I am thinking of building a simple shaded Arch for agriculture. I have an idea of building it with 30 ft sections of rebar that I will bend into a rough art shape. I would then weld rebar perpendicularly to hold each Arch rigidly to the one next to it. I could then put some fabric/membrane to cover and shade the rebar. Overall, it should be very low cost and simple to build. I was thinking of putting rebar every 12 in, but I have no way of knowing if I should increase the frequency or not.
For example, How do I calculate the weight that a structure like this can support? Could I hang a fan from the ceiling to push air through the arch. let's say the arch is 12ft high and ~17 ft wide (a bit less than 30 ft edge length). is there a formula for determining the amount of deflection?
a. what thickness of rebar should be used?
b. how frequently should rebar arches be built? ie spacing between arches.
If I were to have a tree fall on it, would animals or items inside be safe?
Is it okay to have a structure that's fairly flexible? I imagine it would move around quite a bit, but as long as it's anchored into the foundation....is that okay?
is this just a bad idea?
Totally an experimental thing here so all ideas and criticisms are welcome! here's a quick pic of what i am thinking (minus the lateral pieces of rebar to prevent the arches from just falling over :P :