Framing System

 

   It is the various methods used to stiffen the bottom shel and side, plating of a ship against the compressive forces of the sea.

   Types:

1. Transverse Framing System.
2. Longitudinal Framing System.
3. Combined Framing System.

1. Transverse Framing System:

• A framing system which is often adopted for the ships experiencing severe racking stress and having dominance over sagging and hogging stress.
• Deck beams are used to support deck and beams are supported by deck girders, knees are used to connect beam to ship side framing.
• Transverse frames at 3 m interval used to support the ship side plating through the length of the ship.
• Floor plates at 3 m intervals with center and side girders used to stiffen the double bottom space. 

2. Longitudinal Framing System : 

• A framing system which is often adopted for tankers and must be used for vessels greater than 198 metres in length.
• Longitudinal stiffeners are used along the ships sides and throughout the tanks length.
• Side and bottom transverses are used to support the longitudinals against compressive loading.
• Longitudinal bulkheads are provided to divide the cargo tank into center tank and wing tanks.
• Griders are used to support deck and bottom plating.
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• 3. Combined Framing System :
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• A framing system with best compromise to suite the INSITU structural demand to counter act the composite stress and strain.
•  Decks are supported by deck transverse with deck longitudinals interconnected the deck girders are used to support deck transverse.
•  Transverse frames along with side longitudinals used to support the ship side plating.
•  Floor plates with longitudinals and girders are used to strengthen the double bottle space. Brackets and knees are used to connecting members.
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