WIND LOAD STRESSES, CASE 2 



97 



structing the polygon A-b-c-i ; and at the top of the column by con- 

 structing the polygon c-x-x-2-i, etc., until the diagram is checked up at C 

 with C-A = R 1 . The indeterminate case at the joint C7 2 , can be solved 



u * ?'....?' '?' 'l 5 g ' 



2240 > 



CASE a 



Columns Pin Connected 

 Maximum Mom- in Col- =940800 in-lbs. C 



Wind Load Stress Diagram 

 Wind Horizontal, 20 Ibs-persq-fT- 



O 4000 8000 



12 8 4 A 



FIG. 54. WIND LOAD STRESS DIAGRAM, CASE 2. 



by computing the stress in 5-6 (component due to stress in 6-7), and 

 substituting it in the diagram, or by substituting an auxiliary member. 



The stresses in the auxiliary members are represented >by dotted 

 lines and are of no value in designing the bent. It should be noted 

 that the auxiliary members do not affect the stresses in the trusses and 

 knee braces, which are correctly given in the stress diagram. 



The maximum stress in the knee brace A-i$ is compression, and 

 occurs on the leeward side. 



