Dr. Choi's Shipbuilding Cafe

  When a ship contract is signed, a notation is inserted into the contract. This time, we will organize the contents of these notations. First, the notations defined by the classification society are as follows. They indicate that the ship or facility has met certain essential requirements for the classification and are listed in the Class regulations related to each rule set. Class notations describe the structure or characteristics of the ship and are supported by technical requirements of the rules that can be clearly complied with. Sometimes, compliance with the rule requirements can be achieved by satisfactorily following ShipRight procedures (e.g. FDA, there may be other ways to demonstrate compliance with the rules). It is important to keep in mind that not all aspects of the Class Notation requirements are based solely on an evaluation of the ship plan against the rules, and many verifications are performed on site with the presence of an inspector. This is where the term S...

  Transverse web and top side wing tank in bulk hold Side structure The upper and lower parts of the shell form the walls of the side tank and the hopper tank and have a longitudinal structure, and the central part has a transverse structure formed by the side transverse allowing cargo to flow down naturally. A transverse rib structure is adopted to allow cargo to flow naturally. Conventionally, a large special was built at the location of the hopper transverse to support the weight of ballast or oil in the side tank, but each classification society usually recommends uniformly increasing the section modulus. Double bottom structure It has a double hull structure between the bottom shell and inner bottom plates, and the girders and floors are orthogonal to each other in a lattice structure.  The upper and lower inner bottom plates and bottom shell plates have a longitudinal rib structure to withstand the load or water pressure of the cargo hold and contribute to the longitudin...

 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...

In bulk carriers, it is relatively difficult to secure a dedicated ballast tank with a large capacity because ships transporting coal, grain, etc.,  which have a large cargo coefficient, need to make the cargo hold as large as possible so that they can load a lot of cargo. As a result, there is a shortage of ballast when operating an empty ship. As a countermeasure to this problem, a specific cargo hold is often used as a ballast tank. Since grabs or bulldozers are often inserted into cargo holds to unload bulk cargo ships, protrusions should not be installed on the double bottom inner bottom, and hatches should be made as large as possible to facilitate mechanical unloading. .~                             General bulk ship Above Fig is a general bulk cargo ship layout. ~ It is important is the top side wing tank also plays a role in preventing grains from accumulating on one side.        ...

      산 적 화물선은(Bulk Ship) 곡물류, 석탄 등의 화물을 수송하는 배로, 대부분 부정기 화물선으로 수송되어 왔습니다.~ 그러다가 제2차 세계 대전 후 해상 물량 수송의 대폭적인 증가와 함께 곡물류를 전용으로 수송하기 위한 선형으로 바뀐 거죠~ 운반하는 화물의 종류에 따라 곡물 운반선, 광석 운반선 등의 전용선과 곡물∙석탄 겸용 운반선, 광석 ∙석탄 겸용 운반선 (광탄선) 등이 있어요 OBO선( ore bulk oil carrier), OO선(ore oil carrier) 등은 고체뿐만 아니라 액체도 실을 수 있는 선박입니다.~ Bulk ships are ships that transport cargo such as grains and coal, and are mostly transported as irregular cargo ships. Then, with the significant increase in maritime cargo transportation after World War II, ships were changed to exclusively transport grains. Depending on the type of cargo being transported, there were dedicated ships such as grain carriers and ore carriers, grain and coal carriers, etc. There are ships that carry both ore and coal (coal ships). OBO ships (ore bulk oil carriers) and OO ships (ore oil carriers) are ships that can carry liquids as well as solids.~ 벌크선 종 화물 수송 수요의 다양화, 수송 지역의 다변화에 대응하여 수송해 생 산성을 최대한으로 높이기 위해 Dry Cargo 와 Wet Cargo 모두를 운송...