By Newtonian physics F=MA where Force (F) = Mass (M) x Angular Aceleration (A).
The stated cable support rating of 1000 pounds (FR Roo and Shamrock owners manual) is just static load (a 1000 pound Gorilla sleeping quietly in the bunk) .....Surely the engineers also anticipated additional dynamic force could occur.....because every bathroom stall in every engineering classroom building at every university in this nation has parodies of F = MA etched on the wall.
Where "F" is uhh, uhh, "Force" and equals the Mass of the uhh, uhh (behind)
and "A" is the Angle of the uhh, uhh (dangle).
Anyway....these bunks are like the glass floor at the Hancock Bidg in Chicago........sounds scary to wonder what would happen if everyone on that observation deck jumped up in the air at the same time.......they are "over engineered" to allow for uh, uh, uh "extreme physical activity" by even the most uh, uh, uh "robust" RV customers.
and sleep soundly.