breaking-load tested on our own 1000 t machine |
Where the load is long, or where the bag has to stay square in the wind, the same construction is built with six or eight legs and lifted from a lifting spreader beam instead of a single ring.
Technical parameters
The table below covers the standard heavy-duty range. Band width, layer count, mesh, bag depth, leg length and rated capacity are all made to order, so treat it as the starting point for a quotation rather than a fixed catalogue.
| Parameter | Specification |
|---|---|
| Product type | Closed-bottom cargo net sling (net bag) with four lifting legs |
| Band material | High-tenacity polyester (PET) standard; high-tenacity nylon (PA), UHMWPE or aramid on request |
| Band width | 50 mm / 75 mm / 100 mm / 150 mm |
| Band layer | Duplex (two layers) or triplex (three layers) for heavy duty |
| Band thickness | 2.5 mm – 6.0 mm depending on width and layer count |
| Mesh opening | 100 – 300 mm, square or diamond |
| Bag opening | 1.0 × 1.0 m to 4.0 × 4.0 m; made to drawing |
| Bag depth | 0.8 m – 2.0 m as standard; deeper bags to order |
| Bag form | Closed bottom (flat or round), open top or closable top |
| Rim | Doubled webbing rim with a reinforced corner panel at each leg root |
| Lifting legs | Four as standard; six or eight on request |
| Top fitting | Master ring or four eyes; thimble-lined eyes on request |
| Rated capacity | 2 t – 30 t; heavier bags built to order |
| Safety factor | 5:1 / 6:1 / 7:1 |
| Elongation | 7 % or less at working load (polyester band) |
| Edge protection | Optional PU sleeve or wear pad at the contact points |
| Colour | Orange (standard), blue, green, black or custom |
| Marking | WLL, bag size, mesh and own brand printed along the band, plus a sewn capacity label |
| Working temperature | −40 °C to +100 °C polyester; −40 °C to +80 °C nylon |
| Standard basis | Webbing rated to EN 1492-1 |
| Certification | CE / GS / JIS; ISO 9001; CNAS laboratory; DNV |
| Customisation | Safety ratio, size, leg length, colour, packing and logo all configurable |
| HS code | 630790 — lifting nets of textile materials |
Standard bag sizes and working load limits
A heavy duty nylon cargo net sling is quoted by its opening and its depth, not by a flat length and width. The opening is measured along the rim; the depth is measured from the rim to the bottom of the bag when it is empty and laid flat. The working load limit then follows from the band width, the layer count and the number of legs.
| Bag size (opening × depth) | Mesh opening | Band | Typical capacity | Typical use |
|---|---|---|---|---|
| 1.0 × 1.0 m | 100 mm | 50 mm duplex | 2 t – 3 t | Drums, machine parts, single pallets |
| 1.5 × 1.5 m | 100 mm | 50 mm duplex | 2 t – 5 t | Bagged material, boxed cargo, small block |
| 2.0 × 2.0 m | 100 – 150 mm | 75 mm duplex | 4 t – 8 t | Bulk bags, rubble, firewood |
| 2.5 × 2.5 m | 150 mm | 100 mm duplex | 6 t – 12 t | Scrap, stone, demolition debris |
| 3.0 × 3.0 m | 150 – 200 mm | 100 – 150 mm triplex | 10 t – 20 t | Heavy rubble, quarry and port work |
| 4.0 × 4.0 m | 200 mm | 150 mm triplex | 20 t – 30 t | Large loose cargo, barge and ship loading |
| Made to drawing | 100 – 300 mm | 50 – 150 mm | 2 t – 30 t+ | Truck bed, container, hold and hopper dimensions |
Custom openings, depths, mesh and leg lengths are made to drawing. For palletised loads that need a flat base, the crane pallet cargo net keeps the load square; for a bag with a hoisting rather than a carrying bottom, see the polyester lifting hoisting net.
