Te Iri Huarahi Kua Whakaputangia: Ngā Mōhiohio Haumārui mō ngā Kaipēhi

Te Whai i ngā Ture: Me pēhea te tukutuku huarahi kua whakaputangia e tutuki ana i ngā paerewa haumaru manuhiri ANSI me OSHA

Te Āritenga ki ANSI A1264.1: Kāore e Slip, Momo Taumaha, me ng Tumu Haumaru Tukutuku Weto

Kei te whai mātai te rākau huarahi kua whakaputangia ki ngā paerewa ANSI A1264.1 nā te mata parahiko kua huaina e te taru kua hoatu ki a ia tētahi arataki āhuarangi (COF) o 0.5, pea rānei ake, ānoa rānei i te wā e pā te wai, i te wā e pā te hinu ki ngā mata. Mō te kaha herehere, he nui ake te kaha o ēnei huarahi i ngā herehere mō Class 4 (ko reira te 1,000 poune herehere takotoranga), ā, ka tino tūhono anō hoki ki ngā paerewa Class 5 ki te 2,000 poune. Ka hua ai tēnei kia koi tonu mō ngā whakamahinga taipindurunga matotoru kua hiahiatia ai te haerenga haumaru ki runga i ngā wāhi taputapu. Kei raro i te 1 iniha (e 25.4 mm neke atu rānei) ngā wāhi whakauru kei waenganui i ngā pou, ka tutuki ai ngā rautaki haumaru ANSI mō ngā kōpae whakauru. Ka aukati tēnei hoahoa i ngā hinganga, engari ka taea anō hoki e te oneone, te wai, me ētahi atu paru te wehe atu ki raro.

Tuhuratanga OSHA 1910.22 & 1910.23: Te Pūmahara o te Mata, Ngā Tumuherehere o te Rāwekenga Wāhi, me te Rāwekenga Hinga

Wātea ana ngā kōtaha karaka i te whakamaru i te mata i ngā tauānga OSHA 1910.22(b), e tū ana ki ngā mea āhua e hinga ai pea ngā mata pāpaku, i te wa roa rānei. Kei raro i te rahinga 19.5 mm ngā wāhi takotoranga o te mēhina, nā reira e ū ana ki ngā here o OSHA 1910.23(c) kia kaua ngā waewae e pakaru. Ko te mea ka pai ai tēnei punaha ko te āhuatanga o te tūhono ki ngā papa totohu me ngā rākau tiaki, arā ko te tikanga e ū ai mātou ki OSHA 1910.28 mō te whakamaru i ngā tāwhai, kaua ko ngā wāhi māmā kei reira te wehe. Ko ngā tirohanga auau, tirohanga mā te karu hoki, me ngā whakamātautau aha hoki he wāhanga o te tautohekoheko i te wāhanga 1910.22(d)(1), kia noho tonu ngā mea katoa e ū ana ki ngā arataki haumaru.

Mahi Traction: Te Whakakahungitanga o te Mēhina Huarahi Galvanised i ngā Tikanga Mōrearea

Matakite o te Coefficient of Friction (COF): Ngā Rangi Karaka Karaihe vs. Ngā Kōwhiringa

Ko ngā ara e hangaia ana ki te rauropi kowhatu karaihe e tino pā ana ki ngā panonitanga SCOF mai i te 0.60 ki te 0.80, he mea nui ake i te paerewa haumarutanga a OSHA e 0.50 mō ngā mata ara. Ko te take o tēnei pā tinowari pai ko ngā tauira itiiti e hangaia ana ina ka wera te hiriwa i te karaihe wera. Ka whakanuia ēnei tauira i te maha o ngā wāhi pānga i waenganui i ngā paraka me te mata rauropi, e 40 ki te 60 ōrau atu i te hiriwa noa e kāore i te whakaritea. Ki te titiro ki ētahi atu kōwhiringa e kāore he takotoranga, e 0.30 ki te 0.45 ngā ine SCOF, arā ko te taraiwa e tinihia ana e ira mutunga rānei ira māmā noa.

Te Taraiwa Kua Whakamāoritia i te Takiwā: Mahi i raro i te hinu, wai, me te pouri

Ko ngā taiao whakahaere pūhara, mātai kai, me ngā whakapakanga matū e pai ana ki te marere haumarutanga ititi kua huaina. Ina tū aha te hinu ki runga, kei te mau tonu te ititi i te 85% o tana āhuatanga takotoranga takotoranga (SCOF) tuatahi. Āta hoki i te ua nui, kei te pānuitia SCOF i runga ake i te 0.55 e tino pai ana ina hāunga te nuinga o ngā mata e heke iho i raro i ngā rawa haumaru. Ko te hoahoa tepu me ngā waru kei waenganui i te 25 ki te 30 mm ka aukati i te wai e hui ana, ā, ka aukati hoki i te paru e hui, nō reira kāore ngā kaimahi e manaaki ana ki te tēnei, ki te tēnei rānei i ngā hinganga. I whakaatu hoki ngā tāwhai whakamātautau i ngā whakapakanga matū i ētahi mea mīharo. Kua kitea ko ngā whakapakanga i huri ki tēnei ititi kua iti ake ngā take tēnei ki te 72% tata nei i ngā mata katoa tuku iho. Coo? Nā te kākahu tarutaru e kore e hura i ngā kākahu polimer, kākahu rāpae rānei ana. Ko ēnei matarua e pakaru ana i te wā e noho ana ki te hinu, ki ngā matū rānei, ka iti ake te mōhio hei mata haumaru.

