Portal scaffold ndi imodzi mwama scaffold omwe amagwiritsidwa ntchito kwambiri pomanga. Chifukwa chimango chachikulu chimakhala ngati "chitseko", chimatchedwa portal kapena portal scaffold, chomwe chimatchedwanso Eagle frame kapena gantry. Mtundu uwu wa scaffold umapangidwa makamaka ndi chimango chachikulu, chimango chamtanda, cholumikizira chozungulira, bolodi, bolodi losinthika, etc.

Portal scaffold ndi imodzi mwama scaffold omwe amagwiritsidwa ntchito kwambiri pomanga. Chifukwa chimango chachikulu chimakhala ngati "chitseko", chimatchedwa portal kapena portal scaffold, chomwe chimatchedwanso Eagle frame kapena gantry. Mtundu uwu wa scaffold umapangidwa makamaka ndi chimango chachikulu, chimango chamtanda, chingwe cholumikizira, scaffold board, chosinthika maziko, etc. Portal scaffold ndi chida chomangira chomwe chinapangidwa ndi United States kumapeto kwa zaka za m'ma 1950. Chifukwa chakuti ili ndi ubwino wa msonkhano wosavuta ndi kusokoneza, kuyenda kosavuta, kunyamula bwino, kugwiritsidwa ntchito kotetezeka ndi kodalirika komanso ubwino wachuma, wakula mofulumira. Pofika m'ma 1960, Europe, Japan ndi maiko ena motsatizana adayambitsa ndikukulitsa mtundu uwu wa scaffold. Ku Ulaya, Japan ndi mayiko ena, ntchito zipata scaffold ndi yaikulu, mlandu pafupifupi 50% ya mitundu yonse ya scaffolds, ndi makampani ambiri akatswiri kupanga zipata scaffolds machitidwe osiyanasiyana akhazikitsidwa m'mayiko osiyanasiyana.

Kuyambira zaka za m'ma 1970, China yakhala ikuyambitsa ndondomeko ya scaffold kuchokera ku Japan, United States, Britain ndi mayiko ena, yomwe yakhala ikugwiritsidwa ntchito pomanga nyumba zina zapamwamba ndikupeza zotsatira zabwino. Itha kugwiritsidwa ntchito osati ngati scaffolds zamkati ndi zakunja zomanga zomanga, komanso ngati slab pansi, thandizo la mawonekedwe a matabwa ndi scaffold yamafoni. Ili ndi ntchito zambiri, chifukwa chake imatchedwanso multifunctional scaffold.

Pofika kumayambiriro kwa zaka za m'ma 1980, ena apakhomo ndi opanga anayamba kutsanzira scaffold portal. Mpaka 1985, opanga ma portal scaffold 10 adakhazikitsidwa motsatizana. The portal scaffold yakhala yotchuka kwambiri ndikugwiritsidwa ntchito pomanga m'madera ena, ndipo yalandiridwa ndi mayunitsi omanga a Guangda. Komabe, chifukwa cha kusiyanasiyana kwazinthu komanso miyezo yapamwamba ya fakitale iliyonse, zimabweretsa zovuta pakugwiritsa ntchito ndikuwongolera gawo lomanga. Izi zakhudza kwambiri kukwezedwa kwaukadaulo watsopanowu.

Pofika m'ma 1990, scaffold yamtunduwu inali isanapangidwe ndipo idagwiritsidwa ntchito mochepera pomanga. Mafakitole ambiri a gantry scaffold adatsekedwa kapena kusinthidwa kuti apange, ndipo mayunitsi ochepa okha omwe ali ndi luso lokonzekera bwino adapitilira kupanga. Chifukwa chake, ndikofunikira kupanga mtundu watsopano wa portal tripod kuphatikiza ndi mapangidwe adziko lathu.