60 1. 1\ I. -LOAD STRESSES 



Bending moment at centre, li = Is = -s" 

 Af - ^i^l _ M t 



IF - T^ ~ w - < lla ) 



Shear at any section. 



s = M=_M _ Wt (12) 



Location of centre of gravity of loading on span. 



* = 

 When Mi = 0, 



. 

 TP.-M 



(13a) 



. 5. Pier Reaction. 

 For unequal spans ^ and /,. 



T + f - &" - 



For equal spans li and k equal to I. 



2 



g.**'*-"* o 



Relation between /? and A/, 



^ = ^Af (16) 



-Arf. 6. Girder Bridge with A/m /*. 

 Shear in end panel; general case. 



= -y-Afa-j-TrA/i rA/2 = -T~("T~A/3 -f T"A/i - ilf)(17) 