Manawaroa Kiri: Tiaki Haumātanga Roa Trātata mā te Manawa o te Hūtai Zinc

Raraunga ASTM A123/A153: Whakatauira Ora I roto i ngā Tōpito Mātā, Tāwharau, me ngā Tōpito Kaupapa Himikia

Ko te mātai huarahi kua whakaputangia e te taratara he mea nui ngā īngoa motuhake o te kirihou e āwhina ana i te rino i raro. Kei te kaha tonu te huarahi, kaua ko ngā pānga e mōhiotia ana mō te korikori i te wā e pā ana te tangata ki runga. E ai ki ngā paerewa pērā i te ASTM A123 me te A153, ko te takotoranga o te kirihou e whakaora ana i ngā pānga iti ake mā te hanga o ngā oksiri e kati ana i ngā karapoti iti i mua i te kōhurutia. I ngā tūhuratanga i ngā tikanga huritao, ka taea e tēnei huarahi te ora i te rohe pakanga pērā i ngā tata o te moana, ngā papa whenua ranei kei reira te nuinga o te paraihe me te sufurataraidioksida i te rangi, i te wā roa e 20 ki te 25 tau. I ngā wāhi iti ake te pānga i roto i te whenua, e ora ana i te wā e 50 tau. He aha te mea e pai ai te kirihou? E rua ngā rāwekenga e tuku ana. Tuatahi, e hangaia ana e ia ngā rāwekenga kaitiakitanga kākaririka ina pā ana ki te rangi; tuarua, e tiaki ana ia i ngā wāhanga rino i pāngia. Kua whakapumautia e ngā tūhura a-taiao tēnei mahi pai hoki ki ngā taiao anuanu hoki, ki te paraihe e pā ana tonu rānei, ki ngā wāhi e kai maroke ana ngā tātai i ērā atamira e kore nei e tiakina. Arā, ka mau tonu te pākiuru me te kaha o te huarahi i tōna wā ora katoa.

Hoahoa Haumaru Tuarangi: Te Whakakotahi i te Mātini Huarahi Galvanised me ngā Papa Wāwahi, Papa Ringaringa, me te Tiaki Tātā

Whakaurunga Pūtanga Mōhio: Ngā Pūnaha Tātā e whai rāwekanga ana ki OSHA me ngā Tikanga Tūmatanui Pai

Ko te mātini huarahi galvanised hei turanga mō ngā pūnaha haumaru tākarotia katoa e pai ana te mahi tahi me ngā papa wāwahi, ngā papa ringaringa, me ngā papa ringaringa e whakaaetia ana e OSHA. Ko te kaupapa matua o ngā papa wāwahi ko te aukati i ngā taputapu, i ngā matēria rānei e ngaro ana i ngā arawhata tikangia. Me āki ai ngā papa ringaringa i ngā hiko e 200 pauna pā ana ki raro, ki waho rānei e ai ki te tikanga OSHA 1910.23. Mō ngā papa ringaringa, me tohua noa iho ia ōkuhi kotahi ineti i te wāhi e mutu ai te mātini, mā te whakamahi i ngā taputapu e kinokino ana ki te parurenga kia pakari tonu te katoa i te wā.

Ngā tikanga pai mō te tiaki tātā:

• Teitei o ≥42 ineti ki runga ake i ngā rori huarahi
• Te whakatuu hiko o 200 pauna e pā ana i tetahi tātaitanga
• Ngā matawhānui kore-rito ki ngā mata katoa e pakari ana
• Ngā takotoranga ≤19 mm waenganui i ngā waeonga kia aukatia ai te pā ke

Kia tika te whakauru o ngā wāhanga ititi me ngā arai ka wehe i ērā wāhi hinga mōrearea ana, ā, ka pai ake te nui o te kākahu i te tīmatanga. He nui ngā vantex o te ititi kiri kaukau nā te mea e noho pūmau ana engari ka taea anō te whakarerekē mena e hiahiatia ana. Ka taea te hanga i ngā wāhanga haumaru ki runga ki te miihini, ki te totohu rānei kia kaua ai te mataara, nā te mea e mau tonu ana te karapoti. Ka mahia ngā tirohanga auau ia tau mō te maha o te kākahu, ā, ka tino ata tiakina e mātou ngā totohu kia tino pai ai. Kua āki ai ki ngā paerewa OSHA mō ngā mata o ngā paparinga me ngā herekore kaha e kitea ana i te wāhanga 1910.22. E mōhiotia ana e te nuinga o ngā whakawhanaketanga ko ēnei tikanga tiaki e tika ana mō te whakapau moni ina tirohia te haumaru o ngā kaimahi me te whakaiti i ngā hinganga utu nui ki muri.