definition
strict definition
fence
A nonarchitectural fence or partition installed at the top of a structure as a tip element.
A fence, as a tip element, is a partition installed at the top of a structure which does not belong to the architectural design of that structure.
The partition is an added top element rather than part of the structure's architectural composition. Its material can take the form of wires or webbing, as in the accompanying short description.
A perimeter fence at ground level does not have this top-of-structure role. An architectural parapet or other designed crown differs in belonging to the building's architectural form.
Related definitions
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aircraft warning light
A light alerting aircraft pilots to a structure's presence, placed at its top or at another point presenting a flight hazard. -
antenna
A protruding structure used for the reception or transmission of electromagnetic waves. -
exposed machinery
Exposed mechanical equipment installed at a structure's top and forming its highest physical element. -
flagpole
A flag-supporting mast forming a structure's highest fixed point, with the movable flag and securing rope excluded from tip height.