I-Portal scaffold yenye yezona scaffold zisetyenziswa kakhulu ekwakhiweni. Ngenxa yokuba ifreyimu ephambili ikwimo "yocango", ibizwa ngokuba yi-portal okanye i-portal scaffold, ekwaziwa ngokuba yi-Eagle frame okanye i-gantry. Olu hlobo lwe-scaffold lwenziwe ikakhulu yi-main frame, i-cross frame, i-cross diagonal brace, ibhodi ye-scaffold, isiseko esilungisekayo, njl.njl.

I-Portal scaffold yenye yezona scaffold zisetyenziswa kakhulu ekwakheni. Ngenxa yokuba isakhelo esiphambili sikwimo "yocango", sibizwa ngokuba yi-portal okanye i-portal scaffold, ekwaziwa ngokuba yi-Eagle frame okanye i-gantry. Olu hlobo lwe-scaffold lwenziwe ikakhulu yi-main frame, i-cross frame, i-cross diagonal brace, i-scaffold board, i-adjustable base, njl. I-Portal scaffold sisixhobo sokwakha esaqalwa ukuphuhliswa yi-United States ngasekupheleni kweminyaka yoo-1950. Ngenxa yokuba ineenzuzo zokuhlanganisa nokuqhaqha ngokulula, ukuhamba okulula, amandla okuthwala alungileyo, ukusetyenziswa okukhuselekileyo nokuthembekileyo kunye neenzuzo ezilungileyo zoqoqosho, iphuhlisiwe ngokukhawuleza. Ngeminyaka yoo-1960, iYurophu, iJapan kunye namanye amazwe aqalise kwaye aphuhlise olu hlobo lwe-scaffold ngokulandelelana. EYurophu, eJapan nakwamanye amazwe, ukusetyenziswa kwe-portal scaffold yeyona inkulu, ebalelwa malunga ne-50% yazo zonke iintlobo ze-scaffold, kwaye iinkampani ezininzi zobungcali ezivelisa ii-portal scaffold zeenkqubo ezahlukeneyo zisekwe kumazwe ahlukeneyo.

Ukususela ngeminyaka yoo-1970, iTshayina iqalise ngokulandelelana inkqubo ye-portal scaffold evela eJapan, e-United States, eBritane nakwamanye amazwe, eye yasetyenziswa ekwakhiweni kwezinye izakhiwo eziphakamileyo kwaye yafumana iziphumo ezilungileyo. Ingasetyenziswa kungekuphela nje njenge-scaffold zangaphakathi nangaphandle zokwakha izakhiwo, kodwa ikwasetyenziswa njenge-floor slab, inkxaso ye-beam formwork kunye ne-mobile scaffold. Inemisebenzi emininzi, ngoko ikwabizwa ngokuba yi-multi-functional scaffold.

Ekuqaleni kweminyaka yoo-1980, abanye abavelisi basekhaya kunye nabavelisi baqala ukulinganisa i-portal scaffold. Ukuza kuthi ga ngo-1985, abavelisi be-portal scaffold abali-10 basekwe ngokulandelelana. I-portal scaffold iye yathandwa kakhulu kwaye yasetyenziswa kwiiprojekthi zokwakha kwezinye iindawo, kwaye yamkelwe ziiyunithi zokwakha zaseGuangda. Nangona kunjalo, ngenxa yeenkcukacha ezahlukeneyo zemveliso kunye nemigangatho yomgangatho wefektri nganye, izisa ubunzima ekusetyenzisweni nasekulawulweni kweyunithi yokwakha. Oku kuyichaphazele kakhulu ukukhuthazwa kobu buchwepheshe butsha.

Ngeminyaka yoo-1990, olu hlobo lwe-scaffold lwalungekaphuhliswa kwaye lwalungasetyenziswa kakhulu ekwakheni. Iifektri ezininzi ze-gantry scaffold zavalwa okanye zatshintshelwa kwimveliso, kwaye zimbalwa kuphela iiyunithi ezinomgangatho olungileyo wokucubungula eziqhubekekayo ukuvelisa. Ke ngoko, kuyimfuneko ukuphuhlisa uhlobo olutsha lwe-portal tripod kunye neempawu zokwakha zelizwe lethu.