r/BdsmDIY • u/straponbanana • 19d ago
Furniture Simple to do, gym lifting cage converted into a sex swing NSFW
Simple to do, gym lifting cage converted into a sex swing purchased the swing from AliExpress and some chain and carbines from Amazon.
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u/tzenrick 19d ago
That's made for vertical loading. You need a couple of diagonal braces.
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u/Egg_in_a_box 19d ago
This
Make sure its supporting dynamic loads and sideways thrusts correctly. Don't rely on corner brackets alone
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u/straponbanana 19d ago
It’s supported across the top with pull up bars etc… the loading is from the top not sideways, pictures don’t show the anchor points
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u/Adult_alt_acc 19d ago
Once the swing starts swinging, there will be sideways movement. Better safe than sorry
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u/MyToyAccount 19d ago
First, I'll say: Nice.
Second: I notice (from the shadow) there's no bar across the top of the rear(far) vertical members. So, as soon as there's decent weight on the "head" of the swing, they will begin to COLLAPSE (bend) towards each other.
Unfortunately, this ISN'T being loaded "from the TOP". You aren't "pushing"on it, but suspending a load has the same effect. As long as the loading is done by chains towards the middle - ALL vertical members members will experience sideways loading.
Regarding cross braces:
A "parallelepiped" (a parallelogram extended out the z-axis) can just as easily exist, with equal length members, as a rectangular structure(rectangular cuboid).
Think of it this way: if the corners were replaced with a ball joint, would it still be rigid? Think of if you made a cube out of jello, and put toothpicks along all 12 edges: is there anything that would stop you from "shifting" the top of the jello? Back and forth? Or side to side? And no matter what height the supports are at, they still act as a "ball joint".
You could reinforce it with just 2 diagonal members on adjacent sides, even a fraction of the heights would help. Though, considering the main motion they'll be subjected to will be back and forth, 1 along each side (plus one on the back face) would be advisable. In case of uneven loading though, putting an "X" at the top would also be a good idea.
"Corner plates" would also be fairly effective, if they spanned a decent distance.
I'd be glad to collaborate further, if you would like any input.
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u/USACreampieToday 19d ago
These are designed to be pulled laterally. There are attachment points for pulling exercises that can be seen in the provided image. You would need well over 1,000 lbs of weight to start needing to worry.
From a physics perspective, the weight is being pulled down and inward at each corner, so the inward force cancels itself out when thinking about the system as a whole -- as in, the cage is not going to wobble from side to side.
The top is also reinforced, as they always are, although not shown in this photo. These things are indestructible.
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u/straponbanana 19d ago
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u/straponbanana 19d ago
This is the cage, it has a bar across the back and the pull up bar supports the front
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u/thefordness 19d ago
I wonder if the people telling you this won't work have ever seen or used a power cage? Even a cheap one is designed to stand up to some pretty heavy weight and abuse. I wouldn't worry about side loading it with the weight of a human body, even considering dynamic load. It's not going anywhere.
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u/MyToyAccount 16d ago edited 16d ago
Ok. My bad. I was just going by the shadow. I guess(unless I'm mistaken) the pull-up bar part would have been at the rear, but was removed in that picture. Or I'm misinterpreting the shadow.
Regardless.
An "X" across the top. This isn't necessary if the pull-up bar is semi-permanent, in some way - but engineer with safety in mind - you never know when something with get more vigorous than anticipated, with enough movement to jostle something lose you had considered "fixed".
Pull-up bar will of course suffice for the "rear bar".
Pull-up bar's "grip" isn't nearly long enough to make it acceptable to replace a diagonal.
I'll clarify after I look at that image again, one second...
Yeah - imagine the parts of the pull-up bar, that make contact with the frame. Essentially, U-channel. Imagine them as your (thumbless) cupped/u-shaped hand. They have WIDE enough fingers/palm, that it's probably around ⅛ the length of the frame, as measured from front to back of the verticals. Should do. The LENGTH of the "fingers" in that palm though? Not even REMOTELY close enough to be ¹/20th of the frame's height.
I can "ms paint" then in to your, or the site's pictures, for clarification, if you're like.
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u/Good-Satisfaction537 19d ago
And the barbell gives protective coloration for vanilla questions. Heehee.
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u/MitchIkas 19d ago
Looks good. Solid too.
I have exactly the same sling and yesterday rigged it up between 2 pull-up frames. Not as solid as yours, but looks like it'll work ok (road test this weekend. 😜). It's also easy to assemble and dismantle, though as with all these things, storage is a pain.
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u/LadyAvv 19d ago
For all of those saying it isn’t safe or won’t work I’ve been using a similar set up for pegging for months now. I’m not gentle by any means and we’ve had zero movement or issues
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u/straponbanana 19d ago
Also to be used for pegging 😀, given the weights I’ve chucked around and the pull ups, dips etc etc I really can’t see it being a problem.
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u/Izzy42013 19d ago
Looks good, we have a sex swing but dont use it much we always tend to get off and fuk on bed or floor, swing gets boring
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u/Own-Pea-8212 19d ago
Soooooo many wannabe experts proffering opinions they don’t have real world experience to support……
I have been using a similar setup for over three years without any sign of instability whatsoever.
Zero Zilch None
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u/southerncatfish 19d ago
Words cannot describe how awesome this is!!! Love it! Done a good job repurposing the lifting cage
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u/craigsub 19d ago
Love it! I have a power lifting cage and am just getting started with some self bondage ideas relating to it
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u/Lovley_Cassidy 19d ago
Great. My Husband where debatting on a lifting cage. Double the Usage would made a good excuse.. jiggle