9/5/2023 0 Comments Sears tower floor![]() La vista, hacia el este se pierde en el lago Michigan, lo que nos ofrece una visión más concisa de la altura de este edificio (especialmente para ser construido en 1974) y sus vistas sublimes. Desde la última planta, se puede ver toda la ciudad, incluyendo el John Hancock Center, el otro rascacielos proyectado por Bruce Graham para SOM. El acceso para subir al mirador ha sido posiblemente modificado en los últimos años por razones de seguridad, perdiendo su magnificencia con relación al estatus de edificio más alto del mundo. El edificio, con el paso de los años, parece que ha envejecido bien y se muestra como un proyecto corporativo de forma elegantes sin ninguna estridencia formal o de materiales. Su gran altura apenas nos permite intuir su forma escalonada y su fachada, salvo unas sutiles hendiduras verticales que marcan los distintos tubos estructurales. De repente su visión nos sorprende al llegar a él aun yendo hacia esta zona con visitar su azotea. Pese a ser el rascacielos más alto de la ciudad, la Torre Willis se oculta tras otros edificios desde muchas calles de Chicago. Nos dirigimos hacia el oeste cuando de repente aparece enfrente nuestra un gran rascacielos negro, infinito e impenetrable. Understanding of the height of the Willis Tower (especially because it wasīuilt in 1974) and its sublime relation with the context. When we focus or views toĮast, the infinite merges with the Michigan Lake. Other skyscraper designed by Bruce Graham for SOM. From the topįloor, you can see the entire city, including the John Hancock Center, the Magnificence of the highest building of the world at that time. Modified over the last years for security reasons and it seems to have lost the The lobby access to the skydeck has probably been The building seems to have aged well over the yearsĪnd it shows off as an elegant corporate building without any formal or Its stepped shape except for the subtle vertical grooves of its façade thatįrame the structural tubes. To this area to visit its observation deck. We get surprised by its presence even if we are going Skyscraper in the city, the Willis Tower is hidden behind other buildings from Impenetrable skyscraper appears in front of us. The buildings official address is 233 South Wacker Drive. We walk to the west when, suddenly, a large black, infinite and The all-glass boxes allow visitors to look through the floor to the street 1353 feet below. Text by Skidmore, Ownings & Merrill (SOM). ![]() Los tamaños de los pisos se redujeron al eliminar incrementos de 75 pies por 75 La estructura básicaĭesarrollada para este programa de la torre consta de nueve tubos cuadrados sinĬolumnas de 75 pies por 75 pies en la base, formando un marco de tubo celular. Para los inquilinos que necesitaban menos superficie. Operaciones de la compañía, sino también una variedad de pisos más pequeños Incorporara no solo pisos de oficinas muy amplios, que eran necesarios para las Los proyectistas debían desarrollar un edificio que Icónico de la estructura fue concebido como un resultado directo de las necesidadesĮspaciales del cliente. Sizes were reduced by eliminating 75-foot-by-75-foot increments at varying levels. The basic structureĭeveloped for this program of the tower consists of nine 75-foot-by-75-footĬolumn-free square tubes at the base, forming a cellular-tube frame. Smaller floors for tenants requiring less floor area. Which were necessary for the company’s operations, but also a variety of To develop a building that incorporated not only very large office floors, The floor stringer subsystem has, therefore, played a secondary role in overall system optimization.The iconic setback design of the structure was conceived as aĭirect result of the client’s space requirements. The design procedures for the most part have centered on determination of an acceptable frame span on the basis of required lateral resistance the stringer system is then filled into this framework. Also contributing to the inefficiency is the indirect mode of load transfer from stringer to frame grider to columns. Therefore, the economic potential of floor systems beyond the 40 ft span for high-rise buildings has been inhibited to a large extent by the inefficiency of rigid frames over long spans in resisting lateral loads. ![]() The span of the stringer is governed by the economically feasible frame span and generally ranges from 20 ft to 40 ft. In most cases, these stringers frame into moment-connected girders which are part of the traditional plane-frame system. In 2009, the London-based insurance broker Willis Group Holdings leased more than 140,000 square feet of office space on three floors of the Sears Tower. STRUCTURAL FLOOR SYSTEMS in high-rise steel buildings have usually taken the form of composite or non-composite rolled beam stringers which are spaced at 8 ft to 10 ft centers. "Composite Floor System for Sears Tower," Engineering Journal, American Institute of Steel Construction, Vol. ![]()
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