/diy/ - Do It Yourself

>>1598958
>192 holes to be drilled, and 96 bolts, 96 nuts.

The fuck? I count all of 32.

>considering that THIS is how most overhead hoists I've seen and used are like, mine is far far from a fucking death trap, holy shit

Because it's a predictable, efficient design. The stress on the main beam is trivially easy to calculate. The stress on the supports is trivially easy to calculate. There are no potentially unaccounted-for forces acting on the structure when used properly (most critically, that the hoist be in line with the load's center of gravity). A fairly accurate picture of its capacity and safety factor can be derived with a high level of confidence. >>1598824 is okay (not good, okay) for the same reasons, with a few caveats that shouldn't matter for a 1000lb load.

Most of what you've posted is sketchy specifically because they produce stress concentrations in ways that do not sit well with anyone keeping tabs on them, or may allow the structure to shift enough to completely fuck itself up while it's holding a weight most easily measured in tons. They're PROBABLY fine. But "probably" is the last thing you want to hear when something breaking means, at best, damaging expensive equipment and, quite easily, someone being grievously injured or outright killed.

I mean, it's only your ass on the line, I assume. So go nuts, but realize there's good reason nobody is encouraging this kind of "yeah, that looks fine I guess" attitude when it comes to rigging.