cannesdo wrote:
westend wrote:
I just went up on the roof and jumped. No creaks. Another advantage to no using the stabilizing jacks is that the rig gives with bouncing. It's not locked in place. And I could put additional springs at the hooks near the ceiling for added cushioning.
Using springs will increase momental force, it does not make things better.
I'm thinking in terms of *give*. It's a more flexible connection and that eliminates the more jarring movements.
Which is harder on your body...being connected to someone else with a steel tube? Or with a bungie cord?
Based on your post, I was referring to the load on the RV's structure. I have no input for you on the effect of springs, your swing, and your body.
Read about
Hookes Law, the effect of actual stress/strain, and spring oscillation. This all gets complicated quickly when dealing with a truss as harmonic forces can interact with the truss with unpredictable results.
A real world example (disregarding springs): I was referred to a customer that was remodeling their house. They had been told at the lumber superstore that it was OK to remove a section of a wall because they had a particular type of truss (King truss). The section of wall removed was a load bearing wall. The truss had deformed along the bottom chord more than an inch. A good snowfall would have had the ceiling collapsed into the living room. A beam was installed under the truss to correct the situation.
Any time you are dealing with a truss, you have to acknowledge the engineering of the whole truss and it's application in relation to the structure, rather than assuming weight can be supported or added in any given spot.
