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We don't build megatalls simply we wanted to, but to solve the office shortages and demands required.
Even dictatorial regimes in Africa would not build a 600+m skyscraper in the middle of no where, the closest in being was Egypt and Morocco's plans to build supertalls, and that is only just a singled project.
Supply and demand, Africa can't even have the supply, so why the demand to build more?
My opinion is for pure-skyscrapers only. There might still be a possibility that sight-seeing observation towers / freestanding structures will dominate the future "megatall" skyline in the world.
In 20-30 years you will see insane African megacities of 40-50 million people...
The supply will be there
 

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Yes, but will Megatalls become a more viable idea economically because of that? They have no usefulness to offer compared to squatter towers at a lower height, because increasing height means compromises have to be made to make it all work. You need more elevators to supply all the floors, more wiring, plumbing, escape routes, and a bigger load-bearing structure, the building has to be shaped to withstand the extra wind loads, etc., and this eats into the usable floor space pretty quickly. The upper floors are small by necessity, and the lower floors need to have everything that supports the upper floors routed through them. It's easier to make the same amount of floor space in two shorter buildings than one tall (never mind the increased difficulty of construction).

Sure, Megatalls may be built as a matter of national pride and all that, but it's still a very expensive endeavour compared to the returns it offers. Unless you really want that sense of pride (and are sure you can afford it, lest you get a GF117 situation on your hands) they really are a bit of a waste. There's a reson why China stopped building them in the first place, and then banned building them in the second.
 

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Yes, but will Megatalls become a more viable idea economically because of that? They have no usefulness to offer compared to squatter towers at a lower height, because increasing height means compromises have to be made to make it all work. You need more elevators to supply all the floors, more wiring, plumbing, escape routes, and a bigger load-bearing structure, the building has to be shaped to withstand the extra wind loads, etc., and this eats into the usable floor space pretty quickly. The upper floors are small by necessity, and the lower floors need to have everything that supports the upper floors routed through them. It's easier to make the same amount of floor space in two shorter buildings than one tall (never mind the increased difficulty of construction).

Sure, Megatalls may be built as a matter of national pride and all that, but it's still a very expensive endeavour compared to the returns it offers. Unless you really want that sense of pride (and are sure you can afford it, lest you get a GF117 situation on your hands) they really are a bit of a waste. There's a reson why China stopped building them in the first place, and then banned building them in the second.
Again though, I maintain that technological advances should make them viable in at most 20-30 years (and more likely 10 years...) which would provide ample time to build them
 

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whitest boy in the delta
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Again though, I maintain that technological advances should make them viable in at most 20-30 years (and more likely 10 years...) which would provide ample time to build them
the main drawback is building costs and space limitations due to amount of elevators. with new elevator technology we already see tested (no cables, several elevators in one shaft, interconnected shafts with junctions for overtaking) and building costs getting slashed by prefabrication, 3D printing and automation, it is hopefully just a matter of time. With horizontal, vertical and elevator going up sideways, i could see larger and interconnected buildings getting more useful as well though, so maybe not necessarily taller, but someone will build taller for certain. Seeing as these new elevator types are already used in some lowrises for testing and automation has seen big advancements year by year, I am optimistic and think we will see a megatall incorporating some of these new technologies within 10 years (starting, not completing).
 
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We have gone into a problem where most of us are speculative based on the eagerness to construct more, rather than to think realistically based on economy.
 

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Again though, I maintain that technological advances should make them viable in at most 20-30 years (and more likely 10 years...) which would provide ample time to build them
Yes, but those same advances will also benefit smaller towers, leaving the relative difference in economic feasibility between them the same.
 

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WORLD MOST DEVELOPED ADVANCED AND HYPER TECHNOLOGY BASED NEOM CITY COUNSTRATION GOING TO START IN Q1 OF 2021

Oil-free future: What is Saudi Arabia's Neom project
The eco-city with zero cars, roads or carbon emissions is called 'The Line' and is part of the kingdom's $500 billion

Neom project
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The construction project is aimed at diversifying Saudi's economy. It is also Crown Prince Mohammed's latest vision for Saudi Arabia's future beyond oil.

Saudi Crown Prince unveils 'The Line' hyper-connected project at NEOM
Construction of THE LINE will commence in Q1 of 2021. The 170km belt is touted to be one of the most complex infra projects in the world

Here's all you need to know about the mega project:
1

Neom is the crown jewel of Saudi Crown Prince Mohammed bin Salaman's plan to diversify the economy of the country.
2

The project will be built from scratch along the kingdom's picturesque Red Sea coast. It is built as a development evocative of a sci-fi blockbuster.
3

The Neom development project was announced in 2017 by Prince Mohammed as a pillar of his Vision 2030 plan to rid Saudi Arabia of its reliance on crude oil revenues. It spans more than 10,000 square miles in a remote area of the country's northwest.
4

The project is slated to create 380,000 jobs and contribute 180 billion riyals ($48 billion) to the kingdom's gross domestic product (GDP) by 2030.
5

The 170 km eco-city, dubbed as 'The Line' will be able to accommodate 1 million residents in "carbon-positive urban developments" by 2030.
6

The project is the conclusion of three years of preparation and infrastructure of the city would cost $100 billion to $200 billion.
7

The pedestrian city will have services such as schools, health centres and green spaces, as well as high-speed public transportation, with no journey expected to take more than 20 minutes.
8

It will be powered by 100 per cent clean energy, providing pollution-free, healthier and more sustainable environments for residents.
9

The city would be built around ultra-high speed transit and autonomous mobility solutions. Artificial intelligence will play a key role in the city.
10

The backbone of investment in 'The Line' will come from the $500 billion support to Neom by the Saudi government, PIF and local and global investors over 10 years.
11

Construction is expected to start in the first quarter of 2021 and will be able to house a million residents by 2030.
12

Saudi's sovereign wealth fund, the Public Investment Fund (PIF), is the cornerstone investor in Neom
 

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What is the reasoning for sprawling a city of a million out across such a long line? It's definitely making mobility much more of a challenge.

Also, unless there are specific plans for Megatalls, I don't think this post belongs in this thread.
 

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whitest boy in the delta
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What is the reasoning for sprawling a city of a million out across such a long line? It's definitely making mobility much more of a challenge.
I guess because there will be high speed transit along one corridor infrastructure will be centered along it and it being straight is important for the transit. The number of 1 million for 170km is ridiculously low though and you could just house 1 million very close together, but maybe they are hoping for more people to arrive in time. seems all a bit fishy to me as well and the renders are all vision stuff and not serious proposals.
 

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I am not kidding and these is a nice topic for discussion If you have some knowledge about this giga project
 

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whitest boy in the delta
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the images don't make much sense, those are images by artists and not architects.
 

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There's already a thread started a few years back.
 
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