I-steel formwork yakhiwe ngepuleti lobuso bensimbi elinezimbambo ezakhelwe ngaphakathi nama-flange kumamojula avamile. Ama-flange abhoboze izimbobo ngezikhathi ezithile zokuhlanganisa i-clamp.
I-formwork yensimbi iqinile futhi ihlala isikhathi eside, ngakho-ke ingasetshenziswa kabusha izikhathi eziningi ekwakheni. Kulula ukuhlanganisa nokubeka. Ngomumo nokwakheka okungaguquki, kufaneleka ngokwedlulele ukufaka isicelo esakhiweni okudingeka kuso inani elikhulu lesakhiwo esimise okufanayo, isb. Isakhiwo esiphakeme kakhulu, umgwaqo, ibhuloho njll.