your going to want to put more supports if your going to do it that way because mine have twice as many as that and it still broke.
you should try a different design
Heres waht the jump looks like - we used those exact blue prints but had to do extra math cuz these guys forgot to show how far each support was appart from eachother
man, I saw many ramps liking this model, I think it is good, but more suports = better, this draw is junst the start of my project, I have many things to evolue. thank you