ʻO ka scaffold portal kekahi o nā scaffolds i hoʻohana nui ʻia i ke kūkulu ʻana. Ma muli o ke ʻano o ka "puka", ua kapa ʻia ʻo ia he portal a i ʻole portal scaffold, ʻike ʻia hoʻi ʻo Eagle frame a i ʻole gantry. ʻO kēia ʻano scaffold ka mea nui i haku ʻia me ke kumu nui, ke ʻano keʻa, ka brace diagonal cross, scaffold board, adjustable base, etc.

ʻO ka scaffold portal kekahi o nā scaffolds i hoʻohana nui ʻia i ke kūkulu ʻana. Ma muli o ke ʻano o ka "puka", ua kapa ʻia ʻo ia he portal a i ʻole portal scaffold, ʻike ʻia hoʻi ʻo Eagle frame a i ʻole gantry. ʻO kēia ʻano scaffold ka mea nui i haku ʻia me ka papa nui, ka pā kea, ka pale diagonal keʻa, ka papa scaffold, ke kumu hiki ke hoʻololi ʻia, a me nā mea ʻē aʻe. No ka mea, loaʻa iā ia nā pōmaikaʻi o ka hui maʻalahi a me ka wehe ʻana, ka neʻe maʻalahi, ka hiki ke lawe maikaʻi, ka hoʻohana palekana a hilinaʻi a me nā pono waiwai maikaʻi, ua ulu wikiwiki ia. I ka makahiki 1960, ua hoʻokomo a hoʻomohala ʻo ʻEulopa, Iapana a me nā ʻāina ʻē aʻe i kēia ʻano scaffold. Ma ʻEulopa, Iapana a me nā ʻāina ʻē aʻe, ʻo ka hoʻohana ʻana i ka scaffold portal ka mea nui loa, e helu ana ma kahi o 50% o nā ʻano scaffolds āpau, a ua hoʻokumu ʻia nā hui ʻoihana he nui e hana ana i nā scaffold portal o nā ʻōnaehana like ʻole ma nā ʻāina like ʻole.

Mai ka 1970s, ua hoʻokomo ʻo Kina i ka ʻōnaehana scaffold portal mai Iapana, ʻAmelika Hui Pū ʻIa, Beretania a me nā ʻāina ʻē aʻe, i hoʻohana ʻia i ke kūkulu ʻana i kekahi mau hale kiʻekiʻe a loaʻa nā hopena maikaʻi. Hiki ke hoʻohana ʻia ʻaʻole wale ma ke ʻano he scaffolds o loko a me waho no ke kūkulu hale, akā, ʻo ia hoʻi ma ke ʻano he papa papahele, kākoʻo formwork beam a me ka scaffold mobile. Loaʻa iā ia nā hana ʻoi aku, no laila ua kapa ʻia ʻo ia he multi-functional scaffold.

I ka hoʻomaka ʻana o nā makahiki 1980, ua hoʻomaka kekahi mau hale a me nā mea hana e hoʻohālike i ka scaffold portal. A hiki i 1985, ua hoʻokumu ʻia nā mea hana scaffold portal 10. Ua hoʻolaha nui ʻia ka scaffold portal a hoʻohana ʻia i nā hana kūkulu ma kekahi mau wahi, a ua hoʻokipa ʻia e nā ʻāpana kūkulu o Guangda. Eia nō naʻe, ma muli o nā kikoʻī huahana like ʻole a me nā kūlana maikaʻi o kēlā me kēia hale hana, lawe mai ia i kekahi mau pilikia i ka hoʻohana ʻana a me ka hoʻokele ʻana o ka hale kūkulu. Ua hoʻopilikia nui kēia i ka hoʻolaha ʻana i kēia ʻenehana hou.

I ka makahiki 1990, ʻaʻole i hoʻomohala ʻia kēia ʻano scaffold a ua emi iki ka hoʻohana ʻana i ke kūkulu ʻana. Nui nā hale hana scaffold gantry i pani ʻia a hoʻololi ʻia i ka hana ʻana, a he mau ʻāpana wale nō me ka maikaʻi o ka hana ʻana i hoʻomau ʻia e hana. No laila, pono e hoʻomohala i kahi ʻano hou o ka tripod portal i hui pū ʻia me nā hiʻohiʻona o kā mākou ʻāina.