W, 3,
3, (10)
R , /2;
R = 21,50 /2
/2
max, ×, .
h, .
hmin, , ,
, (11)
l , ;
[f/l] .
max/ max
0,8.
h, ,
,
= 60,51 , (12)
S ,
, ,
, (13)
h , .
(14)
l , .
82-70 14 .
500 , 82-70.
, 2,
2 (15)
, 2, ,
, (16)
b , ;
S , .
, b,
(17)
200. 30 . S, ,
(18)
S 8 - 40 , , S 82-70. 30 .
S b 82-70
, 2,
2 (19)
b/S 20.
b/S = 10 < 20
1.5
.
Ix, 4,
, (20)
4
W, 3,
3 (21)
h , .
(22)
S, 3,
(23)
, 2.
2
3.
s, /2, ,
(24)
/2
t, /2, ,
|
|
|
, (25)
Rs , /2
Rs=18,00 /2
/2
(26)
, /2;
= 21 000 /2;
[f/l] ,
1.6 ,
1
, , , t.
1 , ,
, (27)
S , 3.
3, (28)
, 2;
, .
(29)
2
tw, /2,
(30)
1 ,
2.
2, (31)
β , ;
β = 0,85;
f , .
,
Rwf=18
/2,
f = =0,8.
