An air pressure problem/question?

Question

Ok, so I need to figure out this problem involving air pressure for a story I'm writing. In my story, there is a building that is 777 stories tall (lit. 781+) ie. 2087 m or 6260 ft. Now I need to find out at what floor or height the air pressure would become so much that you couldn't breath, or could even die. And also the air pressure at the top.

If you know any good air pressure solutions, that would be great too.

Also, if any extra info is needed to solve this, I can supply it.

Thanks!

Would it be very strenuous on people working and going there? Like when you climb a tall tower, you can feel the pressure in your ears, and that's only 100 stories.

Answer 1

You would need to be a lot higher than that. Oxygen is required in aeroplanes above 10,000ft but you can fly safely below that level without oxygen so no-one should have breathing problems in your tower.

Answer 2

Generally speaking when flying, oxygen is not needed until above an altitude of 10,000 feet. Since your building is shorter than that this should not be a problem.

Unless, the building is build below sea level, the question of the pressure killing someone is also a mute one.

Answer 3

Both previous answers are correct. Here is a web page that will compute the barometric pressure at any height.
http://hyperphysics.phy-astr.gsu.edu/hbase/kinetic/barfor.html#c1

But, maybe if you could make the building talled in your story, you could talk about how one can climb to the top, but must "acclimatize" while doing it, like they have to when climbing Mt Everest.