3-23. Determine the force in members EF EP, and L.K of the Baltimore bridge truss and state if the members are in tensio

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3 23 Determine The Force In Members Ef Ep And L K Of The Baltimore Bridge Truss And State If The Members Are In Tensio 1 (128.73 KiB) Viewed 34 times

I am really curious about how to determine the moment way.
How we determime each moment is clockwise or unclockwise way??
Pls give me an explanation. thanks.
3-23. Determine the force in members EF EP, and L.K of the Baltimore bridge truss and state if the members are in tension or compression. Also, indicate all zero-force members. SOLUTION Support Reaction at I: +EMA = 0; I, (16) 2(12)-3(10) 5(8) 2(4) = 0 Iy = 6.375 kN Method of Joints: By inspection, BN, NC, DO, OC, HJ, JG and LE are zero-force members. Method of Sections: (+ΣΜx = 0; 3(2) + 6.375 (4) FEF(4) = 0 FEF= 7.875 kN (T) (+ΣΜ= = 0; 6.375 (8) FLK +1EF, = 0; 6.375-3-2- FEP sin 45° = 0 FEP 1.94 kN (T) 2(4) 3(2) - FLK (4) = 0 9.25 kN (C) Ans. Ans. Ans. Ans. جرایم مال 4m 2 kN D FLR FEB E FEF 8@2m 16 m 5 KN 3 KN 2 KN 12m 2m 3 KN Z KN 4 m 2 m Iz=6375 KN