cargo midterm Flashcards
In all types of vessel construction, a structural framework is built first to provide the strength. This, when combined with the external covering, forms the hull, which is made watertight by welding the_ together and to the framework.
steel plates
A ship’s outer shell is composed of a bottom, sides, and a deck. The deck is made up of longitudinal strips of plating called
strakes
are specialized doors typically installed in areas located above the waterline of the vessel. Most of the doors on deck / accommodation on ship are weathertight door which are designed to open outwards ensuring a positive pressure - which, if water pressure builds up, forces the door to seal tighter, preventing water from entering the compartment.
Weathertight doors
are designed to block water from both sides, protecting the ship’s compartments. They are typically found below deck and may operate automatically or manually, opening and closing upwards or sideways. Many car carriers and roll-on/roll-off ships have watertight doors. Regulations require a system to remotely monitor the status of these doors.
Watertight doors
are openings in a ship’s deck or floor used for loading and unloading cargo, stores, or people. This effectively keeps water out of these areas and ultimately prevent damages to the goods. Additionally, they act as a shield, safeguarding the ship’s internal structure from the harsh marine environment and potential corrosion.
Hatches
are openings in a ship’s deck or floor used for loading and unloading cargo, stores, or people. This effectively keeps water out of these areas and ultimately prevent damages to the goods. Additionally, they act as a shield, safeguarding the ship’s internal structure from the harsh marine environment and potential corrosion.
Hatches
are openings in a ship’s deck or floor that provides access to a ladder from the weather deck of a vessel to the interior of the hull. It is a weathertight small square hatch designed only for the passage of a man.
Booby hatches
is a hinged metal cover which can be clamped over the porthole to secure it in heavy weather.
deadlight
uses a network of smaller, closely spaced longitudinals to directly support the plating.
longitudinal framing system
These structural members that run parallel to the length of the ship provide - and support the ship’s deck and ship’s hull.
longitudinal strength
, placed equally apart, directly support the plating of the deck, side and bottom plates, and bulkheads. This arrangement contributes to the longitudinal strength of the ship, making the longitudinal framing system more efficient in terms of structural integrity compared to the transverse system.
Longitudinal stiffeners
The usage of _is better appreciated in _ in which the principles of this structural arrangements are most commonly employed.
longitudinal framing . tanker vessels
are arranged so as to form structural rings that are closely spaced (from about 24 to 40 inches, or 600 to 1000 mm) throughout the length of the ship.
transverse stiffeners
From a structural point of view, the hull is watertight or intact from its outer shell and is closed at the top by the
main deck or the weather deck.
The loads acting on the hull structure when a ship is floating in still (calm) water are
static loads.
