DESIGN DETAILS 



3-9 



BULKHEAD OR FRAME 



THESE DIMENSIONS SHOULD 

 BE MINIMUM CONSISTENT 

 WITH STRENGTH REQUIREMENT. 

 2" MINIMUM RECOMMENDED. 



FIBERGLASS ANGLES 

 TO FORM CONNECTION 



EXTRA PLIES OF FIBERGLASS MAT 

 TO REINFORCE SHELL - OPTIONAL 



Fig. 3-24. Connection - Bulkheads and 

 Framing to Shell or Deck 



'SHELL OP DECK 

 LAMI NATE 



FILLET CORES - USE CONTINUOUS 

 STRIP WITH INCOMPRESSIBLE 

 BULKHEAD OR FRAME 



Where incompressible bulkheads and 

 frames, such as, plywood or hard woods 

 are connected to thin shell or deck lami- 

 nates, the length of the fiberglass con- 

 necting angles should be determined by- 

 test to insure that unfairness in the hull or deck will not occur. Shrinkage during cure of 

 the connecting angles tends to pull the bulkhead or frame through the laminate, causing a 

 slight bump. Experience has shown that this is particularly noticeable when incompressible 

 frame cores are completely encased in the laminate. This effect can be minimized by 

 replacing the separate low density fillet cores with a continuous strip inserted between the 

 framing member and the shell. 



Cabin Trunk to Deck 



In wooden construction, the joint between the cabin trunk and the deck causes consider- 

 able difficulty. In many fiberglass boats the problem is avoided completely by molding the 

 cabin trunk and the deck in one unit and eliminating this connection entirely. A typical 

 example of this construction is shown in Fig. 3-25. If this desired one piece construction 

 is not possible, the connection shown in Figs. 3-26 or 3-27 may be used. The joint between 

 the cabin trunk and the decks is an important one from a strength viewpoint, and reinforcing 

 of both sides as shown is considered essential. 



PRE-MOLDED CAB I 



CONTINUOUS LAMINATE 



Fig. 3-25. Cabin and Deck 

 Molded as a Single Unit 



PRE-MOLDED DECK 



F I BERGLASS JOI NT 

 RE I NFORCEMENT 



PRE-MOLDED CAB I N 



F IBERGLASS JOI NT 

 REINFORCEMENT 



1 PLY OF MAT 



Fig. 3-26. Cabin to Deck Connection 

 Pre-molded Cabin and Deck - Single 

 Skin Construction 



Fig. 3-27. Cabin to Deck Connection - 

 Pre-molded Cabin and Deck - Sandwich 

 Construction 



PRE-MOLDED DECK 



