Thank you very much for the link! Reminds me of the older engineering formats of the same style :cheers:
Very interesting:
https://www.youtube.com/watch?v=sJ6mydYuw0M look at the timestamp 4:05
"TIER -19 | Height - 643.30 mtrs" on the laminated Emaar Card connected to the grated stair tread with a cable tie.
That's not the CTBUH measurement from B1 as the starting point (653.30 m), it is the "older" one from Ground level (Podium), two levels above. So for the service personnel the tip sits at 818 m, or they never bothered to change (that card) to (match) CTBUH's zero?