DESIGN DETAILS 



3-13 



BUI LT-UP 

 IBEPGLASS MAS 



ADDITIONAL LOCAL FIBERGLA5S 

 REINFORCEMENT TO DISTRIBUTE 

 LOAD 



Fig. 3-37. Mast Step at Bottom of Boat 

 Note Taper of Fiberglass Mast Step to 

 Reduce Hard Spot 



Figs. 3-38 through 3-41 indicate a number of different attachments. Note that, 

 wherever possible, the fittings should be located near a structural strong point in the boat 

 such as, a frame, bulkhead or the deck edge. These locations simplify the design of a 

 satisfactory foundation and avoid interferences with the arrangement of the boat. 



The detail design of bolted and threaded fastener connections is discussed later in this 

 Chapter. Where attachments become a permanent part of the structure, the bolt heads and 

 nuts may be sealed with resin or covered with a ply of reinforcement. 



CHAI N PLATE 



OPTIONAL ADDITIONAL PLATES 

 WHERE INCREASED BOLTING 

 REQUI RED 



LOCAL REINFORCEMENT ADDED 

 TO REDUCE BEARING STRESS 



SIMPLE EXTERIOR SlOE STAY CHAIN PLATE. 

 DETAIL 15 USED AT THE BOW FOR FORE STAY 



THROUGH BOLTS 



5 I Ml LAP 



CHAI N PLATES 



-DECK EDGE 



FLAT BAR 

 CHAIN PLATE 



F IBERGLASS 

 BRACKET AND 

 BONDI NG ANGLES 



LOCAL REINFORCING 

 AT TOES 



INTERIOR SIDE CHAIN PLATE. CHAIN PLATES MAY BE CONNECTED 

 TO A TRANSVERSE BULKHEAD, OP THE BOTTOM OF THE BRACKET MAY 

 BE CONNECTED TO A LONGITUDINAL FRAME. BOTH ARE IMPROVED 

 CONSTRUCTIONS. CONSTRUCTION SHOWN IS CONSIDERED THE MIN- 

 IMUM ACCEPTABLE. A SIMILAR DETAIL IS USED ON THE TRANSOM 

 FOR BACK STAY CHAIN PLATES. 



Fig. 3-38. Chain Plate Attachments 



THROUGH BOLTS - 

 COUNTERSINK AND COVER 

 OUTBOARD SI DE 



LOCAL REINFORCEMENT ADDED 

 TO REDUCE BEARING STRESS 



DECK EDGE 



THROUGH BOLTS - 

 COUNTERSINK AND COVER 

 0UT50ARD SIDE 



Wl NGS CUT OFF BELOW 

 DECK AND WEB EXTENDED 

 THROUGH DECK 



DECK EDGE 



LOCAL REINFORCEMENT 

 ADDED TO REDUCE 

 BEARING STRESS 



Fig. 3-39. Chain Plate Attachments 

 Simple Interior Side Stay Chain Plate 



Fig. 3-40. Chain Plate Attachment - 

 Wing Channel Side Stay Plate 



