Ƙarfe na asali shine farkon abin daidaitawa a cikin duniya, yana canza gine-gine. Ƙira ce mai sauƙi kuma mai ƙima, ƙera ta daga ƙarfe mai girma zuwa ƙayyadaddun kayan aikin ƙarfe, yana ba da izinin bambance-bambance a cikin ɗimbin amfani, gami da tallafin aikin ƙarya, azaman tudun ruwa, kuma azaman tallafi na ɗan lokaci. Ƙarfe yana da sauri don kafawa a cikin matakai masu sauƙi guda uku kuma mutum ɗaya zai iya sarrafa shi, yana tabbatar da abin dogara da tsarin tattalin arziki da aikace-aikace na scaffolding.
Abubuwan da ake buƙata na karfe:
1. Kai da farantin gindi don kiyaye katakon katako ko sauƙaƙe amfani da na'urorin haɗi.
2. Diamita na bututu na ciki yana ba da damar daidaitattun bututu da ma'aurata don amfani da su don dalilai na takalmin gyaran kafa.
3. Bututu na waje yana ɗaukar sashin zaren da rami don daidaita tsayin tsayi mai kyau. Rage ma'aurata suna ba da damar daidaitattun bututun sikeli don haɗa su zuwa bututun ƙarfe na waje don dalilai na takalmin gyaran kafa.
4. Zaren a kan bututu na waje yana ba da gyare-gyare mai kyau a cikin abubuwan da aka ba da su. Zaren da aka yi birgima yana riƙe kauri na bangon bututu kuma ta haka yana kiyaye matsakaicin ƙarfi.
5. The prop nut is the self-cleanted karfe prop nut cewa yana da rami a daya karshen domin sauki juya lokacin da prop rike yana kusa da ganuwar. Za'a iya ƙara ƙarin na goro don canza abin da ake amfani da shi zuwa strut-pull strut.