The vertical and horizontal poles at the traffic-light assembly are erected firs

Question

The vertical and horizontal poles at the traffic-light assembly are erected first. Determine the additional force and moment reactions at the base O caused by the addition of the three 87-lb traffic signals B, C, and D. Report your answers as a force magnitude and a moment magnitude.

The vertical and horizontal poles at the traffic-light assembly are erected first. Determine the additional force and moment reactions at the base O caused by the addition of the three 87-lb traffic signals B, C, and D. Report your answers as a force magnitude and a moment magnitude.

Explanation / Answer

force =87+87+87 =261 lbs (87*23/12 +87*46/12 ) -87*35/12 i =500.25j -253.75i magnitude =root(500.25^2+253.75^2) =560.93 lb.ft

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