Moment Resultant: In the case of two or multiple forces, the moment resultant is found as
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(2) |
Assuming the counter clockwise direction as positive, the moment resultant about point B is found as
Notice that F3 did not appear in the equation as it has a moment arm of zero with respect to point B.
If the resultant moment is positive, then the moment sense is in the counter clockwise direction. If negative, it is in the clockwise direction.