Lift sling rigging company manufacture WLL 800T Polyester Round Slings,800000kg Heavy Duty Round Lifting Sling,WLL 800 Ton Industrial Grade Orange Endless Round Sling,800 Tonne Heavy Duty UHMWPE Endless Round Sling,WLL 800 Ton Heavy Duty Endless Round Lifting Slings.

WLL 800T Polyester Round Slings

A WLL 800T polyester round sling is rated 800,000 kg on a single vertical leg — a continuous loop of high-tenacity polyester yarn inside a heavy duty woven sleeve, with a minimum breaking load of 5,600,000 kg nan 7:1 and a 1,600,000 kg proof load applied to every body before it is marked.

Every mode-factor table stops at four legs. 800 tonnes is the size that makes you notice.

Four legs at 0–45° rate 1,680,000 kg, and that figure is the end of the published arithmetic — there is no factor for six legs, none for eight, and none for two hooks. Above it the capacity of a lift stops being something you look up and becomes something you engineer, with equalising gear and a plan you can sign. That is the subject of this page.

Where the Table Ends

The standard assembly factors are 1.4 for two legs, 2.1 for three or four, falling to 1.0 epi 1.5 between 45° and 60°. Nothing above four legs appears in them — not for six, not for eight, not for a pair of cranes. So for this sling the tabled ceiling is:

Two of the four labels are gone before the set has a rating at all — one to the angle, one to the fact that only three legs are assumed to share. The arithmetic behind that is worked through on the 700 t page; here it is the ceiling it produces that matters.

Above 1,680 Tonnes: Three Routes

A 2,000 t lift does not need a bigger sling. It needs a different arrangement, and there are only three that get used.

The Equalising Problem

Eight legs hung at 45° would sum to 4,525,000 kg if every leg carried its share. No standard lets you assume that, and the reason is physical: a soft sling carries load in proportion to its length and stiffness, so the shortest leg — or the one tightened first — takes more, and the rest follow as the slings extend.

Run the numbers on a 2,000 t module on six legs at 45°. If the six share perfectly, each carries 471,000 kg — 59% of an 800 t sling. That 41% margin looks generous until you notice what it is for: it absorbs unequal sharing of up to 1.7 times the nominal share. A set without equalising gear can exceed that on a rigid load, and then the plan is no longer conservative.

• Equalise mechanically — a spreader beam with matched lower attachment points, or an equalising sling, so the legs are held at a known geometry.
• Equal length, one drawing — every body in the set measured the same way and marked with the set number, so the geometry does not change between lifts.
• State the assumed share — the plan has to say what share each leg is credited with, and the gear has to enforce it. A capacity figure without that assumption behind it is a guess.

What 800 Tonnes Changes in the Body

The coil is plant, not equipment

Yon 800 t body ships coiled and is moved by crane or forklift at both ends of the journey. That is a booking, a pallet position and a storage plan — costed with the lift, not after it.

Its own weight starts to matter

At 800 t the mass of the sling itself is a handling problem as much as a rigging one, and it is the reason a second version exists: the same 800,000 kg rating in a UHMWPE (Dyneema) core, which is lighter for the same strength. Both are rated identically; one is easier to dress, carry and store.

Stretch is a rigging dimension

Polyester extends roughly 2–3% at working load: 500–750 mm on a 25 m body. On a six-leg lift that extension is also what lets the angle open as the load comes on, which changes the share each leg carries — the reason the plan is checked at working load, not at hand-tight.

The Sling on Its Own

Technical Specifications

Marking, Proof and Set Records

Each body is proof loaded to 1,600,000 kg and the figure recorded against its serial number before marking. What is not tested is the assembly: a six- or eight-leg set is not proof loaded as a set anywhere in the world, so the set rating rests on the drawing, the equalising gear and the plan. That is precisely why the paperwork matters more at 800 t than the label does.

In Service

• Read the whole loop, every lift. The core is hidden; cuts, glazing, hardening or core show-through anywhere on the loop retire the sling.
• Keep the set together. One leg replaced from a different batch changes the geometry of the set, so replacements are made to the same drawing and the same length convention.
• Wear pads at the choke. The sleeve is the wear layer, and at this size the choke point is where it goes first.
• Store coiled and dry, off the floor and out of sustained sunlight, with the drawing and proof record on the crate.

Applications

• Modules and skids above 1,500 t, carried on six or eight legs from an equalising beam
• Reactor shells, vessel sections and heavy fabrications that cannot be re-rigged mid-lift
• Steel plate and coil packs where a soft, non-marking bearing is required
• Long loads picked from two hooks, where the share between cranes has to be calculated
• Port, shipyard and heavy fabrication work where water and grit rule out a fibre that rots
• Any lift where the rigging weight itself is a handling constraint — the case for the UHMWPE core

Pwodwi ki gen rapò

• All round slings — the full range, soti nan 1 t upwards
• 700 tonne polyester round slings — the size below, and the arithmetic behind the factor
• 600 tonne polyester round slings — where the interface above the sling is checked
• 500 tonne polyester round slings — the common top-end four-leg size
• Endless round sling — the construction, without the tonnage
• Endless wire rope grommet — the steel equivalent for heat and sharp edges