Ko ngā pūtu āhua-U he wāhanga kore-paerewa e whakamahia ana hei whakapiri i ngā ngongo pērā i ngā paipa wai, i ngā puna rau rānei pērā i ngā puna rau motuka. Nā tōna āhua āhua-U, ka taea te whakakotahi me ngā nati, nō reira e mōhiotia ana hoki ko ngā pūtu āhua-U, ko ngā pūtu eke rānei.
Ko ngā āhua matua o ngā pūtu āhua-U ko te haurua porowhita, te koki matau tapawhā, te tapatoru, te tapatoru whakarara me ērā atu. Ka taea te whiriwhiri i ngā pūtu āhua-U me ngā āhuatanga rauemi rerekē, te roa, te whānui me ngā tohu kaha rerekē, kia rite ki ngā taiao whakamahinga me ngā whakaritenga rerekē.
He whānuitia ana whakamahinga, e whakamahia ana i roto i te hanganga me te tāutanga, te hononga wāhanga miihini, ngā waka me ngā kaipuke, ngā piriti, ngā kauhanga, ngā rēriwe me ētahi atu mara. I runga i ngā taraka, ka whakamahia ngā pūtu-U hei whakau i te papa me te anga o te motuka. Hei tauira, ka honoa te puna rau e ngā pūtu āhua-U.
Kōwhiringa tohu pūtu.
E rua ngā momo o ngā pūtu: ngā pūtu kaha teitei me ngā pūtu noa. I te wā e whiriwhiri ana i te momo pūtu, me whai whakaaro ki te taiao tono, ki ngā āhuatanga kaha, ki ngā rauemi mata me ērā atu.
1. Mai i te tirohanga o ngā rauemi mata: ko ngā pūtu kaha-teitei he mea hanga ki ngā rauemi kaha-teitei, pērā i te maitai 45 #, te maitai boron 40, te maitai boron titanium 20 manganese. Ko ngā pūtu noa he mea hanga ki te maitai Q235.
e rua.. Mō te kaha, ko ngā pūtu kaha teitei e whakamahia whānuitia ana ko te 8.8s me te 10.9s, ā, ko te 10.9S te mea e whakamahia whānuitia ana. Ko ngā kaha o ngā pūtu noa ko te 4.4, 4.8, 5.6 me te 8.8.
3. Mai i te tirohanga o ngā āhuatanga ā-pūkaha: ka whakamahia e ngā pūtu kaha-teitei te kume-mua, ā, ka tukuna te kaha o waho mā te waku. I tētahi atu taha, ko te hononga pūtu noa e whakawhirinaki ana ki te ātete kutikuti o te tokotoko pūtu me te pēhanga i runga i te pakitara kōhao hei whakawhiti i te kaha kutikuti, ā, he tino iti te kume-mua i te wā e whakakīia ana te nati. Nō reira, me whai whakaaro ki ngā āhuatanga ā-pūkaha i roto i te tono.
4. Mai i te tirohanga whakamahinga: ko te hononga pūtu o ngā wāhanga matua o te hanganga whare ka honoa mā te whakamahi i ngā pūtu kaha-teitei. Ka taea te whakamahi anō i ngā pūtu noa, engari kāore e taea te whakamahi anō i ngā pūtu kaha-teitei, ā, ka whakamahia whānuitia mō te hononga pumau.
I roto i te poto, i te wā e whiriwhiri ana i te whakatakotoranga me te tohu pūtu o te pūtu āhua-U, me whakaaro tātou ki ngā āhuatanga rauemi, te tohu kaha me te ahotea o te pūtu kia rite ki te tono me te taiao whakamahinga tuturu, ā, me whiriwhiri te hua e tika ana hei whakatutuki i te hua o te haumaru, te pumau me te pono.