I've been seeing a few of the indoor hang threads and decided to give it a go. I am in the process of finishing my basement/garage into an office/mancave and I figured I could put the anchors in the header joist before I finished the ceiling.
I picked up a couple of 1/4" cold shuts from tractor supply and used #10 2" Spax screws.
And for the webbing I used some climbing tubular webbing from REI that I had laying around, tied with a water knot.
I went with 2 anchors at each end for redundancy and to help spread the weight. I used the iPhone hammock hang calculator and the forces came out to 236.8lbs of cord tension and 189.1 shear force on a hanging weight of 285lbs which is what my hammocks capacity is, using a 37° angle. Since my points are in the ceiling and my angle was greater, this also helped reduce some of the forces, and provides a comfortable lay for me. I weigh 275-280 and I have been hanging in it for the last few days and have not had any issues. I've bounced in it to see if it was going to give and have not experienced any problems.
For suspension I'm am currently using my eno slapstraps pros with Dutch speed hooks. There is some stretching of the straps and that may be contributing to handling the bouncing better. I'm not sure. If any of you have any theories let me know.
I'm wondering what the best way to do a detachable suspension system would be since I am going to be insulating and covering the ceiling. Any ideas? The ceiling is going to be galvanized aluminum when it's done.
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