Ship Plan Dimension - Ships Nostalgia
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Ship Plan Dimension

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  #1  
Old 11th July 2012, 15:00
MT Hopper's Avatar
MT Hopper MT Hopper is offline  
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Ship Plan Dimension

Another annoying newbie question.
Many of the ship plans I look at will often give simply "Depth" as a dimension.
My question is does one "assume" ( a highly dangerous practice) or is it the common practice and therefore by default that, the Depth given is in fact the Molded Depth, Depth mld or is it some other sort of Depth?
Cheers
Will
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  #2  
Old 11th July 2012, 16:05
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Quote:
Originally Posted by MT Hopper View Post
Another annoying newbie question.
Many of the ship plans I look at will often give simply "Depth" as a dimension.
My question is does one "assume" ( a highly dangerous practice) or is it the common practice and therefore by default that, the Depth given is in fact the Molded Depth, Depth mld or is it some other sort of Depth?
Cheers
Will
I would think its obvious Depth is Depth and Moulded Depth is Moulded Depth.(sometimes Breadth can be stated as a Moulded Breadth)
Depth;is always the distance between the base line and the upper continuous deck ( Molded Depth would be stated as another measurment,not assumed)
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Old 11th July 2012, 16:36
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Thanks for your reply.
As I said I am a newbie and was uncertain if the depth had some further meaning attached to it.I was perhaps mislead by the fact that some plans simply state Depth while others will list only Depth with a lower case mld behind it. When I went to a reference it displayed both Depth and DepthMLD as being the same thing. Being an airlubber it left me hesitant as to how to interpret the two terms when encountered in plans/drawings. Prima faciae it seems obvious but if one is a newbie, it ain't so. From the tone of the message response, sorry I apparently irked you. You could have chosen to not reply and sloughed it off.

Last edited by MT Hopper; 11th July 2012 at 16:39..
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Old 11th July 2012, 16:52
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Quote:
Originally Posted by MT Hopper View Post
Thanks for your reply.
As I said I am a newbie and was uncertain if the depth had some further meaning attached to it.I was perhaps mislead by the fact that some plans simply state Depth while others will list only Depth with a lower case mld behind it. When I went to a reference it displayed both Depth and DepthMLD as being the same thing. Being an airlubber it left me hesitant as to how to interpret the two terms when encountered in plans/drawings. Prima faciae it seems obvious but if one is a newbie, it ain't so. From the tone of the message response, sorry I apparently irked you. You could have chosen to not reply and sloughed it off.
Moulded dimensions,Distance between two points,measured at inside of shell plating(or outside framing)
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  #5  
Old 11th July 2012, 16:56
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MT it takes allsorts to make a world. Apologise for any offence caused, generally speaking we on SN are a helpful and friendly bunch of people.
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Old 11th July 2012, 17:23
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Quote:
Originally Posted by MT Hopper View Post
Another annoying newbie question.
Many of the ship plans I look at will often give simply "Depth" as a dimension.
My question is does one "assume" ( a highly dangerous practice) or is it the common practice and therefore by default that, the Depth given is in fact the Molded Depth, Depth mld or is it some other sort of Depth?
Cheers
Will
hi will, these were measurements as used by the naval architects as a guide for the men in the moulding loft to mould the frames,beams etc into the correct shape that is why the measurements are taken inside of the plating or the extreme of the frame or beam.they are not used in any calculations regarding stability

hope this helps

regards
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  #7  
Old 11th July 2012, 17:36
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Gentlemen. Thank you for your replies. I shall take it then that in fututre when I encounter the dimensions as simply a ships' Length Breadth and Depth, the depth referred to is the depth as measured from the top of the keel to the bottom of the continuous deck plate?
Thank you
Will
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  #8  
Old 16th July 2012, 05:48
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or Depth as usually given is measured from the top of the keel to the waterline
Thanks
Will
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  #9  
Old 16th July 2012, 08:04
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Originally Posted by MT Hopper View Post
or Depth as usually given is measured from the top of the keel to the waterline
Thanks
Will
This is the DRAFT(waterline to main deck FREEBOARD)Both added to-gether = Depth

Last edited by A.D.FROST; 16th July 2012 at 08:48..
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  #10  
Old 17th July 2012, 21:37
vectiscol vectiscol is offline  
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The moulded dimensions are measured from the heels of the frame/beam/stiffener, because the thickness of the strakes of plating may differ across the bottom or deck, or up the side shell or a bulkhead. The thickness of the plate is thrown from the moulded line, except for members on the centreline, which are often mounted with the centre of the plate on the centreline itself.
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