bracket & collar plate

Brian.Lin

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Aug 31, 2006
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Dear sir,
attached please find the frame section.(aluminum boat abt. 17M).
the class add some brackets and collar plate on the long..
I want to know more reason for the extra bracket and collar plate design.
does any one have the books or documents about the issue?
 

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They prevent crack starting and structural crippling caused by the cutouts for the longitudinals. See Ship Structures Committee Report 331 (SSC-331) DESIGN GUIDE FOR SHIP STRUCTUAL DETAILS.
 
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