I-scaffold ye-portal ingenye ye-scaffold ezisetshenziswa kakhulu ekwakhiweni. Ngenxa yokuthi uhlaka oluyinhloko lusesimweni "somnyango", lubizwa ngokuthi i-portal noma i-portal scaffold, eyaziwa nangokuthi uhlaka lwe-Eagle noma i-gantry. Lolu hlobo lwe-scaffold lwakhiwe kakhulu uhlaka oluyinhloko, uhlaka oluphambeneyo, i-cross diagonal brace, ibhodi le-scaffold, isisekelo esilungisekayo, njll.

I-portal scaffold ingenye yama-scaffold asetshenziswa kakhulu ekwakhiweni. Ngenxa yokuthi uhlaka oluyinhloko lusesimweni "somnyango", lubizwa ngokuthi i-portal noma i-portal scaffold, eyaziwa nangokuthi uhlaka lwe-Eagle noma i-gantry. Lolu hlobo lwe-scaffold luqukethe kakhulu uhlaka oluyinhloko, uhlaka oluphambeneyo, i-cross diagonal brace, ibhodi le-scaffold, isisekelo esilungisekayo, njll. I-portal scaffold iyithuluzi lokwakha elasungulwa okokuqala yi-United States ngasekupheleni kwawo-1950. Ngenxa yokuthi inezinzuzo zokuhlanganisa nokuqaqa okulula, ukunyakaza okulula, umthamo omuhle wokuthwala, ukusetshenziswa okuphephile nokuthembekile kanye nezinzuzo ezinhle zomnotho, ithuthuke ngokushesha. Ngawo-1960, iYurophu, iJapane namanye amazwe angenise futhi athuthukisa lolu hlobo lwe-scaffold ngokulandelana. EYurophu, eJapane nakwamanye amazwe, ukusetshenziswa kwe-portal scaffold yiyona enkulu kunazo zonke, ebiza cishe u-50% wazo zonke izinhlobo zama-scaffold, futhi izinkampani eziningi zobungcweti ezikhiqiza ama-portal scaffold ezinhlelo ezahlukene sezisungulwe emazweni ahlukahlukene.

Kusukela ngawo-1970, iShayina iye yaqala ukusebenzisa uhlelo lwe-portal scaffold oluvela eJapane, e-United States, eBrithani nakwamanye amazwe ngokulandelana, oluye lwasetshenziswa ekwakhiweni kwezinye izakhiwo eziphakeme futhi lwathola imiphumela emihle. Lungasetshenziswa hhayi nje kuphela njengezicaffold zangaphakathi nangaphandle zokwakha izakhiwo, kodwa futhi njenge-floor slab, ukwesekwa kwe-beam formwork kanye ne-mobile scaffold. Lunemisebenzi eminingi, ngakho-ke lubizwa nangokuthi izicaffold ezinemisebenzi eminingi.

Ngasekuqaleni kwawo-1980, abanye basekhaya kanye nabakhiqizi baqala ukulingisa i-portal scaffold. Kuze kube ngu-1985, abakhiqizi be-portal scaffold abayi-10 basungulwe ngokulandelana. I-portal scaffold ibilokhu ithandwa kakhulu futhi isetshenziswa kumaphrojekthi okwakha kwezinye izindawo, futhi yamukelwa amayunithi okwakha aseGuangda. Kodwa-ke, ngenxa yemininingwane ehlukene yomkhiqizo kanye nezindinganiso zekhwalithi zefektri ngayinye, kuletha ubunzima ekusetshenzisweni nasekuphathweni kweyunithi yokwakha. Lokhu kuthinte kakhulu ukukhuthazwa kwalolu buchwepheshe obusha.

Ngawo-1990, lolu hlobo lwe-scaffold lwalungakathuthukiswa futhi lwalusetshenziswa kancane kancane ekwakheni. Izimboni eziningi ze-gantry scaffold zavalwa noma zashintshelwa ekukhiqizeni, futhi amayunithi ambalwa kuphela anekhwalithi enhle yokucubungula aqhubeka nokukhiqiza. Ngakho-ke, kubalulekile ukuthuthukisa uhlobo olusha lwe-portal tripod ngokuhlanganiswa nezici zokwakha zezwe lethu.