The framework shown in Figure 1 is supported by an A-ball joint and an E-roller. Neglecting the weight of the members, determine: (a) The magnitude and direction of the reactions at the brackets A and E; (b) The components of the forces acting on member ABC (Au point B and point C). 60° 4 kN E B 1 m + - 1 m -- 1m

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Equilibrium and Support Reactions

Civil engineers deal with structures that are composed of several members connected or with individual members such as beams and columns. To analyze such structures, the condition of statics must be applied. Under the static condition, the members are considered to be in equilibrium under the action of forces, that is, the members are assumed to be having negligible velocity.