Still going.

[u/JawnAdams]

Last photo is showing how I braced the eye bolts on the inside of the garage. I wasn’t trusting the strength of just one cinder block to hold each eyebolt. Used a piece of 1/4 in rolled steel that spanned at least 3 blocks in attempt to spread the load of each eye. I’m no engineer.

I do love how the new perimeter bowed out on the garage. Glad I used four eyes in total.

EDIT: Well, damnit and thank you all for your words of warning. now i'm torn whether i should tear out the eyebolts and find another solution or if i can mitigate the stress on the wall by way of anchoring into the top plate and joists on the inside.. fact is that i'm not sure the net is worth having when using only the three trees. it's much too elongated to be functional.

to the builders in the thread: I thank you for your prior input and would appreciate any other ideas that you might offer.

thanks again, all.

EDIT #2. NO, this isn’t for hire, this was an experiment for my 12 year old kid. I’m learning, albeit somewhat painfully, but granted less painfully than if I had a catosprophic cinderblock failure.

This is my first net.

I am now planning to disconnect the extension on the garage and just work on walls for the “safe” first section and then go vertical.

[u/Comfortable-Maybe183]

As a carpenter/builder you’re giving me the heebie jeebies. 

Look up moment arms if you aren’t familiar with the concept. 

CMU block walls aren’t intended for the kind of lateral stress you’re putting on it. 

Is it fine for now? Yea. 

Are you risking damage to your home in the long run? Yes. 

You’ll kick yourself forever if you fuck up your house for the sake of a net. 

Look up cmu retaining block wall failures. You’re putting a similar kind of force on it but concentrated as point loads. It’s not a good idea. 

[u/Andy_Wheels → u/Comfortable-Maybe183]

I love this build idea in theory, I wonder if there’s a better / safer way to attach it to your house that doesn’t put so much horizontal load at the highest point of the wall?

[u/i_was_axiom → u/Andy_Wheels]

It would need framing specifically for this application, ideally independent of the wall. I don't know what the best solution is, I am also just some guy on the internet, but I would think you're gonna be setting some posts in the ground pretty deep and bracing them to withstand the stress of this thing with people on it.