WIND LOAD STRESSES, CASE 4 



99 



Case 4. Wind Load Stresses : Wind Normal ; Columns Hinged. 



In Fig. 56 the resultant of the external wind forces on the sides and 

 the roof acts through their intersection, and is parallel to C B in the 

 stress diagram (line C B is not drawn). To calculate V and F 1 con- 

 nect the point of intersection, A, of the resultant wind and the vertical 

 line through the center of truss, with the bases of the columns B and C. 



* 



Wind 6400 \ Ibs. 



CASE 4 



Wind Load Stress Diagram 



Wind Normal, Roof 18 Ibs-Sides20 Ibs-sq-ft- 



4000 8000 



a B 



FIG. 56. WIND LOAD STRESS DIAGRAM,, CASE 4. 



