Tema: Cambio criterios de medición de altura del CTBUH

El CTBUH ha puesto en marcha un nuevo criterio de medición y suprimido el criterio del techo más alto, lo que reduce los criterios de medidas de los rascas a 3, el Burj Dubai medirá cerca de 825 M.

CTBUH Changes Height Criteria

Reproduzco la nota de este organismo:

A modo de resumen:

La altura del edificio no se mide desde la cota 0, sino desde el punto mas bajo de acceso a la torre, dado que algunas como el Burj Dubay tienen "lobbyes" a diferentes niveles.

Los tres criterios de medición son:

- Altura arquitectónica del edificio, desde el primer acceso al mismo hasta la cima del último elemento arquitectónico. Esto incluye las agujas pero excluye antenas, mástiles, etc.

- Altura del último piso ocupado. Quedan excluidas plantas técnicas.

- Altura máxima total del edificio, hasta el último elemento del mismo (incluidos mástiles y demás)


En el link se puede visualizar el ranking de los 10 edificios mas altos en sus tres categorías:

Altura arquitectónica:


Último piso ocupado:


Altura máxima:

Chicago - November 17, 2009

The Council on Tall Buildings and Urban Habitat (CTBUH)—the international body that arbitrates on tall building height and determines the title of “The World’s Tallest Building”—has announced a change to its height criteria, as a reflection of recent developments with several super-tall buildings.

The new criteria wording—“Height is measured from the level of the lowest, significant, open-air, pedestrian entrance to…” allows for the recognition of the increasing numbers of multi-use tall buildings with often several different entrances at different levels, whilst also accommodating buildings constructed in non-traditional urban or suburban locations. The CTBUH Height Committee has determined that the previous description of where to measure tall building height from—“Height is measured from the sidewalk outside the main entrance to…” is now no longer sufficient.

This will have an impact on both the height of tall buildings and their relative international height rankings. Burj Dubai, set to open as the world’s tallest building in January 2010, will now be measured from the lowest of its three main entrances (which opens into the entrance lobby for the tower’s corporate suite office function), while the recently completed Trump International Hotel & Towers in Chicago will be measured from the lower, publicly accessible Chicago Riverwalk. In the case of Trump, this additional 27 feet means that it will surpass the Jin Mao Tower in Shanghai to occupy the rank of 6th tallest on the current list of completed buildings.

“Beginning in 2007, with the knowledge that Burj Dubai would be significantly taller than any structure ever built, the CTBUH Height Committee met to review the criteria by which we recognize and rank the height of buildings,” said Peter Weismantle, Chair of the CTBUH Height Committee and Director of Supertall Building Technology at Adrian Smith + Gordon Gill Architecture in Chicago. “As one might guess, with the committee being made up of architects, engineers, contractors, developers, building owners and academics, a variety of opinions and views were expressed. The resulting revisions almost two years later reflect a general consensus of the committee in recognizing the most recent trends in tall building development around the world.”

Also in response to the changing designs and forms of tall buildings, the Height Committee has elected to discard its previous “Height to Roof” category. “The roof category just doesn’t make sense anymore,” said CTBUH Executive Director Antony Wood. “In the era of the flat-topped modernist tower, a clearly defined roof could usually be identified, but in today’s tall building world—which is increasingly adopting elaborate forms, spires, parapets and other features at the top of the building—it is becoming difficult to determine a ‘roof’ at all, even less so to measure to it.”

The tallest 10 buildings in the world as of November 2009 are shown in the diagrams above, ranked according to the three height categories now recognized by CTBUH. These are: (i) Height to Architectural Top, measured to the topmost architectural feature of the building including spires, but not including antennae, signage, flag poles or other functional-technical equipment; (ii) Height to Highest Occupied Floor, measured to the level of the highest, consistently occupied floor in the building (thus not including service or mechanical areas which experience occasional maintenance access); and (iii) Height to Tip, measured to the highest point of the building, irrespective of material or function of the highest element.

Una vez más se va a crear una nueva polémica, esta vez entre la Trump Tower y Jin Mao. ¿Qué harán esta vez los que criticarón la altura de las torres Petronas frente a la Sears? En todo caso con la Trump Tower, los estadounidenses no podrán acusar a los asiáticos de hacer "trampas" en las alturas como 10 años atrás. Por terminar la clasificación va a cambiar muchisimo, no solo por la entrada del Burj Dubai sino que Asia y sobretodo China está levantando rascas de alturas suficientes para expulsar a la Sears del top 10 (retrocediendo hasta 3 plazas el año que viene en la clasificación Altura Arquitectónica)