When a lower deck is designated as the freeboard deck, it
should be continuous in fore and aft direction as well as athwartship.
Such freeboard deck as minimum should consist of suitably framed stringers
at the ship sides and transversely at each watertight bulkhead which
extends to the upper deck, within cargo spaces. The width of these
stringers should not be less than can be conveniently fitted having
regard to the structure and the operation of the ship. Any arrangement
of stringers should be such that structural requirement can also be
met.