Izinzipho zekhanda eziyi-Duplex ziyizinzipho ezikhethekile eziwusizo ekwakhiweni kwesikhashana, njenge-formwork yokuthela ukhonkolo noma ukunamathisela ama-cleat esikhashana ngesikhathi somsebenzi wokufulela.Ushayele isipikili kuze kube yilapho ikhanda elingezansi lishaywa ngokhuni.Uma sekuyisikhathi sokuqaqa iphrojekthi, ungakhipha isipikili usebenzisa ikhanda elingaphezulu kanye nozipho lwesando sakho noma ibha yokudonsa.