Ma tana ake tikanga whakaarahanga waipēhi, kei te whakahaeretia te punaha piki-a-papa-a-ringa e kiia nei ko te punaha hiko-auto-a-te-a-ringa (ACS). He rango waipēhi me te commutator o runga me raro ka taea te whakarereke i te mana hiki i runga i te taiapa matua, reriwe piki ranei he waahanga o te punaha formwork (ACS). Ko te taiapa matua me te reriwe piki ka eke ki runga na te kaha o te punaha waipēhi. Ko te mutunga mai, karekau he warou, ka piki haere te katoa o te punaha waka hiko (ACS). He pai te pai o te hanga hiko-aunoa waipēhi he tere, he haumaru, he ngawari hoki te whakahaere; karekau he taputapu hiki ake e hiahiatia ana i te wa e piki ana. I te wa e hanga ana i nga pourewa teitei me nga piriti, ko te punaha ACS formwork te huarahi tuatahi.