Outriggers are obstructive inside the floor interfering with occupiable or rentable space thereby usually limiting their placement in mechanical and/or refuge floors (Moon 2018). Offices Floorplate efficiency is described as the percentage of usable office area. It is exclusive of lift lobbies, toilets, staircases, fire tower, AHU (air handling units), electrical rooms, and all shaft cut-outs. For PET, it is limited to 65%. Services core planned at the center do not disrupt the working areas during maintenance and fit-out [See Figure 9 (b)].
Figure 9. Conceptual drawings for PET. (a) Architectural Section of PET © SOM 2021, (b) Typical Office Floorplate.
Figure 10. Architectural rendering of 99th-floor sky deck © SOM 2021
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