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The current legal building name.
CTBUH collects data on two major types of tall structures: 'Buildings' and 'Telecommunications / Observation Towers.' A 'Building' is a structure where at least 50% of the height is occupied by usable floor area. A 'Telecommunications / Observation Tower' is a structure where less than 50% of the structure's height is occupied by usable floor area. Only 'Buildings' are eligible for the CTBUH 'Tallest Buildings' lists.
The CTBUH follows the United Nations's definition of Country, and thus uses the lists and codes established by that organization.
The CTBUH follows the United Nations's definition of City, and thus uses the lists and codes established by that organization.
A single-function tall building is defined as one where 85% or more of its usable floor area is dedicated to a single usage. Thus a building with 90% office floor area would be said to be an "office" building, irrespective of other minor functions it may also contain.
A mixed-use tall building contains two or more functions (or uses), where each of the functions occupy a significant proportion of the tower's total space. Support areas such as car parks and mechanical plant space do not constitute mixed-use functions. Functions are denoted on CTBUH "Tallest Building" lists in descending order, e.g., "hotel/office" indicates hotel function above office function.
Height is measured from the level of the lowest, significant, open-air, pedestrian entrance to the architectural top of the building, including spires, but not including antennae, signage, flag poles or other functional-technical equipment. This measurement is the most widely utilized and is employed to define the Council on Tall Buildings and Urban Habitat (CTBUH) rankings of the "World's Tallest Buildings."
The number of floors above ground should include the ground floor level and be the number of main floors above ground, including any significant mezzanine floors and major mechanical plant floors. Mechanical mezzanines should not be included if they have a significantly smaller floor area than the major floors below. Similarly, mechanical penthouses or plant rooms protruding above the general roof area should not be counted. Note: CTBUH floor counts may differ from published accounts, as it is common in some regions of the world for certain floor levels not to be included (e.g., the level 4, 14, 24, etc. in Hong Kong).
The number of floors below ground should include all major floors located below the ground floor level.
Number of Parking Spaces refers to the total number of car parking spaces contained within a particular building.
Strategically situated overlooking the Scioto River and Bicentennial Park, the Columbia Gas Distribution Company's building involved the construction of a 14-story, 257,000 sq.ft. corporate headquarters building with interior design, and the rehabilitation of an existing 390-space parking garage located adjacent to the site. The dramatic design followed a goal of the company of providing views of the river to all members of the staff and minimizing offices along the perimeter. The building lobby features travertine marble on the floors and walls with landscaped seating and planting areas integrated into the design. One entire floor is dedicated to food service with a large cafeteria for the office staff, private dining areas for meetings and an executive dining area with an outdoor terrace. The headquarters building also includes training and computer facilities. Throughout the planning of the facility, flexibility of space was the governing principal of design. All enclosed offices were constructed of demountable partitions to further add to the flexibility of the building. The use of an office furniture system significantly increased the work space for each employee and rapidly adjusts to changes within each department.