CONTINUOUS TRUSSES 



49 



short span over the turntable. The moments Mi and 

 Ms over the turntable are assumed equal and, for con- 

 venience, their values are determined as if the truss was 

 a beam of constant cross-section. In any case the values 

 of M and MZ can be found by a more rigid method, if 

 desired, without increasing the labor of constructing the 

 influence diagrams. 



Tan 0i = 1. Tan 03 - 



FIG. 34. 



Top Chord of a Partially Continuous Truss. Referring to 

 Fig. 34, the top chord U^Ui has its center of moments 

 at L 3 . For loads in this span, 



and 



but 





where 



