, . N ton = 16 25 .
, . . , . , , , (. . 3.6). 15 20 .
, .
(. 4.10).
. 4.10.
:
-
, bh (ton 25 ).
( )
140´22 .
.
, N c .
kf = 7 ( kf, min= 7 t max = 25 ).
1 hr = 45 .
85 βf kf.
tw .
tw = 8 . . t ′ w = 18 .
1:5. bs = br = 140 . :
140×10 .
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, (. 4.11).
. 4.11.
.
td N:
(. . 4.4.1).
td = 22 .
(d = 7,5 ):
hd = N /(4 dRsγc) = 2067,18 / (4 0,75 13,92 1) = 49,5 .
hd = 50 .
:
Q = N /2 = 2067,18 / 2 = 1033,59 .
. td = 25 :
, ( ):
lw = hd 1 = 50 1 = 49 , 1 , .
kf = 7 , t = 25 .
85 βfkf. : lw = 49 < 85 × 0,9 × 0,7 = 53,5 . .
ts = 10 ,
bs :
bs = 30 .
. ( 4000 5000 ) . , . .
. . 20 30 , , (. 4.12).
. 4.12. . 4.13.
() 1,5 2 . , 3 , . , , . 24 36 . tap = 20 40 bap, (. 4.13).
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. .
14. - .