Uma kuqhathaniswa nezinto zendabuko, imikhiqizo ye-fiberglass inezinzuzo ezisobala ekuqineni, ukumelana nokugqwala, ukumelana nemihuzuko kanye nokubekezelela okushisayo, futhi ingahlangabezana nezidingo zezimoto zamandla angasindi namandla aphezulu. Ngakho-ke, ukusetshenziswa kwayo kwezokuthutha kuyanda. Izicelo: imizimba yezimoto, izihlalo kanye nemizimba yesitimela esinesivinini esikhulu, isakhiwo semikhumbi, isakhiwo semikhumbi, izikebhe, njll.