The parabolic arch is hinged at B. Find the internal axial force at 13.1 m horizontally to the right of A. Assume the arch is a rigid body. Assumed the compound portions AB and BC can be treated as flexural members with centerline geometry given (do not attempt to find internal forces within the struts themselves). 6 k 4 k 2 k B В 20 ft 10 ft 6 ft 12 ft 8 ft 10 ft 10 ft

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