. -,...250,120.
-1/31/4-.(,
20%).
-.-,.
-. 8478-81500,-. --.-B500.
-1,2,[8].
-1,5/2,-.
-25/3.
,:
,.. 6.00
,.. 8.00
B...,H/2.. 10.0
...,H/2.. 1.0
K..B25K-..400K...... II
. , 2,00(1/4).
:
:
h =(1/12...1/20) l =1/156000=400,
b =(0,3...0,5) h =0,5400=200;
:
h =(1/8...1/15) l =1/118000@ 750, b =300;
70:2000.
:
:
l 01= l b /2 + /2= 2000200/2 250+ 120/2= 1710,
l 02= l b = 2000200=1800;
l 0= l - b =6000300=5700.
5700/1800=3,17>2,.
-.1.
. 1. :
1;2;31
1.2.
1(..1). ,(.2).112..1.