The lower tiers of cargo are usually of a heavy or robust nature which can be loaded at a greater rate than fragile or filler cargoes.
Izibophi zomthwalo ezisezantsi zidla ngokuba zibenzima okanye zomelele ngokwendalo ezinokulayishwa ngeqondo eliphezulu kunemithwalo yokuhlohla okanye eyophukayo.