Veer Towers Chosen as Featured Building
15 April 2011 - Featured Building
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The current legal building name.
A complex is a group of buildings which are designed and built as pieces of a greater development.
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.
Both the main vertical/lateral structural elements and the floor spanning systems are constructed from steel. Note that a building of steel construction with a floor system of concrete planks or concrete slab on top of steel beams is still considered a “steel” structure as the concrete elements are not acting as the primary structure.
Both the main vertical/lateral structural elements and the floor spanning systems are constructed from concrete which has been cast in place and utilizes steel reinforcement bars.
Both the main vertical/lateral structural elements and the floor spanning system are constructed from steel reinforced concrete which has been precast as individual components and assembled together on-site.
Utilizes distinct systems (e.g. steel, concrete, timber), one on top of the other. For example, a steel/concrete indicates a steel structural system located on top of a concrete structural system, with the opposite true of concrete/steel.
A combination of materials (e.g. steel, concrete, timber) are used together in the main structural elements. Examples include buildings which utilize: steel columns with a floor system of reinforced concrete beams; a steel frame system with a concrete core; concrete-encased steel columns; concrete-filled steel tubes; etc. Where known, the CTBUH database breaks out the materials used in a composite building’s core, columns, and floor spanning separately.
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 Elevators refers to the total number of elevator cars (not shafts) contained within a particular building (including public, private and freight elevators).
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15 April 2011 - Featured Building
Part of the new CityCenter complex in Las Vegas, Veer Towers attempts to blur the boundaries between the public and private realm while finding the right balance between becoming an integral part of the city while also giving the buildings and spaces a unique and iconic character. In approaching the design of the towers, the context was not a historical background to build upon, but the framework to establish a new order and create a new image. The Veer Towers lean at five degrees in opposite directions creating an architecture that is at once robust and delicate.
There’s no reflective glass used on the project, making Veer the first truly transparent building in Las Vegas. Extensive use of high performance low-E coating glazing maximizes the introduction of day lighting and views to the outside, which in conjunction with the use of exterior shades and a 57% ceramic frit in 50% of the building’s envelope, provide all the shading to control and reduce the solar loads. Staggered panels of clear and fritted yellow glass animate the façades and give the complex a welcome shot of color while horizontal louvers add a depth and texture to the exterior as well as provide shade from the intense desert sun.
The load-bearing structure is a simple and repetitive system with a Z-shaped central core. The cores of both towers are strategically positioned on the building’s footprint in order to minimize gravity overturning effects, and they continue vertically up the entire building height. While all interior columns rise straight vertically, the tower columns on the north and south building elevations are inclined to follow the lean of the towers.
The south façade of the main building lobbies are expressed with slender concrete columns free standing at over 24m (80ft) high and inclined to articulate the lean of the towers. Due to space constraints and the requirement to maximize usable lobby space, composite column construction was introduced. The architectural design of the main lobby required a unique solution to the heating, cooling and ventilation due to the distinctive nature of these spaces. Each lobby is a multi-level space with a large expanse of glass on the south façade which runs the full height of the space. It provides large quantities of natural light to the lobby and large solar heat gains in summer and heat losses in winter. After studying the space loads and using computational fluid dynamics (CFD) analysis it was determined that the best solution for conditioning the space efficiently was a radiant floor system using chilled and heated water with displacement ventilation providing the required outside air ventilation and supplemental cooling/heating. A radiant cooling surface allows the space temperature to be higher than traditional all-air design solutions reducing energy consumption while maintaining occupant comfort.
Heating and cooling of the apartments is provided by vertical fan coil units. The horizontal sun screen blades provide shading on the east, south and west façades and reduce the energy consumption while minimizing the technical equipment requirements and maximizing occupant comfort.
Responsible uses of appropriate technologies provide an expressive means to realize this project in a sustainable way. The use of construction waste management techniques including diverting 50 to 75% of construction waste from landfills, the use of materials locally or regionally produced and manufactured, recycled materials and wood certified products, result in a significant reduction in environmental impact. Storm water filtration systems controlled flow drainage, use of storm water for irrigation and grey water systems all contribute to water conservation and the reduction in the use of potable municipal water resulting in saved utility charges and reduced impact on natural resources.