We begin on the 6th floor. Right now...in the moment we roll INI, you start to run down, from what I understand. And I will do my part.
I can look around if if I have any map usefull for this, but IMO the stairwell is pretty simple: Stairs, right angle, stairs, right angle, Stairs, Next level. Each "Stairs" will be 5 meters long (+- pythagoras

so it would be (5+5+5+5)x6 means 120 meters to run. Jumping allowed.
This gets you to ground level. Your car is in the basement, 2nd level (visitors) that is another 40 meters to get to the parking lot. Standard floor height=4 meters = 32 meters to get there by freefall

Thresshold for running will be 2, for sprint 3.
Thresshold for jumping (Running+targetted) is 3
Railing gives you 2 dices for every athletic test.
Also...its the Emergency stairwell. Nonslippery surface is a must. +1 dice to Athletic tests
If you don`t meet the thresshold, you will need to make another gymnastic test (thr 3) to avoid fall and injury.
Glitch means Physical damage. Critical glitch means Physical damage with Fatal wounds effect.
Basic damage is 5(s)+net misses