While picking up a brilliant tip today about sheathing rebar with 1/2" poly pipe (a potential roadside score) to use in geodesic dome construction, I remembered a recall I stumbled across while picking up my own used climbing dome materials:
https://recalls-rappels.canada.ca/en/alert-recall/lifetime-geodome-climber-recalled-due-chemical-hazard
It's blue and red
The other colours seem to be okay because it's the paint on the dome that's the problem
The second image upload in my post is the recalled dome.
I found this available in the USA as well as Canada, perhaps elsewhere and Costco was selling it as well at some point so it's probably available used all over North America.
Not really a big deal if the structure is getting completely buried but in my case the purpose of the dome is as a well cover
Anyway my tubes are also from lifetime and they are this one:
https://www.tourgosolution.com/dome-climber/metal-dome-geometric-frame-kids-metal-climbing-domelifetime-geometric-dome-climber.html
It's about 9-1/2' wide, 5' high, an adapted dome with a square pyramid top with essentially three
different lengths and some structural reinforcements
Both my two identical domes were dirt cheap and slightly damaged
I can't show you pics of the assembled globe I made out of 2 domes, because they are currently in data hell but as a half sphere, the bottom struts are prone to damage, but I doubled up in places, and made myself a globe (minus the square pyramid below, which was used to double up the top, add a larger connecting bar like you would see on a car battery housing and added a taller pyramid to the existing one to make a spire.
The top takes the load bearing, compression I think, the sides do the expansion sorry not engineering terms, and if it doesn't get dismantled for winter while covered, hopefully the spire will help with the snow load
Anyway, forget a door in the Pentagon, the igloo is the better idea: access from underneath
Pop it on top of something you get enter from underside (scaffolding in my case)
I hope to build forms to pour concrete in the hole that holds the 420' well, overkill since the water table was sitting at 35' in November, but anyway, build a small structure onto that and reassemble the dome on top (it's stored in sections)
So I get a modified mushroom on top of the well, with a square footage of under 100, plus it's a well cover so no permit required.
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