This aids the drainage of any surface water to the gutters, called waterways, which extend fore and aft at the sides of the decks.
Okukuncedisa ukhutsho lwamunzi nakuwe nawuphi, na umzangetho ukuwasa kwiigatha, ezibizwe njenge ndlela manzi, ezinabela nyaphambile ukuyekutsho emva emacaleni emyangatho.