Choosing the webbing fibre
The band is the load path. Every kilo the crane lifts passes through the webbing, so the fibre is the single most important line on the drawing — and the four fibres below are not interchangeable.
| Fibre | Strength for weight | Elongation at break | Heat | Chosen for |
|---|---|---|---|---|
| High-tenacity polyester (PET) | High — the lifting standard | Low, about 12 – 20 % | Up to +100 °C | The default band: best all-round strength, low stretch, good UV resistance |
| High-tenacity nylon (PA) | High; toughest of the four against abrasion | High, about 18 – 22 % | Up to +80 °C | Shock loads and irregular cargo where a little give is safer |
| UHMWPE (Dyneema type) | Highest of the four for its weight | Very low, about 3 – 4 % | Low melting point | Maximum capacity for minimum net weight where handling weight matters and cargo is not hot |
| Aramid (Kevlar type) | Very high | Very low | Best of the four | Hot cargo, and where heat rules out the other three |
Two practical notes. UHMWPE and aramid need a protective coating to survive UV and abrasion, so on outdoor duty we coat them; polyester and nylon are UV-stabilised and can be left bare. And the fibre sets the band, but the rated capacity comes from band width, layer count and number of legs together — which is why we quote from those four numbers rather than from the fibre alone.
Lifting configurations and bag forms
How the bag is closed and how it is picked up decide how well it holds the load. These are the four arrangements we build most often.
- Four-leg bag lift — the standard. The four legs meet at a master ring under the hook and the bag closes around the cargo as the slack comes out.
- Six or eight-leg basket. Extra legs for long or awkward loads, so the rim is supported at more points and the bag does not neck in the middle.
- Spreader beam lift. The legs go to a beam instead of a ring: the bag stays square, the load stays level and every leg carries a predictable share.
- Lashing or securing duty. Tensioned across a load rather than lifted from a ring — a different duty with a different rating, covered by the cargo securing net.
| Bag form | Description | Used when |
|---|---|---|
| Open-top bag | Mesh pocket with an open rim | The bag is loaded by hand, from a conveyor or by a grab; quickest to fill |
| Closable top | The rim can be gathered and lashed closed | Loose or light cargo that could lift out in wind, on a truck or at sea |
| Flat bottom | The bottom squares off to a flat base | Palletised or boxed loads that need a flat base to sit on |
| Round bottom | The bottom gathers to a point | Loose bulk, rubble, firewood, scrap |
| Reinforced bottom band | An extra band runs across the bottom closure | Any heavy load — always specified where capacity exceeds 5 t |
Where heavy duty net slings are used
| Industry | What the bag lifts | Why a closed-bottom bag suits it |
|---|---|---|
| Scrap and recycling | Loose metal, demolition debris, cable | Contains loose and sharp material that a flat net would shed |
| Construction and demolition | Rubble, block, bagged materials, formwork | Loaded by grab or by hand and lifted straight onto a truck |
| Quarry and aggregates | Stone, kerbs, aggregate in bulk bags | Triplex band and reinforced bottom take the abrasion |
| Ports and terminals | Bagged and palletised cargo, ship and barge loading | Fast single-point pick with the bag closing on the load |
| Agriculture and forestry | Firewood, feed, produce, tyres | Round bottom gathers loose material without strapping it |
| Steel and metal processing | Bundles, offcuts, machined parts | Soft webbing holds the load without marking or scratching it |
| Waste and environmental | Sorted waste, compost, recyclables | Washable, rust-free and light enough to handle by hand |
| Military and disaster relief | Palletised and loose relief cargo by crane or helicopter | Closed bottom contains loose cargo in transit and in wind |
On the same sites the bag is often paired with a vehicle lifting net for RoRo and breakbulk work, or with our nylon ropes where the load is lashed as well as lifted.
Customisation, marking and OEM
Most of the slings we ship are made to drawing rather than picked from a list, because the bag has to fit the skip, the truck bed or the container it works in.
- Bag opening and depth, mesh opening and leg length built to your drawing or to the dimensions of your container.
- Band width, layer count, fibre and colour selected for the cargo, not for what happens to be in stock.
- Working load limit, bag size and mesh printed along the band, with a sewn capacity label so the sling and the paperwork always match.
- Own brand, address, warning text or certificate number printed for OEM and distributor orders.
- Export packing — folded into a bag or a crate, with a set of six bags taking the space of one pallet.
Quality control and certification
Weaving the band ourselves is what makes a made-to-order bag practical: width, layer, fibre, colour, printing and mesh are all set inside our own plant, so the sling is built to the drawing instead of assembled from whatever band a supplier happens to stock.
- 40 years of lifting equipment manufacturing — founded in 1985 in Taizhou, Jiangsu, with more than 200 employees and one of China’s largest lifting sling and net production bases.
