The upper part of the stern of a ship extends abaft of the rudder post. And there is special arrangement of framing to support it. This framing is mainly carried by the transom which consist of deep and heavy floor securely attached to the rudder post in association of transverse frame and beam. These are known as Transom Floor, Transom Frame and Transom Beam.
Transom floor has same depth as that of depth of cellular double bottom, but must be slightly thicker.
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1. Cruiser Stern :- have a system of ordinary transverse framing supported by an intercoastal girder at the centre line. This girder has to be doubled , just abaft the transom floor, to allow the rudder stock to pass. A number of cant frame are fitted abaft the aftermost transom frame.
The frame should be of same size as bulb angle frame in peaks and are extend to the strength deck. The frame space is not to exceed 610 mm.
Where extra strength is required web frames may be required and also extra longitudinal girders to support it.
2. Transom Stern:- is same as cruiser stern except that cant frame at the after end is omitted and is replaced by flat plate called transom.
One response to “Stern frames”
Useful article for Designing a Stern of ship and boat .thanks for your post