Tsu Dho Nimh's Profile

I forwarded the photo of the hanging bunks to my SO … his response was not “ooooh, look at the beds” it was “OMG! That’s the WRONG KNOT for hanging things one’s children will be using!”

The overhand loop that is shown clearly in this picture is not meant to be a load-bearing knot. It WILL work loose under a load, especially when the loose end is clipped short and left frayed like this.
http://thebumpercrop.files.wordpress.com/2010/10/dsc_02502.jpg?w=490&h=453

He says that a knot known as a “figure eight followthrough” is the best knot for the bed. It is an easy knot, and the one that rescue workers use for for tieing weights (themselves, victims, equipment) onto lines because it is really secure.
It’s a prettier knot, too, when you have the loops laid correctly.
http://www.chockstone.org/techtips/f8knots.htm
http://climbing.about.com/od/climbingknots/ss/Figure8FollowTh.htm

I'd have to see how the other end of the rope was secured to be truly happy with these beds for anyone ... if the top anchor gives way it could be ugly. It's what engineers (like my SO) ca;; "catastrophic failure". Things look great and then suddenly BOOM!

An anchor bolt through a correctly sized stud, with a large washer to prevent pull-through can hold an amazing amount of weight. Done wrong, it can pull the whole ceiling down.