What it replaced, and why it won on finished work

A wire rope sling is stronger per millimetre of its own thickness and it survives abuse that would end a webbing sling’s life. So the swap is not a question of strength; it is a question of contact and handling. A steel rope presents a hard, narrow surface to the load and a fringe of broken wires to the hands that rig it, and on a finished article it does the damage before the lift begins. A maʻa pūnaewele presents a wide soft face to the load and a smooth one to the rigger, so it is chosen where the surface is worth more than the extra care a rope would need, and where the load is not so abrasive or so hot that the fibre is out of its depth.

Three things the name has to carry: laula, figure and ends

• Laulā — sets the pressure on the load. A narrow band concentrates the load and is the right answer on a light, stiff article; a wide band spreads it and is the right answer on anything soft, uhi ʻia a hoʻopau ʻia. It also sets what the band can be folded into.
• Kiʻi, per mode — a webbing sling does not have one capacity. It has a capacity in vertical, a different one in basket and a lower one choked, and the label states each of them. Purchasing on “the tonnage” alone is the single most common error in this category.
• Hoʻopau — flat loop, folded eye or reinforced eye; they decide how the band sits on a hook, whether it can be used in a choker, and how the last of the fibres at the end are protected. The end is where a band wears out first, so it is worth specifying deliberately rather than accepting by default.

One band, several figures: the arrangement decides the rating

ʻO nā kiʻi ma lalo nei nā kumu hana maʻamau i hoʻohana ʻia ma waena o ka mākeke no nā maʻa pūnaewele palahalaha: Hoʻonui ʻia kēlā me kēia me ka palena haʻahaʻa hana ponoʻī o ka maʻa e hāʻawi i ka hiki i kēlā hoʻonohonoho. ʻO ke kihi ka huina o ka wāwae i ka ʻaoʻao, and the label on the article always overrides the table.

Two consequences worth stating plainly. A choked webbing sling is weaker than the same sling used vertically, so a load that must be choked needs a bigger band rather than a longer one. And as the legs spread the capacity falls, which is a geometric fact rather than a material one — it is answered by a wider angle-free arrangement, by a spreader, or by a bigger sling, and by nothing else.

Colour on the band is identification, not certification

Flat webbing slings are colour-coded by working load limit under the convention most of the market uses — 1 t viole, 2 t omaomao, 3 t melemele, 4 t hina, 5 t ulaula, 6 t ʻeleʻele, 8 t uliuli, 10 t alani. It is genuinely useful on a site: a rigger can spot a two-tonne band in a pile from across the yard. What the colour cannot do is replace the label, because the figure that applies is the one printed and affixed to that individual sling, and above the top of the coded range there is no colour to read at all. Treat the colour as the fast check and the label as the answer.

Replacing a wire rope: where the swap works and where it does not

The practical rule is that a webbing sling is chosen for the sake of the load, not for the sake of the sling, and the environment the band works in is the price of that choice. Where both a finished surface and an abrasive environment are present, the answer is normally a covered or sleeved band rather than a return to wire rope — but that is a decision to take with the supplier on the specific job, not a default.

Hāpai ʻia, lashing and towing are three different duties

The same article is often bought for all three and should not be. They load the band differently and are rated differently, and the confusion is the reason this section exists.

Where a load has to be both lifted and held in transit, the correct answer is two articles rather than one used twice: a sling that lifts, a he a ratchet cargo lashing belt a i ʻole ratchet tie down strap that restrains. It costs less than the incident.

Nā kihi, sleeves and the protection that is part of the specification

Hoʻomaka ka pūʻali i ʻoki ʻia e ka ʻaoʻao ma ke ʻano he notch liʻiliʻi a hoʻopau ʻia me ka hemahema, so edge protection is a specification line rather than an accessory decision. Kahi oi ka haawe, he lehelehe mīkini, he burr, he weld spatter a i ʻole he ʻili hoʻoheheʻe ʻino, ʻo ka pūlima paha he ʻāpana o ka ʻatikala, or the corner is protected with a pad or a corner piece that travels with the band. E noi iā ia ma ke kahua nīnau: a sleeve added later cannot be retro-fitted to a band already woven, and a band ordered without one is a band that will be used without one.

Nānā, and the conditions that end a band’s life

E nānā ma mua o kēlā me kēia hoʻohana, and formally at the interval the site rules set. The conditions that remove a webbing sling from service are specific rather than a matter of judgement: acid or caustic burns, melting or charring, snags, punctures, tears or cuts, broken or worn stitching, distortion of the fittings or the eyes, and a label that can no longer be read. A band with any of those is out of service, and it is out of service because the damage is in the load path, not because it looks untidy. Store clean and dry, mai ka lā, and keep the record with the article.

Nīnau pinepine ʻia

Can a webbing sling really replace a wire rope of the same capacity? For the lift itself, ʻAe, provided the figure is taken per hitch and the edges and the temperature are within the band’s limits. The two are not interchangeable in the environment, which is a different question from the load.

What width should I order? The narrowest width that will carry the figure without crushing the load, or the widest the load’s geometry will accept. Send the load and the figure, and the width follows.

Why is the choked figure lower? No ka mea, ua hoʻouka ʻia ka pūʻali iā ia iho a paʻa ka ʻōwili, so the fibres are working in a way the vertical figure does not describe. He mea maʻamau, aia ma ka lepili, and it is the reason a choke sometimes needs the next size up.

Can I use one sling as a lashing as well? ʻAʻole like me ka ʻatikala like. Restraint is rated for continuous tension, not for a lift, and the two duties are marked differently. Buy the lashing as a lashing.

How long will a band last? Hoʻoholo ke kaiapuni, ʻaʻole ka kalena: a band on painted steel in a workshop gives years, the same band dragged over concrete and grit gives shifts. E nānā no ke kūlana ma mua o ka makahiki, and never against a fixed service life.

Does the colour tell me the capacity? It identifies the working load limit by convention, and it is not a substitute for the label. Where the colour and the label disagree, or the label is unreadable, the band is out of service.

Kahi e hele ai

Related categories and products: maʻa hāpai, maʻa kaula uea, lāʻau hāpai, hook hāpai, kaulahao hāpai. For the neighbouring articles see nylon woven flat sling, polypropylene flat sling, heavy duty lifting sling, endless webbing sling, eye and eye type webbing sling, alkali resistant sling, lightweight UHMWPE endless loop flat webbing sling, flame resistant aramid webbing sling belt a hoʻohana hoʻokahi maʻa webbing pau ʻole.

Hoʻopili

Lift Sling Rigging Co., Ltd - kelepona a me WeChat 18066002268, leka uila 702461526@qq.com, Pāka ʻOihana Lifute, Kulanakauhale o Taizhou, ʻĀpana ʻo Jiangsu, Kina. HS code 630790. Hoʻouna i ka ukana, ke kiʻi no kēlā me kēia hitch, the arrangement and the working environment, a e hōʻoia mākou i ka laulā, ka lōʻihi, ka pale a me ka hōʻailona ʻana ma mua o ka ulana ʻana o ka pahu.

ZH