# Advanced High-Rise Design Applications ## Overview Advanced high-rise design applications represent the pinnacle of architectural and engineering ingenuity, pushing the boundaries of what is possible in the built environment. These innovative approaches are employed in the creation of tall buildings that redefine height, structural performance, operational efficiency, and environmental sustainability. Characterized by their inherent verticality, these structures necessitate profoundly sophisticated solutions for managing immense lateral forces, ensuring efficient vertical transportation, and seamlessly integrating complex [[mechanical, electrical, and plumbing]] (MEP) systems. High-rise buildings are generally defined as structures where vertical transport, primarily via elevators, and robust lateral load resistance become the dominant design imperatives, typically exceeding 75 feet, or approximately seven stories, in height. The pursuit of advanced high-rise design is driven by increasing global urbanization, the demand for efficient land use, and the aspiration to create iconic and resilient urban landmarks. These structures are not merely tall; they are complex ecosystems that demand interdisciplinary collaboration, cutting-edge technology, and a deep understanding of physics, materials science, and human factors to overcome unprecedented challenges in their conception, construction, and operation. ## Historical Context The human ambition to construct towering structures is deeply rooted in history, evident in ancient marvels such as the pyramids of Egypt and the ziggurats of Mesopotamia. However, the modern era of high-rise architecture truly commenced in the latter half of the 19th century, catalyzed by a confluence of critical technological breakthroughs that fundamentally reshaped urban development. A pivotal moment arrived in 1852 with Elisha Graves Otis's invention of the "fall-safe" hoisting system. This revolutionary device, which prevented the elevator car from plummeting if the hoisting ropes failed, transformed elevators from a dangerous novelty into a practical and secure means of vertical transportation. This innovation was not merely mechanical; it was architectural, as it fundamentally unlocked the potential for buildings to extend beyond the practical limits of stair-based access, thereby paving the way for truly multi-story structures and influencing the very massing and internal circulation of future skyscrapers. The world's first skyscraper, the [[Home Insurance Building]] in Chicago, completed in 1885 and designed by William Le Baron Jenney, marked a revolutionary departure from traditional construction. Standing at 10 stories (42 meters), its groundbreaking use of a steel-frame structure allowed for unprecedented height without the prohibitive weight of solid masonry walls. This skeletal steel frame, supporting both the floors and the exterior cladding, fundamentally altered the trajectory of urban development by demonstrating that height could be achieved with lightness and efficiency, rather than sheer mass. The early 20th century witnessed a rapid proliferation of skyscraper construction, heavily influenced by architectural movements such as Art Deco and Modernism. Iconic structures from this period include the Flatiron Building in New York City (1902), a testament to the aesthetic and structural potential of the steel frame, and the Empire State Building (New York, 1931). The Empire State Building, reaching 1,454 feet (443.2 meters), held the title of the world's tallest building for nearly four decades, showcasing the era's engineering prowess and architectural ambition. Following World War II, further advancements in materials science, particularly in high-strength reinforced concrete and innovative curtain wall systems, propelled skyscraper development into a new phase. The John Hancock Center in Chicago (1969), designed by Skidmore, Owings & Merrill (SOM), exemplified this evolution. Its innovative X-braced exterior structural system, a hallmark of its design, was not merely decorative but a highly efficient engineering solution. This system formed a "braced tube" structure, where the exterior walls, composed of steel columns and diagonal braces, acted as a rigid, hollow cylinder to resist lateral wind loads. This integration of structure and facade allowed for a significant reduction in the amount of steel required compared to conventional framed buildings, making it both economical and visually striking. The X-braces effectively transferred wind loads to the building's core and foundations, dramatically stiffening the structure against sway and becoming a landmark of advanced [[structural engineering]]. The late 20th and early 21st centuries have been characterized by an unparalleled acceleration in the construction of supertall (exceeding 300 meters) and megatall (exceeding 600 meters) buildings. This trend, fueled by rapid urbanization, economic growth, and continuous technological innovation, directly builds upon the foundational principles and