Revision 1

Some Definitions

Sheer – Curvature of the uppermost continuous deck in the longitudinal direction towards the bow and stern.(Helps to keep the green sea to min in bad weather.)

Tumblehome – Inward curvature of the shell plating at the sides. This feature is rarely found on ships.

Flare – Outward curvature of the vessels bow plating.

• Helps increase buoyancy and prevent the bow from diving into the sea.
• Increase the breadth of the forecastle that provides space for mooring gears.
• Helps anchor fall clear when let go.

Framing Systems

Frame – On side plating running vertical up and down.

Beam – under deck runs transversely

Transverse – Under decks (deck transverse) and on bottom plating (bottom transverse) but not in the double bottom, Runs transversely like a beam but much heavier than it.

Floor – Found only in double bottoms, running transversely

Stringers – On side plating and longitudinal bulkhead , Runs horizontally fore and aft .

Longitudinal – Found in Longitudinally framed ships. under the deck , on side plating, on longitudinal bulkheads, on bottom plating and under the tank top. Runs fore and aft.

Girder – Found under deck and on the bottom plating . Girders run fore and aft and are deep and heavy in construction.These are imp longitudinal strength members.

Scantlings – A ship construction term used generally to define dimensions of various structure. Used to measure breadth, length, Height, diameter, etc.

3. TYPES OF FRAMING

transverse longitudinal and composite framing