I-Portal scaffold yenye yezona scaffolds ezisetyenziswa kakhulu kulwakhiwo.Ngenxa yokuba isakhelo esiphambili sikwimo "yomnyango", ibizwa ngokuba yi-portal okanye i-portal scaffold, eyaziwa ngokuba yi-Eagle frame okanye i-gantry.Olu hlobo lwe-scaffold luqulunqwe ikakhulu ngesakhelo esiphambili, isakhelo esinqamlezayo, ibrace ye-diagonal enqamlezayo, ibhodi yesikafula, isiseko esilungelelanisiweyo, njl.

I-Portal scaffold yenye yezona scaffolds ezisetyenziswa kakhulu kulwakhiwo.Ngenxa yokuba isakhelo esiphambili sikwimo "yomnyango", ibizwa ngokuba yi-portal okanye i-portal scaffold, eyaziwa ngokuba yi-Eagle frame okanye i-gantry.Olu hlobo lwe-scaffold luqulunqwe ikakhulu ngesakhelo esiphambili, isakhelo esinqamlezileyo, isikhonkwane se-diagonal esinqamlezayo, ibhodi yesikafula, isiseko esihlengahlengiswayo, njl. njl. Isikafula sePortal sisixhobo sokwakha esaphuhliswa okokuqala yi-United States ngasekupheleni kweminyaka yoo-1950.Ngenxa yokuba ineenzuzo zokuhlanganisana okulula kunye nokuchithwa, ukunyakaza okufanelekileyo, amandla okuthwala kakuhle, ukusetyenziswa okukhuselekileyo nokuthembekileyo kunye neenzuzo ezilungileyo zezoqoqosho, ziye zaphuhliswa ngokukhawuleza.Ngeminyaka yoo-1960, iYurophu, iJapan kunye namanye amazwe baye bazisa ngokulandelelana kwaye baphuhlisa olu hlobo lwesikafula.EYurophu, eJapan nakwamanye amazwe, ukusetyenziswa kwe-scaffold ye-portal yeyona inkulu, ibalwa malunga ne-50% yazo zonke iintlobo ze-scaffolds, kwaye iinkampani ezininzi zeengcali ezivelisa i-portal scaffolds zeenkqubo ezahlukeneyo ziye zasekwa kumazwe ahlukeneyo.

Ukusukela ngeminyaka yoo-1970, iChina iye yazisa ngokulandelelana inkqubo ye-portal scaffold evela eJapan, eUnited States, eBritani nakwamanye amazwe, esetyenziswe ekwakhiweni kwezinye izakhiwo eziphakamileyo kwaye yafumana iziphumo ezilungileyo.Ayinakusetyenziswa kuphela njenge-scaffolds yangaphakathi nangaphandle yokwakhiwa kwesakhiwo, kodwa kunye ne-floor slab, inkxaso ye-beam formwork kunye ne-scaffold ehambayo.Inemisebenzi emininzi, ngoko ikwabizwa ngokuba yi-multi-functional scaffold.

Ekuqaleni kweminyaka yee-1980, abanye basekhaya kunye nabavelisi baqala ukuxelisa i-scaffold portal.Ukuza kuthi ga ngo-1985, abavelisi be-portal scaffold abali-10 baye basekwa ngokulandelelanayo.I-scaffold ye-portal iye yaziwa ngokubanzi kwaye yasetyenziswa kwiiprojekthi zokwakha kwezinye iindawo, kwaye yamkelwe ngamacandelo okwakha e-Guangda.Nangona kunjalo, ngenxa yeenkcazo ezahlukeneyo zemveliso kunye nemigangatho yomgangatho wefektri nganye, kuzisa ubunzima bokusebenzisa kunye nolawulo lweyunithi yokwakha.Oku kuchaphazele kakhulu ukukhuthazwa kobu buchwepheshe butsha.

Ngeminyaka yee-1990, olu hlobo lwesikafula lwalungekaphuhliswa kwaye lwaluncipha ngokusetyenziswa ekwakheni.Iifektri ezininzi ze-gantry scaffold zavalwa okanye zatshintshelwa kwimveliso, kwaye zimbalwa kuphela iiyunithi ezinomgangatho olungileyo wokuqhubekeka ziqhubekile nokuvelisa.Ngoko ke, kuyimfuneko ukuphuhlisa uhlobo olutsha lwe-portal tripod ngokudibanisa neempawu zakhiwo zelizwe lethu.