Timeline for How can I make the supporting pillars of an underground city less obstructive?
Current License: CC BY-SA 4.0
9 events
| when toggle format | what | by | license | comment | |
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| Apr 24, 2020 at 6:09 | comment | added | corsiKa | @ruakh No, I didn't. OP is trying to get RID of the columns. Make them LESS obstructive. Cypher's suggestion, while neat, makes them BIGGER. | |
| Apr 23, 2020 at 23:49 | comment | added | ruakh | @corsiKa: *shrug* You objected to cypher's proposal on a specific mistaken basis. I was just pointing out your mistake. I don't mean to suggest that cypher's proposal has no other downsides. | |
| Apr 23, 2020 at 22:15 | comment | added | corsiKa | @ruakh Okay. That's not relevant, but okay. To get back on-topic, it's unlikely that a shell outside the building will be stronger per unit cross section than solid rock unless they use metal which probably be prohibitively expensive for a very small gain in space. Unless you're saying we REPLACE the pillar with a skyscraper that, being very large, has a huge cross section - but it seems the columns are already a bad thing, so I think we should avoid making them even bigger. | |
| Apr 23, 2020 at 21:57 | comment | added | ruakh | @corsiKa: The pillars aren't needed because the cave wall isn't strong enough; they're needed because the cave ceiling isn't strong enough. (To see this, try holding a Kleenex by its edges and piling stuff onto the center. The Kleenex will break long before it gets too heavy for you. But if you support the Kleenex in the center as well, it can support more weight than if you only supported it at the edges.) | |
| Apr 23, 2020 at 20:28 | comment | added | corsiKa | @ruakh Well I mean it's a cave, so it already has a cylindrical shell around the perimeter - namely, the cave wall. Since the pillars need to exist, presumably that cave wall is insufficient to hold up the ceiling. | |
| Apr 23, 2020 at 17:44 | comment | added | ruakh | @corsiKa: I think a cylindrical shell all the way around a circular building, even if somewhat thinner than one of these columns, will actually be stronger, due to a greater cross-sectional area and greater moments of inertia. | |
| Apr 23, 2020 at 15:48 | comment | added | corsiKa | @cypher if they could be made thinner they could just be made smaller instead... Presumably they're already as small as safety tolerances will allow. | |
| Apr 22, 2020 at 16:54 | comment | added | cypher | Or build skyscrapers in them, make the pillars the "outside" wall of the skyscrapers | |
| Apr 21, 2020 at 20:08 | history | answered | Halfthawed | CC BY-SA 4.0 |