Dome Calculations 

"and we'll pretend it's nothing" and yet there's critical math involved.... LOVE THIS!!! freakin' brilliant. -Got a HUGE project? break it down to individual units and ask yourself "Is this achievable?" Your persistence and ability to improvise with what is available is inspiring. THANK YOU.

That was so practical, and clear. Thanks for the great example, I can see how this method could be applied to many other shapes even more complex than a dome.

would it be possible to have a structural demonstration of the polystyrene/cement blocks? i'd love to have a better understanding of how tough they are!

Jamie makes it look easy.

Thanks for the details. So often I want to ask you questions about your thought process during a project, but also recognize doing so is not conducive to your desired achievement level.

Thank you Jaime. Been waiting for it. I thought you did it with equations but you wet graphically like the Greeks. You also gave the piece some curvature.

ahhhhhhh so nice to see those pipes geod. re enforcing it from the inside.....bravo J'

Another great video 👍

This answered all my questions.

Thanks Jamie, so much easier to understand/relate the math to real construction. Thanks

Thanks I've built 5 round cottage in the Philippines now ..Very well Done there 👍

This was the best explanation... You are a teacher Jamie. I have had people (bosses) try to explain much simpler things to me in such complicated ways that I thought they didn't know what they were talking about.. Hahaha thank you man.. I seriously would love to work with you... Be your helper for a while.... I think we would have a great time. Thanks again. Rolfie

I love math! It was fun trying to stay one step ahead of you as your worked through the calculations :P

Thanks for answering this for me..

Very good content here.

thank you so much for this video.

Way cool man, I wish there were math problems like this when I was in school. Everything was so abstract and boring. Also, your kids are good at drawing horses/unicorns!

That was cool.

Thanks

Yessss!

Thank you for that

I tend to go with triangles, when I have to lay out a dome structure, only because it's easier in my field (steel fabrication) to cut parts on plate metals, and fit them together like puzzle pieces, when you're by yourself, on a scaffold.

Thank you for the explanation. The math is really simple. It is being able to visualize it in your mind in 3d that is the tricky part. If you use diamter instead of circumference, you would get less than optimal results.

Working with mm (and sometimes fractions of mm) in furniture design and construction I find this approach both satisfying for its simplicity and chilling for its inaccuracy. Since the plates are straight and not curved there is no need for introducing the height of them as parabolic curves, the math to calculate the top width is simple enough, and for inaccuracy he just make them a little too large and cut off the final piece so it fits. Brilliant. However, for improved accuracy I'm not sure if I'd used a carpenters right angel with quite course measurements. Possibly his real drawings where done more carefully, but he could also have used a simple CAD program like SketchUp or Fusion360 (the tools exists so why not use them), and accurate measurements of each circle's diameter would have popped out. But all in all, Jamie is a super teacher ... so thx for the video.

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I was at first confused why 30 units was shared between layers... but of course it's because you're using forms. Thank you for the math noodles.

I love this. I love maths. I now want to build a dome - maybe not out of concrete though. 😀

Ever thought about mocking things up like this in fusion 360? I’m usually need things much more tangible when making designing stuff as it helps me feel much more organized, but fusion is easy and free and the preciseness of it helps me make better sense of things at times.

I used to make cabinets for a contractor in LA. Your drawings remind me of the drawings he would give me at times. Luckily he was an artist so the drawings were good enough. Otherwise the drawings were from autocad.

Agora sim entendo os seus calculos hugs.

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Hi jaimie ,can you please suggest for the surface area of that dome. Hope you will suggest shortly. Thanks

Your mechanism for "hanging" them at the right angle is clever, but did you precisely set the angle to install each panel at or was it by eye? How do you even measure the angle on such large, hard to reach parts?

Did you perform these calculations for two sets of diameters, representing inside and outside faces of the panels, and then use the small difference to set the draft angle of your forms? Ideally, each panel would be a trapezoid in both plan and section, correct? Or did you just form the edges at 90 degrees and use your grout to fill the small wedges?

Feels good being a member... Thanks for the video J....

Noodle units.

Interesting. I'm surprised you didn't specify the number of pieces in each row so that you wouldn't have a fractional piece at the end (is there a reason I'm not thinking of?). Like, in your example, just pick 50 on that first row because it will be "near" the 30" target you set for yourself. And then, no, they won't be 30" wide. And then the next row's bottom won't be the same width as the 1st row (but I'd offset them in a brick pattern so that wouldn't be obvious). I guess my suggestion doesn't allow for clean lines

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Maybe I missed it, but why did you decide to reset the base of each row at 30 inches? When you built your smaller fiberglass huts you made forms that looked like long 'banana peel slices' where the fat ends were the base, and the skinny point was the top of the dome. Would this method of making essentially 1 row of long banana peels going around for the dome been too heavy?

I was not good at math. SO, a ship's mast centered with intended height of dome marked & attachment ring affixed . . . . attach strings to ring & pull out to current dome's position to 'mark' individual cardboard pieces as templates for the next set of cement/composition sections. This would give you the angles needed for the trapezoids.

It's totally sweet you calculated it but it could have been done with string and a tape measure or really just string .. Again I think doing the math is extra awesome 👍 just saying if a person can't math or doesn't want to there are other ways to get the structure geometry right with less math as long as stress load can be accounted for which is probably something jerks are trying to meme right now... Good work Jamie.

How much for da dome ?

I identify as an Imperial Noodleist.

I would not only rely my math on "manualy" measured values like this. You can find the new diameters with math only. As the dome is a half circle, you know the entire circumference/2, but we need the new "tile" height, as the tiles are tilted.

مع اني مافهمة شي لاكن في اشارت تدل على تمكنك من العمل🎉

there was a much easier way just using ratios.....

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