3.9 (3.8).
(11)
Wpl (7); Wpl :
(12)
,
(13)
txy , .
1. : h = 200 , = 2,7, ( ) - 15, D1600 (b = 14 000 ); 1 N = 900 , Nl = = 540 ; .
.
. 3.6 N = 900 , , . 3.3.
10 , . . 0 = 10 . , , l 0, . 17, l 0 = = 2,7 .
. 3.7.
(10) jl, b = 1,0 (. . 16). ,
, Rb, . 3.1, g b 2 = 0,90, .. Rb = 7,7 , , . 9, g b 3 = 0,85 g b 9 = 0,90, Rb = 7,70,850,90 = 5,89 .
d e = d e,min = 0,306.
Ncr (9), 1 , . . = 200 1000 = 200 000 2:
(2), (3):
. . .
3.10 (3.9). , , . , . , (, , ).
,