GENERAL METHODS. § j. Inttoduction. i. Graphic Statics has for its object the Solution of problems in statics by means of geomctrical constructions, the results being obtaincd directly from the scale drawings. (A knowledge of Statics is presupposed. However, a brief presentation of its principlcs and methods in case of forecs lying in the samc plane will be made. In the subsequent chapters, familiarity with the subject of Strength of Materials, including beam stresses and deflections, is also assumed.) 2. Representation of Forces. A force is fully determined when its magnitude, direclion, and point of applicalion are known. In dealing with problems in Statics of Rigid Bodies, the magnitude, direction, and line of action of a force are the elements commonly involved, since the equilibrium or motion of such a body is not affected by transferring ihe point of application of a force to any other point in its line of action. 3. Resultant of any System of Forces Lying in the Same PlaneTable...

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