A beam that is part of a rigid frame has end moments and mid-span moments for dead, live, and earthquake loads shown below. Determine the governing load combination for both negative and positive moments at the ends and mid-span of the beam. Earthquake load can act in either direction, generating both negative and positive moments in the beam.

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End Moments (ft-kip) Dead Load -180 Live Load -150 Earthquake +80) Mid-Span Moments (ft-kip) +90 +150 0