CALCULATION OF REACTIONS 



121 



FIG. 65. 



we have H = H 1 



and V + F 1 = P 



Taking moments about B, we have 



and taking moments about center hinge C, we have 



2 " 



Solving (60) we have 



and 



Substituting (61) in (62), we have 



(60) 



(61) 



(62) 

 (63) 



(64) 



The horizontal reactions at the crown are the same as at the sup- 

 ports. Reactions for an inclined load may be found by substituting the 

 proper moment arms. 



Calculation of Reactions : Graphic Method. Let P, Fig. 66, be 

 the resultant of all the loads on the left segment. Since there is no 



