Net has four-fold symmetry. Quaddome has four-fold symmetry.
That *may well* work, although mapping a square on to the surface of a sphere is fraught. Might I suggest a cardboard-and-string model quaddome and net, and then take some photos for us? I don't think anybody's ever tried it, and that's an afternoon's work and will be very informative. It'll either just kinda work, or just kinda not. I'm not sure how the net will behave. I'm guessing you'd stretch it out one-corner-per-side, basically. V> On Wed, Jul 3, 2013 at 8:10 PM, Vladimir Khodel <[email protected]> wrote: > If you can calculate where straight lines over your roof profile would go, > I'd use 1.5-2" nylon strap-type tie-downs - as many as you think you need > based on the symmetries of your roof. You can get quite a bit of tension on > these things (1000s of lb, don't :)) and it makes overall structure more > rigid as well. > > With stretch hexayurt it was simple - 2 vertical straps over the roof > ridge and we were done: > > > https://plus.google.com/u/0/photos/105749720803217667411/albums/5790238250113787985/5790238860631299362?pid=5790238860631299362&oid=105749720803217667411 > > Little patches with guiding loops (blue on the photo) help to keep things > in place when humidity causes straps to sag (e.g., in the rain). Of course > I also use straps in horizontal plane for unparalleled stability, but that > requires a beefy door (documented at http://www.appropedia.org/BFD_mod). > > Net seems problematic in achieving any kind of uniform tension :) but I > guess you can try to fit it to the roof shape first by cinching loose parts > with some masonry line? Those come in some awesome colors, so it can look > pretty nice. > > Good luck! > > Vladimir > > > On Wed, Jul 3, 2013 at 11:31 AM, Jacob Rodriguez > <[email protected]>wrote: > >> So, as I contemplate how to tie down a hexayurt (specifically a quad-dome >> yurt), I'm wondering which approach would be more secure. I'm not using >> BFT, so I'd rather not use tape as a tie down option. >> >> From what I understand, the "rope ring" is a rope tied to itself to form >> a circle and then thrown over the top of the yurt. Then, rope lines are >> tied to that "rope halo" and anchored to the ground. Seems simple enough. >> >> With the net approach, I'm thinking of using a large square camo net >> (basically a fishing net with wavy fabric attached). This would have it's >> four corners tied to guy lines anchored to the ground. The net wouldn't >> really be big enough to extend beyond the structure of the yurt, so as to >> avoid being a sail. >> >> In the rope ring scenario, it seems that there is very little surface >> area holding down the boards or holding them to each other, but most of the >> reflective surface of the board is left exposed to reflect light/heat. I >> believe this idea has been playa tested with success. >> >> With the net, it seems that there is much more net surface area to hold >> more of the yurt together which I'm assuming could only help in high winds. >> The netting would block some of the reflective surface, so I'm not sure if >> that's good or bad yet. Since a quad-dome has many more parts, having more >> of them covered/held together seems like a good idea. The downside could be >> that the net itself will act as a bit of a sail in some cases. >> >> Basically, I'm trying to build this thing to withstand "Condition Alpha" >> or a flash flood type rain, and I'm wondering what everyones thoughts are. >> >> Thanks in advance. >> >> -- >> You received this message because you are subscribed to the Google Groups >> "hexayurt" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected]. >> To post to this group, send email to [email protected]. >> Visit this group at http://groups.google.com/group/hexayurt. >> For more options, visit https://groups.google.com/groups/opt_out. >> >> >> > > -- > You received this message because you are subscribed to the Google Groups > "hexayurt" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To post to this group, send email to [email protected]. > Visit this group at http://groups.google.com/group/hexayurt. > For more options, visit https://groups.google.com/groups/opt_out. > > > -- Vinay Gupta Free Science and Engineering in the Global Public Interest http://bit.ly/gupta_arc <http://bit.ly/gupta_arc%20>- the Gupta State Failure Management Archive http://bit.ly/gupta_ark - or see it directly on Archive.org http://hexayurt.com - free/open next generation human sheltering http://hexayurt.com/plan - the whole systems, big picture vision "In the midst of winter, I finally learned that there was in me an invincible summer" - Albert Camus Twitter/Skype/Gizmo/Gtalk/AIM: hexayurt UK Cell : +44 (0) 7500 895568 / USA VOIP (+1) 775-743-1851 -- You received this message because you are subscribed to the Google Groups "hexayurt" group. 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