Frames and stringers form parts of the hull structure (see pages 66 and 67), and they support and strengthen the ship's side plating .
Ifreyimu kunye ukubethelelwa kwamaplanga emacaleni kwenza inxalenye yesakhiwo sesiqu senqanawa (jonga iphepha 66 nelama-67), kwaye axhasa kwaye komeleza ukutywinwa kwamacala enqanwa.