Determine the forces in members BC, BE, and BF. The triangles are isosceles. The forces are positive if in tension, negative if in compression. B MAA 62° 62° /62° 62⁰ F E 30° А 62 BE= G Answers: BC = i L 62° D L

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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.