Di 1/10 rul na wan stret bɔt impɔtant ritayayeshɔn krayteria fɔ flat sling: we abrasive wear ridyus di webbing width bay 1/10 ɔ mɔ, di sling fɔ kɔmɔt na savis. Dis rul de spɛsifa insay EN 1492-1 ɛn ASME B30.9 no am as di men indikɛtɔ fɔ wɛr pasmak. Dis gayd de ɛksplen wetin di 1/10 lɔ min, aw fɔ mɛzhɔ di wɛb wit kɔrɛkt wan, wetin mek dɛn pik dis trɛshɔld, ɛn aw fɔ yuz am we dɛn de du inspekshɔn ɛvride. Fɔ di wan dɛn we de oba di rig ɛn di wan dɛn we sabi bɔt sefty, if dɛn ɔndastand dis simpul lɔ, dat kin mek dɛn nɔ yuz sling dɛn we dɛn dɔn wɛr we denja.

Flat sling nɔ jɔs de es lod—i de protɛkt am. Di wayd, flat wɛb sɔfays de sheb di lod in wet oba wan big eria, we de ridyus di prɛshɔn bad bad wan na ɛni wan pɔynt. Dis na di fawndeshɔnal fizik prinsipul biɛn flat sling: Prɛshɔn = Fɔs ÷ Ɛria. We dɛn de mek di say we dɛn kin kɔntakt mɔ, dɛn kin mek di flat sling dɛn nɔ pwɛl di say we dɛn de, dɛn kin dent, ɛn krɔs—we kin mek dɛn lɛk fɔ es di tin dɛn we dilik, we dɔn dɔn, ɔ we kin pwɛl izi wan. Dis gayd de ɛksplen di fizik fɔ prɛshɔn distribyushɔn, kɔmpia flat sling to ɔda liftin sɔlvishɔn, ɛn gi prɛktikal gayd fɔ pik di rayt sling wit fɔ yu aplikeshɔn.

Flat sling we dɛn rayt fɔ 2 tan insay wan stret vertikal lift kin jɔs ebul fɔ lif 1 tan sef wan we dɛn yuz am na 60° angle. Dis na bikɔs di angul we di sling gɛt kin afɛkt di tɛnsiɔn we de na ɛni leg na di sling dairekt wan—di mɔ di angul bitwin di sling ɛn di ɔrizɔntal smɔl, na di mɔ di tɛnsiɔn go big. Akɔdin to EN 1492-1 ɛn ASME B30.9, kapasiti fɔ ridyus we dɛn de yuz sling na angle ɔ insay mɔlti-lɛg kɔnfigyushɔn. Dis gayd de ɛksplen di fizik biɛn angle factors, gi kapasiti tebul fɔ flat sling, ɛn gi prɛktikal gayd fɔ kɔlkul sef wok lod insay rial-wɔl riging ɔpreshɔn.

Wan liftin sling we dɛn dɔn kip wet kin tan lɛk se i nɔ pwɛl, bɔt wet kin mek mildew gro, fayv kin pwɛl, ɛn—insay di kes fɔ naylon sling—i kin lɔs trɛnk fɔ sɔm tɛm te to 15% we i wet, wit trɛnk kin kam bak we i dray . di mכr krichכ, naylon sling kin lכs 25% pan dεn trεnk we dεn wet biכs fכ di mכsichכ absכpshכn . Difrɛn frɔm dat, di poliɛsta sling dɛn nɔ kin afɛkt di mɔstɔ bɔt dɛn kin stil sɔfa wit mildew ɛn rɔtin if dɛn kip am wet wet. Dis gayd de egzamin di risk dɛm we gɛt fɔ du wit wet sling, di patikyula vulnerabiliti dɛm fɔ difrɛn sintetik matirial dɛm, ɛn di inspekshɔn ɛn drying prosidur dɛm we dɛn nid bifo dɛn ritɔn wet sling to savis.

Fɔ no ustɛm fɔ ritaia wan liftin sling na wan pan di impɔtant skil dɛn fɔ rigging sef. Wan sling we tan lɛk se dɛn kin yuz am kin gɛt damej we ayd we kin mek i nɔ gɛt trɛnk, pan ɔl we di kayn damej dɛn we pɔsin kin si—we dɛn kɔt, abrashɔn, we dɛn bɔn wit kemikal, we ɔt, ɛn we UV kin pwɛl—ɛvri wan gɛt patikyula ritayayeshɔn krayteria we ASME B30.9, OSHA, ɛn EN 1492 dɔn difayn.Di vijual gayd de ɛksplen aw fɔ no ɛni kayn damej, wetin fɔ luk fɔ we dɛn de inspɛkt am, ɛn di patikyula kɔndishɔn dɛn we nid fɔ pul am wantɛm wantɛm na di savis. Fɔ rigging supavaysa, sefty profeshɔnal, ɛn ɔpreshɔn, dis gayd de gi prɛktikal rɛfrɛns fɔ mek dɛn no bɔt ritayayeshɔn disizhɔn.

Sling we dɛn kin es kin lɔs in trɛnk lɔng bifo i sho se i dɔn west—bɔku tɛm, dɛn nɔ kin wɔn am. Di tɛmpracha we pasmak, ɔltra vayolɛt (UV) raytin, ɛn di kemikal we dɛn kin yuz na di tri tin dɛn we kin apin na di envayrɔmɛnt we kin pwɛl di sintetik fayv dɛn. Di Canadian Center for Occupational Health and Safety (CCOHS) , bin tɔk se di layt we di san de shayn, wet, ɛn we di ples wam pas 90°C (194°F) kin pwɛl di naylon ɛn poliɛsta sling dɛn . OSHA tɔk bak se sling trɛnk kin pwɛl we i de na di san ɛn ɔltra vayolɛt layt, ɛn i se yu fɔ aks di wan we mek am ɔ pɔsin we kwalifay fɔ gɛt ɔda tin dɛn we yu nid fɔ ritaia . Dis gayd de chɛk aw ɛni wan pan di tin dɛn we de apin na di envayrɔmɛnt de afɛkt di sling intɛgriti, us wɔnin sayn dɛn fɔ luk fɔ, ɛn aw fɔ protɛkt yu sling dɛn we yu de es ɔp fɔ mek dɛn nɔ pwɛl bifo tɛm.