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Given a beam (a swingset) with three swings suspended from it. Each swing holds 450 lbs of stationary load for a total of 1,350 lbs of stationary weight suspended from the beam.
All three swings begin swinging in synch so that the load hits the bottom of the arc simultaneously.
How does one calculate the effective weight of the moving mass on the three swings combined?
To clarify - the need is to determine the maximum load that will be put on the beam, so that the proper sized beam can be selected to ensure it can be used without breaking. The charts that indicate maximum active load are here. I think we're looking for total uniformly distributed load (w from the tables) that will be applied.