observation floor height
The vertical distance from the base of a structure to its highest indoor public viewing area.
The observation floor height is entered only for publicly accessible observation areas inside a building. The observation area need not be an entire floor, and may serve additional functions as long as it is periodically available and known to the public at large for window viewing (either free or by admission charge). If more than one such level exists, then the measurement applies to the highest one.
The lower reference is the base of the structure. The upper reference is the qualifying viewing floor, rather than the ceiling above it.
An indoor observation area can occupy part of a floor and share it with another function. The highest qualifying indoor level determines this height even if a separate outdoor observation deck is higher.
Related definitions
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architectural height
The vertical distance from ground level to the highest part of a structure belonging to its architectural design. -
architectural height (CTBUH)
The architectural height of a building measured from the floor level of the lower entrance. -
atrium height
The vertical distance from the lowest to the highest point of the highest enclosed atrium in a structure or module. -
building mass height
The height of a building defined by its enclosed volume plus any designed elements which the roof tapers into. -
escalator vertical rise
The difference in height between the step levels at the lower and upper ends of an escalator. -
height finished floor to finished ceiling
The median height between the top of a floorplate and the ceiling above it. -
height floorplate to floorplate
The median height between the tops of two adjacent floorplates in a multistory structure. -
height floorplate to structural ceiling
The maximum potential room height of a median floor in a building, without a dropped ceiling or raised floor. -
height to eaves
The height of a facade from ground level to where the roof angles away from it. -
helipad height
The vertical distance from the base of a structure to the upper landing surface of its highest helipad. -
inclined autowalk rise
The difference in step level between the lowest and highest points on an inclined autowalk. -
lobby height
The greatest vertical distance from floor to ceiling within a building's qualifying entrance or reception lobby. -
main roof height
The vertical elevation of the primary roofplate, not including small penthouses and turrets. -
nave height
The maximum height from floor to vaulting in the central approach to a church's altar. -
observation deck height
The vertical distance from the base of a structure to its highest outdoor public viewing area. -
podium roof height
The elevation above base level at the point where a tower rises distinctly from a much wider and lower enclosure. -
roof height
The distance from base level to the upper surface of the structure's highest hollow or enclosed portion. -
skylobby height
The vertical distance from base level to the floorplate of the highest elevator transfer area. -
tip height
The distance from base level to the highest constructed or attached object on a structure. -
top bar height
The vertical elevation from a building's base to the floorplate of its highest bar. -
top hotel floor height
The vertical distance from a building's base to the floor slab of its highest floor designated for lodging. -
top mechanical floor height
The vertical distance from base level to the highest full mechanical floor. -
top occupied floor height
The vertical distance from base level to the highest floorplate available for regular occupant usage. -
top office floor height
The vertical elevation of the highest office floor above a building's base. -
top residential floor height
The vertical elevation of the highest residential floor above a building's base. -
top restaurant height
The vertical elevation from a building's base to the floorplate of its highest restaurant.