On Mon, Jun 27, 2011 at 6:13 PM, Brian Chabot <[email protected]> wrote:
> (Comments interspersed below...) > > On Mon, Jun 27, 2011 at 6:17 PM, Vinay Gupta (Hexayurt Shelter > Project) <[email protected]> wrote: > > >> 1. Is there an "ideal" thickness of Thermax HD to use? I will have > >> significant snow loads to deal with in the winter and the more > >> insulation I can get, the better. But the 2" boards are already $53 > >> each and sound like they will be more than a handful to manipulate on > >> site. > > > > 2" sounds pretty reasonable. 1" is warm, 2" will be warmer, and stronger. > > At $53 a board... OUCH! > > > Remember these are foam panels. I'm not *at all* sure that even a > Pentayurt > > in 2" thermax will survive three feet of snow - you're talking about a > ton > > or more of snow over that roof area... > > I still want to see this tested. The even distribution of snow vs. a > weight in any one point is the key. In icy or "falling snow" > conditions (such as under eaves or trees), no I don't think it would > hold up, but natural snowfall? More likely. > *Check out the manufacturer website / specs. Perhaps even ASK for the engineers datum. It will show the PSF for different situations.* *I can help with my timber framing knowledge, but not a "licensed" engineer... but our two towers stood 60 mph wind storms last year and didnt wiggle!* * * > > >> 4. I happen to have a concrete slab already in place where I plan to > >> build this... Any suggestions on anchoring? I have a friend who is > >> well-versed in conventional building techniques, so I know that he can > >> help me drill the slab and put in anchors - just tie to these instead > >> of using stakes, etc.? > > > > Yep, that's how I'd approach it. > > Also keep in mind the cold will get inside through the concrete floor > unless you insulate the inside. > > With showload, the hexayurt design is likely to stress most along the > seam between the alls and roof panels. I'd run a couple layers of > tape along this area plus an overlap above and below, just to make > sure. > *Since you have this concrete footing, I'd Suggest "sill plates"* *basiclly you go a rent a "HILTI" gun which shoots very strong nails into concrete with a cartritdge like a gun. Yeah....* * * *So you outline the footprint of the hexayurt in Pressure treated 2x4's HILTI nailed to the conctere. You can then place anchor points where ever you like.* * * *The other main improvement is increased rigidity. The snow on the roof of the dome will cause outward pressure at the base.* *the weight will be transmitted from the angled rook, into the upright boards, and it will want to "Splay" and deform , eventually the footing slips and you have a collapse.* * * *If you put in sill plates, and build the foam panels inside this footprint, it is like having foundation .* * * *PS concerete is notoriously wet and slippery in winter, so the sills arouns you hut will also prevent it some moving around in the wind, etc.* > > > Not trivial *at all* Robert. I'm only sorry we don't know the answers! > > > > But please write up what you do and what you learn, and we'll get the > whole > > thing figured out over time, a building at a time. > > As those on this list can attest, I've been trying to get a hexayurt > (or pentayurt) set up in New England for destructive testing under > snow load to see the limits. So far, we simply have not been able to > afford to buy panels we are reasonably certain won't last. Even the > 1" is un-affordable in the current economic condition of those I've > been able to get in on it. I have had an offer for tape and I found > three locations, from central MA to northern VT, but no panels... > *I suggest: 1. develop a cost analysis. for example how many panels, how much donations, etc.* * * *2. Start a project on http://www.kickstarter.com/ Most Burning Man art projects get their funding this way. you could raise a few hundred dollars. Say "this is infrastructural testing for future Playa built insulated dwellings." some corporate sounding language like that, and i bet you have a few people sign up.* * * *3. Talk to the MANUFACTUIRER.... they may support a "trial of their product in a new use, and to develop more enviromental uses and BLAH BLAH BLAH" Vinay could probably help with this language.* * * *To the company that makes this stuff, we are talking a pallet of product, 20 sheets lets say?* *so to PROVE their product would work, etc gives them a couple things, a. braggin rights that they are doing something "good" b. a new market to market to (especially for small sheds, outbuildingd, etc) 3. build a new customer base by demonstrating effeacy, and thus having more people pay "full price" for the material.* * * *Aluminet, which is now a staple for many playa camps,l was not much of a consumer product. it was for specific insulating issues in industry. Now, highly sought after , at least in the burner community.* * * *Take a lot of pictures, be effusive in your praise, or honest "it didnt work" and then provide press releases to anyone you can think of.* > > > Brian > > -- > You received this message because you are subscribed to the Google Groups > "hexayurt" group. > To post to this group, send email to [email protected]. > To unsubscribe from this group, send email to > [email protected]. > For more options, visit this group at > http://groups.google.com/group/hexayurt?hl=en. > > -- You received this message because you are subscribed to the Google Groups "hexayurt" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/hexayurt?hl=en.
