Valid concerns. And I do not have answers. Have wondered about its load-bearing ability as an adhesive. Do know the Chumash were have said to have used it to waterproof and help bond the canoes they rowed between the mainland and the Channel Islands.
We do have really powerful spring windstorms here. And occasional extreme snowloads. (4' in 2007. VERY rare. No idea if the 4" polyiso panels could stand up to that weight.) The H18 essentially is a tension structure. If the tension ring is adequate (and I may do both top and bottom ones), even if the bond on a panel or two broke, wouldn't the building tend to hold together? This is an experiment. I remember back in the very early days of this group someone built a model and reported that it failed under winter snowload. But they provided few specifics. No idea what thickness of polyiso they used. And someone else reported that an OSB version failed under snowload. Again, no details on how it was constructed. So ... I am aware the thing may fail. And I am aware that I know very little about construction and engineering. Suppose I will know a little bit more when this project is done. And even more after a few years if it manages to still be standing and livable. And ... I expect that I will innovate a number of modifications and fixes along the way if this thing holds up well enough to allow that. On Tuesday, August 15, 2017 at 11:15:56 AM UTC-6, Wolf wrote: > > Using asphalt as a glue is a fascinating idea. The first caveat that comes > to mind is the potential britlleness of cured asphalt under cold extremes. > Yes I see you had a test piece that stayed together, but did you have it > under load or apply dynamic stress to it when it was exposed to your > coldest outdoor temperatures? I am assuming your yurt will be exposed to > buffeting winds, heavy rains, possibly snowpack. Will asphalt or coal tar > maintain the shear strength necessary to keep your yurt upright or will it > crack and allow joints to fail? > > Likely there are reasons why tar isn't used as a glue for building > construction and epoxy is. <snip. > -- 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 hexayurt+unsubscr...@googlegroups.com. To post to this group, send email to hexayurt@googlegroups.com. Visit this group at https://groups.google.com/group/hexayurt. For more options, visit https://groups.google.com/d/optout.
