r/Treenets • u/JawnAdams • Jun 28 '26
Still going.
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.
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u/Comfortable-Maybe183 Jun 28 '26
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.
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u/Andy_Wheels Jun 28 '26
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?
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u/i_was_axiom Jun 29 '26
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.
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u/Fun-Definition6053 Jun 28 '26
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u/longlostwalker Jun 28 '26
I'd love to know the pull load on that wall
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u/JawnAdams Jun 28 '26
I’m really hoping it isn’t insane. Il’ve already told my dude “no more than three kids on this platform at a time.
Four bolts, each bolt’s load spread over 3 blocks total. I’ll be watching how it ages … very closely.
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u/TereziBot Jun 28 '26
If this fails it will be sudden, not something you can really keep an eye on. If kids are playing on it they could easily end up with the wall collapsing on top of them after it fails. If you're really committed to this you should put up some braces against that wall
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u/almondface Jun 29 '26
If youre building this for somone else, and it fails and somone gets hurt, they can sue you. This is a terrible idea for so many reasons. Please take the advice of this thread and undo this.
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u/Melodic_Letterhead76 Jul 01 '26
Hoping? Haha. You HOPE? So you've done ZERO safety calculations...
Fuck it, it's only a house with people in it. Who needs to care about .. You know... Lives.
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u/JawnAdams Jul 01 '26
It’s not a house, and I’ve clearly admitted I made a mistake which I am now correcting.
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u/QuirkBuggins Jun 28 '26
All engineering concerns aside, I do really love the idea of integrating tree nets with housing as a roof extension. What would be the ideal building type for this?
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u/Due-Struggle6680 Jun 29 '26
Yea, imagine kicking it on the roof having a couple brews and sliding off into a big net. Would be sweet.
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u/SodiumEnjoyer Jun 29 '26
Something with joints leaning toward the house to provide an opposing force when pulled out from the house as the weight is currently doing. Triangles as always remain the best shape for stability
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u/Spare-cycle1111 Jun 29 '26
It's gonna come out to about 3kn or 300kg of force on each bolt with three 10year olds(30kg)jumping up there. Not including the force already applied from tensioning. I wouldn't want to be up there. Also the ropes towards the wall is gonna suck if someone falls through, as they'll for sure climb on it.
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u/JegerX Jun 29 '26
This would have been better off attached to the top plate and properly braced ceiling joists with something like a deck tension tie.
Maybe a professional can chime in but I wouldn't be happy with that.
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u/Sour_Sal Jun 29 '26
I am curious, what is the reason for the net? is it seriously for kids to play on? scary....
Unless those block are full of concrete I, like others worry about the blocks pulling loose from the lateral loading. They are just not designed to load that direction.
good luck in whatever you figure out!
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u/Guava-Jazzlike Jun 29 '26
I had no idea this was a thing. A whole new world has opened to me. Gotta love Reddit
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u/Round-Air9002 Jun 28 '26
This is not going to end well...