Rethink Your Life!
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The Work of Art and The Art of Work
Kiko Denzer on Art
Fwd: Re: [Cob] dirt bagsRoselle Milvich rosellewind at yahoo.com
Mon Jan 2 18:52:04 PST 2006
whoops, I think I just sent this to Nicolas. --- Roselle Milvich <rosellewind at yahoo.com> wrote: > Date: Mon, 2 Jan 2006 18:49:45 -0800 (PST) > From: Roselle Milvich <rosellewind at yahoo.com> > Subject: Re: [Cob] dirt bags > To: Nicolás Echániz <nico at rakar.com> > > Hi Nicolas, > > > I think a circle is the strongest shape without > gravity. If you look in wikipedia under "arch", it > says "The parabolic and catenary arches are now > known > to be the theoretically strongest forms." Its a > pretty good article. It has sketches of different > types of arches which is interesting to look at for > ideas on window and door openings. > > The "dome" entry doesn't give as much information. > I'm not sure if the math for the arch would directly > translate into a dome. The ending lines of a > parabola > do not end vertically, but slightly out. Into the > wall if it is a window. Should it end vertically to > transfer the weight directly down? If so, would > half > of an ellipse be the strongest? > > > Just for fun.... > I just learned how to draw an ellipse. Its pretty > cool. You use two thumbtacks for the focus points. > Stick them apart from each other on the paper. Tie > a > string between them that is longer than the distance > between them. Then pull the string taut with a > pencil > as you draw. Ive got equations if anyone is > interested. > > > Roselle > > > > --- Nicolás Echániz <nico at rakar.com> wrote: > > > Hi, > > > > I guess this is not exactly the place to ask for > > help, as dirtbags > > buildings are not exactly cob, but I can't think > of > > a better place to ask. > > > > I'm planning to build a dirtbag dome (5m diameter) > > and I need to know > > what would be the ideal shape (curve) for this > kind > > of corbelled dome. > > Does anyone here have relevant information on this > > subject? > > > > Thanks in advance, > > > > Nico. > > > > > > _______________________________________________ > > Coblist mailing list > > Coblist at deatech.com > > http://www.deatech.com/mailman/listinfo/coblist > > > > > > > > __________________________________ > Yahoo! for Good - Make a difference this year. > http://brand.yahoo.com/cybergivingweek2005/ > __________________________________ Yahoo! for Good - Make a difference this year. http://brand.yahoo.com/cybergivingweek2005/
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