238 CONTINUOUS GIRDER. [CHAP. XIII. 



For the reaction at any support, 1^ = S' m 4- S m . In which 

 we have always k = j , q = P (1 &), c[ = P Jc. 



IT 



A = P 4 2 (2 k - 3 #> -f If) and B = P I* (k - IP) for concen- 

 trated load ; and q = g 1 = $ w 4, and A = B = ^ w I* for uni- 

 form load entirely covering any one span. 



Also for o and d we have the following values : 



4 (4 4- 4) (4 + 4) - 

 44 



or, generally, 



o /^m-2 + ^m-l\ /C-8\ 



^ I ^ J " ^ left 



^s-l 



(4 + 4_t) (4-i + 



or, generally, 



7,7 7 



^s-rn+2 j ''s m+8 



As an illustration of the use of the above formulae, let us 

 take three unequal spans, load in the first. Then s = 3, r = 1, 



k = =-. For moment at second support, m = 2, or w > r j hence 

 4 



1VL -= /7 - A Cl + B fr 



^ * 



