3-14 



DESIGN DETAILS 



/ff ch< 

 v \ 



THROUGH BOLTS 

 Wl TH LARGE WASHERS 



DECK EDGE F I TTING - 

 CHOCK OR CLEAT 



NORMAL LAMINATE 



CHOCK 



SEE DETAIL A 



f 



LOCAL REINFORCEMENT FOR 

 INCREASED DECK STRENGTH 

 BRACKETS TO BE USED AS NEEDED 

 FOR HEAVY DUTY FITTINGS 



DETAIL A 



THROUGH BOLTS Wl TH 

 LARGE WSSHERS^. 



DECK LAMINATE 



MOORING CLEAT 



JACK STAFF BASE 

 SEE DETAIL C 



SEE DETAIL B 

 TRANSVERSE BULKHEAD 



WINDSHIELD FASTENERS 

 SEE DETAIL C 



^LOCAL 

 REINFORCEMENT 

 'SHAPE MAY BE USED TO 

 PROVIDE REQUIRED STRENGTH 



DETAIL B 



SELF TAPPING OR TAPPED 

 FASTENERS, THROUGH BOLTS 

 WITH WASHERS MAY ALSO BE 

 USED DEPENDING ON LOAD 



MISCELLANEOUS FITTINGS - 

 WINDSHIELD, JACK STAFF BASE, ETC 



LOCAL REINFORCEMENT IF REQUIRED 



DETAIL C 



Fig. 3-41. Attachment of Fittings 

 APPENDAGE CONNECTIONS 



Rudder 



The attachment of the rudder to the hull is one of the most important connections which 

 must be made, and an extremely conservative design is recommended. Consequences of 

 failure are so serious that the additional cost and weight for an excessively strong joint is 

 more than justified. The loading on the rudder may be determined by standard formulas 

 contained in the usual naval architectural texts. In the case of rudder configurations using 

 gudgeons and pintles, which are often standard pieces, it is recommended that the attach- 

 ment to the hull be designed so that the pintle will fail before permanent damage is done to 

 the hull. Figs. 3-42 and 3-43 indicate standard methods for these connections. 



Shaft 



One of the most frequent causes of annoying leakage and excessive noise in small boats 

 is the passing of the propeller shaft through the shell. The problems associated with this 

 connection usually arise from poor workmanship, rather than structural inadequacy. The 

 designer can help insure proper workmanship, however, by providing a design for the 

 shaft support and connection to the hull which is simple and easy to install. 



The shaft passes through the hull in the conventional manner in a standard type bearing. 

 Normally, the shell laminate is completed, the hole for the bearing drilled out and the 

 bearing bonded in place with an adhesive. Some epoxy resins, because of their greater 

 strength and higher resistance to water penetration, are recommended, but polyester 

 resins have been successfully used. If required, local reinforcement can be added to 

 build up the laminate for proper seating of the bearing flange. 



OUTFIT CONNECTIONS 



On any small boat there are many small miscellaneous items which primarily con- 

 tribute to the usefulness or appearance of the craft. These items include windshields, 

 windows, flagstaff fittings, rubber treads, floor boards, etc. The common fastener for 



