218 CONTINUOUS GIRDER. [CHAP. XIII. 



REACTIONS AT SUPPORTS LIVE LOAD OVER SINGLE SPAN. 

 Coefficients of to I given in triangle. 



This triangle, similar to the preceding one for moments, 

 gives the moments at the left support of the loaded span, when 

 we count from left to right. Counting the other way, we have 

 the reactions at the right support of the loaded span. 



Thus for six spans, fourth span from left loaded, we count 



four from left in horizontal line for VI., and find - - w I for 



reaction at left support. For reaction at right , we count four 

 also from right end, and find w I. 



143. Reactions in unloaded Spans L,oad over one Span 

 only Table. The formulae of Art. 141 for the reaction at 

 any unloaded support are sufficiently simple and easy to apply ; 

 still we may, if thought preferable, also draw up tables for 

 these, to be used in connection with the triangle of the pre- 

 ceding Art. The following tables give the coefficients of w I 

 for the reactions not adjacent to the loaded span. The denomi- 

 nator of the fraction is to be taken from the triangle above ; the 

 tables referred to give only the numerators. 



