This is a reference sheet I made for geodesic dome parts. The strut lengths are apex to apex, so, if you're using "star brackets" you'll have to figure in that additional length if you want to know exactly how big it's going to be but it's never been an issue in anything I've done with it - assuming all of the brackets are the same and the struts are all attached according to the same dimensions.

I've since become enamored with the RanDome which is just a hoot, but this is a pretty handy reference to have on hand, nevertheless.

<p>If you search &quot;geodesic dome math&quot; you will find references for more serious dome building. <a href="https://simplydifferently.org/Geodesic_Dome_Notes?page=1" rel="nofollow">Here's one possibility</a> - </p>
<p>I noticed a couple months ago the Domerama site was unavailable and still is unreachable. Desert Domes still has a good dome calculator though..</p>
<p>A lot of the DIY dome information is disappearing. Gather what you can, because it's pretty much been commercialized. Someone even patented a connector design that was pretty popular, years ago. It's crazy out there.</p>
<p>I agree, one reason it's becoming commercialized is due to difficulty for the average DIY who wants to build a dome. The joints are the big problem and the DIY guy just doesn't have the tools for joining the strut ends at the desired angle. I have a solution to that if you stop by my instructable page. All that's required is a 1/4&quot; drill and knowledge of the strut length needed for the size dome you want to build. The conduit is available at any big box store. </p>
<p>A patent? Really? You can't stop evolution, bubba. There are probably a thousand people, just on this site, that could START with your idea and evolve it into a thousand OTHER ways to get the job done. Cheaper, quicker, easier and even more flexible, effective and reliable ways already exist. A patent is useless against evolution. Patent law doesn't cover evolution. It doesn't even TRY. All a patent does is give you the right to spend every dime you have trying to police the whole world to protect one old idea. ONE. Save yourself a lot of grief and move on. Invent something else. Then something else again - that's where the happiness is. You're an engineer - there's no happiness in trying to play with big dogs. Big dog fun is all ABOUT trying to stop evolution long enough to make some money. It's extremely expensive and fails FAR more often than it works. Making is the opposite of that. Making IS evolution. Engineering IS evolution.</p><p>Save yourself the grief. OR not! It's your choice.</p>
<p>Ah ha, you must be one of those folks that would let something evolve from nothing. The easy way out.. ie: an evolutionist.. Tell me, what have you built lately? </p>
<p>Currently I'm working on &quot;vertebrae&quot;. As in the elements of a spine that will approximate the human spine. Adjustable by separating on shockcord, placing and then held in place by friction. Yesterday I designed an apron for those who walk dogs at a no kill shelter nearby. It has pockets that can't get snagged by claws as the over excited (and large) dogs jump on their walkers. You?</p>
<p>I should have said &quot;that approximates the human spine in range of motion&quot;. Not like a model of a human spine.</p>
<p>Not sure what you think &quot;evolution&quot; is but everything evolves. Including ideas. I'm an explorer of ideas. Which leads to the discovery of new ideas.</p>
<p>This is very handy and useful. Would you happen to know of a good reference for the cut angles needed? Thanks for posting. </p>
<p>This is just a workbench reference for playing. Domerama has a whole page of calculators, <a href="http://www.domerama.com/calculators/" rel="nofollow">HERE</a>.</p>

About This Instructable



Bio: Learning is a perfectly legitimate "life purpose" but I'm an explorer. "Knowing" doesn't interest me. Exploration and discovery does. There's always more ... More »
More by GenerallyOdd:MechGeeks Life's a Hoot 10 Uses for a Wash Bottle 
Add instructable to: