GEAIN PEESSURES IN STORAGE BINS. 9 



Table 3a. — Maximum resisting moynents developed and steel areas required for different 

 thicknesses of straight bin walls per foot in height. 



/s= 16000 



/c=650 



p= 0.0077 



fc= 0.378 



j= 0.874 



C=bfspj=1292 pi 



= 0.0924 



Thick- 



Concrete 





Maximum 



Required 



,, , , ^ mj fsd 





ness of 



outside 



Depth to 



resisting 



steel area 





12 





wall in 

 inches. 



of steel 

 in inches. 



steel In 

 inches. 



moment 

 in inch 



m square 

 inches. 





















pounds. 











t 



e 



d 



Jlf=1292(J2 



a=0.0924d 



TO=8 



771=10 



7n=12 



4 



1 



3 



11600 



0.277 



28000 



35000 



42000 



5 



1 



4 



20700 



.370 



37300 



46600 



56000 



6 



u 



4! 



29200 



.439 



44300 



55300 



66400 



6 



1 



5 



32300 



.462 



46600 



58300 



70000 



7 



u 



5' 



42700 



.531 



53700 



67000 



80400 



7 



1 



6 



46500 



.554 



56000 



70000 



83900 



8 



n 



f'i 



64600 



.600 



60600 



75700 



90900 



8 



li 



6i 



58900 



.624 



62900 



78600 



94400 



9 



li 



7i 



72700 



.693 



70000 



87400 



104900 



9 



li 



n 



77600 



.716 



72200 



90300 



108400 



Table 3b. — Maximum resisting mojnents developed and steel areas required for different 

 thicknesses of straight bin tcalls per foot in height. 



/»= 18000 



fc=700 



p= 0.007 2 



fc= 0.368 



i= 0.877 



C=bf,pj=nCA pi 



= 0.0864 



Thick- 

 ness of- 



Concrete 

 outside 



Depth to 



Maximum 

 resisting 



Required 

 steel area 



-. , , ^ mj fsd 

 Values for R=^^^^-- 



= 1315 771 d 



wall in 

 inches. 



of steel 

 in inches. 



steel in 

 inches. 



moment 

 in inch 



m square 

 inches. 





















pounds. 











t 



e 



d 



Jlf=1364d> 



a=-0.0864d 



TO=8 



7n=10 



771=12 



4 



1 



3 



12300 



0.259 



31600 



39400 



47300 



5 



1 



4 



21800 



.346 



42100 



52600 



63100 



6 



li 



4i 



80800 



.410 



50000 



62500 



75000 



C 



1 



5 



34100 



.432 



52600 



65800 



78900 



7 



li 



H 



45100 



.497 



60500 



75600 



90700 



7 



1 



6 



49100 



- .518 



63100 



78900 



94700 



8 



H 



6J 



57600 



.561 



68400 



85500 



102600 



8 



li 



6i 



62140 



.583 



71000 



88800 



106500 



9 



n 



7i 



76700 



.648 



78900 



98600 



118400 







li 



n 



81920 



.670 



81500 



101900 



122300 



Table 3c. — Maximum resisting moments developed and steel areas required for different 

 thicknesses of straight bin walls per foot in height. 



/b= 20000 



/c=700 



p= 0.0060 



fc=0.344 



i= 0.885 



C=hf^pj=121i p 



6=0.072 



Thick- 



Concrete 





Maximum 



Required 



Values for P "^^f-^. 



-1475 md 



ness of 



outside 



Depth to 



resisting 



steel area 





12 





wall la 

 inches. 



of steel 

 in inches. 



steel in 

 inches. 



moment 

 in inch 



in square 

 inches. 





















pounds. 





771=8 



■777=10 



771=12 



t 



e 



d 



Jif=1274d2 



a=0.072d 









4 





3 



11500 



0.216 



3,5400 



44300 



53100 



5 





4 



20400 



.288 



47200 



59000 



70800 



6 



li 



4| 



28800 



.342 



56100 



70000 



84100 



6 





5 



31900 



.360 



59000 



73800 



88500 



7 



n 



5J 



42100 



.414 



67900 



84800 



101700 



7 





6 



45900 



.4.32 



70800 



88500 



106200 



8 



li 



6i 



53900 



.468 



76700 



95900 



115000 



8 



ji 



61 



58000 



.486 



79700 



99600 



119400 



9 



li 



7i 



71700 



.5^10 



88500 



110600 



132750 



9 





7i 



76600 



.558 



91500 



114300 



137150 



