Legeni yathyathyathya imachita zambiri osati kungonyamula katundu, koma imateteza. Malo otambalala, osalala amagawa kulemera kwa katundu pamalo okulirapo, kumachepetsa kwambiri kupanikizika pamalo aliwonse. Ili ndiye mfundo yofunikira yafizikiki kumbuyo kwa ma slings athyathyathya: Pressure = Force ÷ Area. Powonjezera malo olumikizirana, ma gulayeti athyathyathya amachepetsa chiwopsezo cha kuwonongeka kwa pamwamba, madontho, ndi kuphwanyidwa - kuzipangitsa kukhala chisankho chomwe chimakonda kukweza zida zolimba, zomalizidwa, kapena zowonongeka mosavuta. Bukhuli likufotokoza za fiziki ya kugawa kwamakasitomala, kufanizitsa ma gulayesi athyathyathya ndi njira zina zonyamulira, ndipo limapereka malangizo othandiza posankha m'lifupi mwake momwe mungagwiritsire ntchito gulaye.

Gola lathyathyathya lovotera matani 2 pokwera mowongoka limatha kunyamula tani imodzi yokhayo ikagwiritsidwa ntchito pamakona a 60°. Izi zili choncho chifukwa gulayeyo imakhudza kwambiri mwendo uliwonse wa gulayeyo—kang’ono kakang’ono pakati pa gulaye ndi yopingasa, m’pamenenso kumangikako kumakulirakulira. Malinga ndi EN 1492-1 ndi ASME B30.9, mphamvu iyenera kuchepetsedwa pamene gulaye imagwiritsidwa ntchito pa ngodya kapena masinthidwe amiyendo yambiri. Bukhuli likufotokoza za fiziki kumbuyo kwa ma angle factor, limapereka matebulo opangira ma slings osalala, komanso limapereka malangizo othandiza powerengera zolemetsa zogwira ntchito motetezeka pamachitidwe enieni adziko lapansi.

Gola lathyathyathya - lomwe limadziwikanso kuti gulaye kapena lamba - ndi imodzi mwa njira zonyamulira zomwe zimagwiritsidwa ntchito kwambiri pomanga, kupanga, ndi kukonza zinthu . Kupanga kwake kumatanthauzidwa ndi zinthu zitatu zofunika: ukonde, zigawo za ply, ndi m'lifupi. Pamodzi, izi zimatsimikizira malire a gulaye ntchito (WLL), kusinthasintha, ndi kulimba. TS EN 1492-1 slings zoluka zathyathyathya zopangidwa ndi poliyesitala, polyamide, kapena polypropylene zimayikidwa pachitetezo cha 7: 1 komanso zokhala ndi mitundu. Bukhuli likufotokoza momwe kamangidwe ka ukonde, masinthidwe a ply, ndi m'lifupi zimalumikizirana kuti mudziwe kuchuluka kwa katundu - komanso momwe mungasankhire gulaye yoyenera ya pulogalamu yanu yonyamulira.

Kudziwa nthawi yopuma pantchito yokweza gulaye ndi imodzi mwamaluso ofunikira kwambiri pakusungitsa chitetezo. Sling yomwe ikuwoneka yothandiza ikhoza kukhala ndi zowonongeka zobisika zomwe zimasokoneza mphamvu zake, pamene mitundu yowonongeka yowonekera-kudula, kuphulika, kutentha kwa mankhwala, kuwonongeka kwa kutentha, ndi kuwonongeka kwa UV-aliyense ali ndi ndondomeko yopuma pantchito yomwe imatanthauzidwa ndi ASME B30.9, OSHA, ndi EN 1492. Kwa oyang'anira kubera, akatswiri achitetezo, ndi ogwira ntchito, bukhuli limapereka chidziwitso chothandiza popanga zisankho zapanthawi yopuma pantchito.

Chovala chonyamulira chimatha kutaya mphamvu nthawi yayitali chisanawonekere - nthawi zambiri popanda chenjezo. Kutentha kwambiri, kuwala kwa ultraviolet (UV), ndi kukhudzana ndi mankhwala ndi zinthu zitatu zomwe zimakonda kwambiri zachilengedwe zomwe zimawononga ulusi wopangidwa. Malingana ndi Canadian Center for Occupational Health and Safety (CCOHS) , kuwala kwa dzuwa, chinyezi, ndi kutentha kwa pamwamba pa 90 ° C (194 ° F) kungathe kuwononga zonse za nayiloni ndi polyester. OSHA imanenanso kuti mphamvu za gulaye zimawonongeka chifukwa cha kuwala kwa dzuwa ndi kuwala kwa ultraviolet, ndipo imalimbikitsa kukaonana ndi wopanga kapena munthu woyenerera kuti apeze zofunika zina zopuma pantchito. Bukhuli likuwunika momwe chilengedwe chilichonse chimakhudzira kukhulupirika kwa gulaye, ndi zizindikiro zotani zomwe muyenera kuyang'ana, ndi momwe mungatetezere zonyamula zanu kuti zisawonongeke msanga.

Choponyera chonyamulira chokhala ndi chitetezo cha 7: 1 chimakhala ndi mphamvu yothyola kasanu ndi kawiri malire ake ovomerezeka. Izi zikutanthauza kuti gulaye yomwe idavotera tani imodzi iyenera kupirira matani 7 osalephera. Chitetezo cha 7: 1 chimalamulidwa ndi miyezo yayikulu yamakampani kuphatikiza EN 1492-1, EN 1492-2, ndi AS 4497:2018 pazitsulo zopangira. Nkhaniyi ikufotokoza kusiyana pakati pa chitetezo ndi malire olemetsa, chifukwa chake 7: 1 ndiye muyeso wama gulayeti opangira, momwe amafananira ndi zida zina, komanso chifukwa chake malire achitetezowa ndi ofunikira poteteza ogwira ntchito ndi katundu pazochitika zenizeni zonyamula katundu.