  h,      35 - 50 .
       
:     < 120  h = h - 2,   
  =  120  150  h = h - 3,  h -  
, 

       
   hx  rx   :

h = (rx + 1,85hx) / 1,7


:

    
 h <= 150  , 
                                                                  
 , 

   h0,                          ho = 0.85h                                 h0 = 0.92h

        r0 = (1.35 - 0.0025h)h                  r0 = 1.7h
r0   , 

         S0 = 2r0                                      S0 = 2r0
 S0   ,  

         rx = (1.35 - 0.0025h)(h - hx/0.85)   rx = 1.7(h - hx / 0.92)
rx     hx  , 

          Sx = 2rx                                       Sx = 2rx
 Sx    hx  , 