- Own weaving mill supplying the same looms used for our webbing slings and round slings.
- Own testing laboratory with CNAS accreditation, plus CE and DNV certification of the facilities.
- 1000 t horizontal test machine — the breaking load of every sling is tested and documented, and a material test report travels with the order.
- CE and GS certified lifting products, with JIS certification on export orders.
How to specify your sling
Nine numbers are enough for us to quote a heavy duty nylon cargo net sling correctly the first time. If you have a drawing of the truck bed, container, skip or hopper it has to fit, send that instead — we work from drawings regularly.
| Information we need | Why it matters |
|---|---|
| Load weight and how it is presented | Sets the rated capacity, the number of legs and the band that carries the load |
| Bag opening and depth | The bag must be larger than the load so the cargo sits in the pocket, not on the rim |
| Mesh opening | Holds the items in; sized from the smallest item in the load, not from the total weight |
| Band width, layer and fibre | Sets the strength and the wear life of every band |
| Bag form and bottom closure | Open or closable top, flat or round bottom, reinforced bottom band |
| Lifting legs | Four as standard, six or eight for long loads and spreader beam work |
| Crane, hook or spreader | Determines the master ring, shackle or thimble fitted at the top |
| Environment | UV, salt water, chemicals, abrasive or hot cargo; heat rules out UHMWPE |
| Documentation | Safety factor, CE / GS marking, test report, own-brand printing and export packing |
Frequently asked questions
What is the difference between a cargo net sling and a flat cargo net?
The bottom. A flat net is an open lattice that the load sits on and which is lifted from four corner eyes. A net sling has a closed bottom and webbing lifting legs that gather at a master ring, so the bag closes around the cargo as it is picked up. A bag contains loose material; a flat net suits loads that hold their own shape.
What can a 2.5 × 2.5 m bag carry?
Typically 6 t to 12 t in 100 mm duplex band with four legs, which covers most scrap, stone and demolition duty. The exact working load limit is confirmed on the drawing: capacity follows the band width, layer count and number of legs together, not the bag size alone.
Is the sling nylon or polyester?
Polyester is our standard band, because it gives the best balance of strength, low stretch and UV resistance. Nylon, UHMWPE and aramid are all available, and the fibre is always named on the drawing: high-tenacity nylon, high-strength polyester, UHMWPE or aramid. Tell us if you specifically need nylon — for shock loads it is the better choice.
Which mesh size do I need?
Size the mesh from the smallest item in the load, never from the total weight. A 100 mm opening holds bags, block and boxed goods; 150 mm to 200 mm suits scrap, rubble and demolition debris. Send us the smallest piece and we will size the mesh to it.
How is the capacity proved?
Slings are supplied at 5:1, 6:1 or 7:1 as specified, with the webbing rated to the EN 1492-1 basis. The breaking load of every sling is tested on our own 1000 t machine and a material test report travels with the order. Our products are CE and GS certified and the facilities hold CNAS, CE and DNV certification.
Will the sling damage my cargo?
No — that is the reason to use webbing rather than wire rope or chain. The band is soft, flexible and light, it lies against the load instead of biting into it, and the load is spread across the full width of every band under the cargo. Packaging, paint, plating and machined faces all survive a webbing lift.
Can you print our brand and supply in our colour?
Yes. Working load limit, bag size and mesh are printed as standard, and OEM orders can carry your own brand, address, warning text or certificate number. Orange is the standard high-visibility colour; blue, green, black and custom colours are available for fleet identification.
What do you need to quote, and how fast?
Send the load weight and how it is presented, the bag opening and depth, the mesh opening, the band width and fibre, the number of legs and the working environment — or a drawing of the container, skip or hopper. Our engineers confirm the construction, the rated capacity and the packing, and quote in one reply; lead time is confirmed with the quotation once the drawing and quantity are fixed.
Request a quotation
Tell us the load, the bag size and the environment, and we will come back with the construction and the rated capacity rather than a price list. For the wider range, start from the cargo lifting net range, the woven webbing cargo lifting net or the round-rope nylon cargo lifting net; to talk it through first, contact our engineers.
Lift Sling Rigging Company — Lifute Industrial Park, Taizhou City, Jiangsu Province, China
Tel: +86 523 8693 5818 | WhatsApp: +86 180 6600 2268 | E-mail: lift98@jslift.com