Xa uqwalasela ukuqina kunye namandla ophahla lwakho, kufuneka ukwazi ukuba zeziphi izinto zokwakha zezona zisebenzayo. Njengenye yezona ndawo zibalulekileyo zesakhiwo, uphahla lubonelela ngenkxaso ebanzi. Ayikhuseli kuphela abahlali kwiimpembelelo zangaphandle, kodwa iphinda izinzise isakhelo sesakhiwo sonke. Ngoko ke, uyazi kakuhle yonke into ofuna ukuyazi malunga purlins zentsimbi xa ukhetha naluphi na uhlobo uphahla. Amandla okwakhiwa kwezi zinto zenza ukuba zifaneleke kuzo zonke iintlobo zephahla, ukusuka kuphahla lwamaphepha ukuya kwiphahla eliphantsi, kungakhathaliseki ukuba yintoni na.
Abaninimzi abaninzi kunye nabanini baye baphendukela kwii-purlin zentsimbi ukuze bahlangabezane neemfuno zabo zokuphahla, ngakumbi xa kuziwa kumandla kunye nokuqina. Kodwa ukuba eli lixesha lakho lokuqala ukudibana nee-runs, luluvo olulungileyo ukufunda iziseko kuqala ukuze ubone ukuba zikulungele na. Kwesi sikhokelo, uya kufunda ngakumbi malunga nokuba zeziphi purlins zentsimbi, iintlobo ezahlukeneyo, kunye nokunye.
Uya kufumana iimpawu ezininzi ezizodwa kwiindidi ezahlukeneyo ze-purlins, kubandakanywa umphezulu osicaba kunye neeshelufu okanye imilenze echasayo enika inkxaso kumacandelo ayisicaba. Kwi-C-purlins, i-bottom and top flanges ifana nobukhulu obufanayo kwaye inokuxhasa inani leengqungquthela okanye eziqhubekayo. Nangona kunjalo, ngenxa yobume kunye nokumila kwazo, i-purlins yeshaneli ayinakugqithwa enye kwenye.
I-purlins ene-Z, ngokuchaseneyo, ilungelelanise i-diagonally iishelufu ezibanzi kunye nezincinci. Oku kuvumela ukuhlangana kwe-overlap kwaye kungasetyenziselwa ukunyusa ubukhulu bee-purlins, umzekelo ukuba i-slab yephahla yenziwe ngezinto ezinobunzima okanye ukuba i-purlin enye ayikwazi ukuxhasa umthwalo wesilingi esinzima / i-slab yophahla.
Ezinye izicelo ezidumileyo zeepurlins zentsimbi ziquka iindawo zokugcina ezolimo, iindawo zokugcina iimpahla, izakhiwo zorhwebo, iindawo ezingenanto, iindawo zokupaka iimoto, kunye nezakhiwo zentsimbi ezenziwe ngaphambili.
I-purlins yensimbi engenasici idla ngokwenziwa ngentsimbi ekhandiweyo enamandla amakhulu kunye ne-ductility - i-G450, i-G500 okanye i-G550. Insimbi ene-galvanized inenzuzo ekhuphisanayo ngaphezu kwezinye iintlobo zentsimbi engasebenziyo ngenxa yokuba ayinakugqwala okanye i-oxidize. Oku kunokunciphisa kakhulu naziphi na iindleko ezinxulumene nokugcinwa kwephahla kunye nokulungiswa.
Ayisiyiyo loo nto kuphela, i-purlins inokuhlala ukuya kuthi ga kwiminyaka eyi-10 ukuba ifakwe ngokuchanekileyo. Oku kuyinyani ngokukodwa kwizakhiwo ezivaliweyo apho imisebenzi eyahlukeneyo inokuvelisa ukugijima-umswakama, iikhompawundi, ezinye izinyithi, njl.-ezinokuchaphazela umgangatho wokugijima. Naluphi na uhlobo lolwakhiwo, i-purlins yensimbi, ngokukodwa i-galvanized, ibonakalise ukuba iyona nto ilungileyo nakwiimeko ezinzima zokusingqongileyo.
Ixesha lokuposa: May-14-2023