An arch roof truss is loaded as shown. The length of all of the outer chords, AC, CE, ..., and OQ, is 1 m and the length of the webs AB, CD, EF, ..., and RQ is 0.4 m. Determine the force in members...

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An arch roof truss is loaded as shown. The length of all of the outer chords, AC, CE, ..., and OQ, is 1 m and the length of the webs AB, CD, EF, ..., and RQ is 0.4 m. Determine the force in members GI, GJ, and IJ.