se 
TaBLE 3a.— Maximum resisting moments developed and steel areas required for different 
GRAIN PRESSURES IN STORAGE BINS. 
thicknesses of straight bin walls per foot in height. 
n=15 
s=16000 fc=650 p=0.0077 k=0.378 j=0.874 C=b fs p j=1292 sp b=0.0924 
Thick- | Concrete Maximum | Required “ OI ele ee 
ness of | outside | Depthto| resisting | steel area Values for t= 1D fiefs ISS e 
wallin | ofsteel | steelin | moment } in square 
inches. |in inches.| inches. in inch inches. 
pounds. 
t e d M=1292d 2| a=0.0924d m=8 m=10 m=12 
4 1 3 11609 0.277 28000 35900 42000 
5 1 4 20700 .370 37300 46600 56000 
6 1} 43 29200 - 439 44300 55300 66400 
6 1 5 32300 - 462 46600 58300 70000 
7 14 53 42700 531 53700 67000 80400 
7 1 6 46500 554 56000 70000 83900 
8 13 63 54600 . 600 60600 75700 90900 
8 14 62 58900 -624 62900 78600 94400 
9 13 74 72700 . 693 70000 87400 104900 
9 14 73 77600 .716 72200 90300 108400 
TABLE 38.— Maximum resisting moments developed and steel areas required for different 
thicknesses of straight bin walls per foot in height. 
fa=18000 fc=700 p=0.0072 
Thick- 
ness of 
wall in 
inches. 
t 
° 
WODMONNOOOS 
TABLE 3c.— Maximum resisting moments developed and steel areas required for different 
fs= 20000 
Thick- 
ness of 
wallin 
inches, 
t 
ODM COONNOODUS 
Concrete 
outside 
of steel 
in inches. 
é 
Depth to 
steel in 
inches. 
d 
n=15 
k=0.368 j=0.877 
Maximum | Required 
resisting steel area 
moment | in square 
in inch inches. 
pounds. 
M=1364d 2 | a=0.0864d 
12300 0.259 
21800 . 346 
30800 - 410 
84100 - 432 
45100 . 497 
49100 -518 
57600 . 561 
62140 - 583 
76700 - 648 
81920 . 670 
C=b fa p j=1364 p b=0.0864 
Values for R=——- 
M=8 
31600 
42100 
50000 
52600 
60500 
63100 
68400 
71000 
78900 
81500 
m j fs d 
i 1315 md 
m=10 m=12 
39400 47300 
52600 63100 
62500 75000 
65800 78900 
75600 90700 
78900 94700 
8500 102600 
88800 106500 
98600 118400 
101900 122300 
thicknesses of straight bin walls per foot in height. 
fc=700 
Concrete 
outside 
of steel 
in inches. 
é 
Ft et et et et et pt 
ie 
Beit eh 
C=b fa p j=1274 +p b=0.072 
Values for yp ede 1475 md 
i n=15 
p=0.0060 k=0.344 j=0.885 
Maximum | Required 
Depth to| resisting | steel area 
steelin | moment | in square 
inches. in inch inches. 
ounds. m= 8 
d M=1274d2 | a=0.072d 
3 11500 0.216 35400 
4 20400 . 288 47200 
43 28800 342 56100 
5 31900 . 360 59000 
53 42100 414 67900 
6 45900 . 432 70800 
64 53900 - 468 76700 
6} 58000 . 486 79700 
73 71700 - 540 88500 
Uh 76600 . 558 91500 
12 
m= 10 m=12 
44300 53100 
59000 70800 
70000 84100 
73800 88500 
84800 101700 
88500 106200 
95900 115000 
99600 119400 
110600 132750 
114300 137150 
9 
