(1) Each watertight subdivision bulkhead, whether transverse or longitudinal,
shall be constructed having scantlings as specified in section 1.3, in the
definition for “watertight”, and in all cases, watertight subdivision
bulkheads shall be capable of supporting at least the pressure due to a head
of water up to the bulkhead deck.
(2) Steps and recesses in watertight bulkheads shall be as strong as the
bulkhead at the place where each occurs.