310. 



STEEL BINS. 



CHAP. VIII. 



T = maximum tension in plate in Ib. per lineal foot of bin; 

 V reaction of the bunker in Ib. per lineal foot of bin; 

 C = capacity of bunker in cu. ft. per lineal foot of bin; 

 B = origin of coordinates. 



FIG. ii. 



Now if the right-hand half of the bunker be cut away as in (6) and moments be taken about 

 A, the moment will be 



M = H-S (20) 



If the bunker be assumed as an equilibrium polygon drawn by using a force polygon, the bending 

 moment at the center is equal to the pole distance multiplied by the intercept 5. Therefore H 

 must be equal to the pole distance of the force polygon. 



The following equations are deduced in the author's "The Design of Walls, Bins and Grain 

 Elevators." 



Equation of the curve of the bunker 



Capacity of bunker level full 



C = 



(22) 



In calculating P for any given bunker, since P is the maximum pressure for a triangular 

 loading 



P - f (23) 



for a bunker level full 



P = %S-w (24) 



also 



,, C-w-l 



(25) 





