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Bulk 4 Structural Terminology and Forms

 Structural terminology and forms.


First, this is the structure of the hold part where cargo is loaded.


Typical Cargo Hold – single side skin

There is a top side wing tank to prevent cargo from stacking and tilting.

The hull shell is vertically reinforced with T-shaped webs (at regular intervals).

The hopper tank is tilted at a 45-degree angle to avoid concentrated loads and makes loading and unloading of cargo easy. Also, cleaning is easy because it is tilted ~ 

The cargo floor is double bottom~

Typical Transverse Section


The picture above shows the inside of the cargo window in section.

Each term is written down. 

The form of the structure is to use a tank by blocking the upper edge of the cargo hold with an inclined plate (top side tank), and to allow the side cargo to easily flow down, a hopper is installed by attaching inclined plates to the corners of both sides of the cargo hold floor. 

The hopper has almost double the strength. It has the function of reducing the height of the double jaw by making it larger.

There are two types of decks~

Longitudinal type

Unlike general cargo ships, the deck area between hatches adopts a transverse structure. 

The reason is that the water pressure applied to the ship's side structure is transmitted to the side tanks on both sides, so the deck between hatches receives compressive force from both sides, causing longitudinal damage. 

Since the structure is prone to buckling of the deck, the transverse  structure is often used.~


Transverse type


The deck of the side tank adopts a longitudinal frame type structure to ensure sufficient longitudinal strength.~

Both directions are different. The system changes depending on the direction of the members.




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