2-40 



BOAT HULL DESIGN 



TABLE 2-4. SIDE SHELL 



Framing: Bottom Longitudinals, Table 2-5. The bottom longitudinals are considered 

 as fixed ended beams, due to continuity. The design load is obtained from Fig. 2-15, and 

 is considered as a uniform load applied to the width of shell supported; that is a width equal 

 to the longitudinal spacing. A typical design pressure calculation is shown and the calcula- 

 tions for the longitudinals are given in Table 2-5. The maximum moment occurs at the 

 support point and places the inboard face of the longitudinal in compression. As noted in 

 the description of the design data sheets giving stiffener properties, Chapter 6, the woven 

 roving at the inboard compression face is the critical material. 



Typical Design Loads: For longitudinals No. 3 and 4 between the bulkhead at Station 3 

 and the transverse island at Station 5-1/2, Fig. 2-22. 



PD 



p H + Pl x F-l x F L 



(2.5) 



p T = 2^.0 psi - See bottom shell calculation 

 p H = 0.3 psi - See bottom shell calculation 

 F]_ and F L are from Fig. 2-15 