breakthroughs established in earlier eras, pushing the boundaries of height and complexity further than ever before. This continuous evolution in materials, structural understanding, and digital tools has led to the highly sophisticated engineering principles and construction methods that define advanced high-rise design today. ## Engineering Principles Advanced high-rise design is underpinned by a complex interplay of engineering principles meticulously orchestrated to guarantee structural integrity, occupant comfort, and operational efficiency against an array of formidable forces. ### Load-Bearing Capacity High-rise buildings must be engineered to withstand substantial vertical and environmental loads. Dead loads, comprising the inherent weight of the building's structure, finishes, and fixed equipment, are significant. Live loads, which account for occupants, furniture, and movable equipment, fluctuate. Crucially, environmental loads, including powerful wind forces, seismic activity, and temperature-induced material expansion and contraction, exert immense pressures on the structure. To counteract these, robust framing systems, sophisticated load transfer mechanisms such as core and perimeter structures, and built-in redundancy within structural elements are paramount. This redundancy, often achieved through multiple load paths and interconnected structural components, is vital for preventing [[progressive collapse]] in the event of localized failure and ensuring overall structural stability and safety. ### Lateral Stability As buildings ascend to greater heights, lateral forces, predominantly from wind and seismic events, become the most critical design drivers. These forces necessitate highly sophisticated solutions to prevent excessive swaying, which can induce occupant discomfort and potentially lead to structural damage. * **Aerodynamic Shaping and Turbulent Airflow Mitigation:** The external form of high-rise buildings is meticulously optimized to minimize wind resistance and mitigate the impact of turbulent airflow. Turbulent airflow, characterized by unpredictable eddies and vortices, can induce significant dynamic loads, vibrations, and even vortex shedding, which can cause resonant oscillations in the structure. Streamlined shapes, such as circular, elliptical, or tapering plans, can reduce wind carrier coefficients by approximately 30% compared to conventional rectangular plans, thereby significantly mitigating wind-induced loads and reducing the potential for adverse aerodynamic effects. Design choices like chamfered corners, setbacks, and strategically placed openings or perforations in the facade are not merely aesthetic but are carefully engineered to disrupt and dissipate wind forces, preventing the formation of strong vortices and ensuring smoother airflow around the building. * **Computational Fluid Dynamics (CFD):** Advanced high-rise design heavily relies on Computational Fluid Dynamics (CFD) modeling techniques. CFD simulations allow engineers to create virtual models of the building and its surrounding environment, subjecting them to various wind conditions. This sophisticated analysis provides detailed insights into pressure distribution, turbulent airflow patterns, and potential vortex shedding frequencies, enabling designers to optimize the building's form and facade geometry to minimize wind loads and enhance aerodynamic performance before physical construction begins. * **Tuned Mass Dampers (TMDs):** These highly effective systems are strategically integrated into tall buildings to absorb and dissipate vibrational energy caused by wind or earthquakes. Often manifesting as massive pendulums or hydraulic mechanisms, TMDs are precisely tuned to counteract the building's resonant frequencies, enhancing both occupant comfort by reducing sway and the overall structural resilience of the building. * **Structural Systems:** A variety of advanced structural systems are employed to resist lateral loads. These include: * **Shear Walls:** Rigid vertical diaphragms designed to resist horizontal forces, typically made of reinforced concrete. * **Moment-Resisting Frames:** Where beams and columns are rigidly connected to form a stiff framework, capable of resisting bending moments induced by lateral loads. * **Core-Outrigger Systems:** Connect a central shear core to exterior columns via horizontal trusses or braces (outriggers) to distribute loads more effectively across the building's entire cross-section, significantly increasing its stiffness. * **Diagrids:** Characterized by diagonal intersecting beams that form highly efficient triangular structures, often visible on the building's exterior, providing both structural efficiency and a distinctive aesthetic. * **Bundled Tube Systems:** Consist of multiple interconnected tubes acting as a single, robust structural unit, allowing for greater height and flexibility in floor plans while efficiently resisting lateral forces. ### Foundation Design The immense weight of high-rise structures necessitates deep and exceptionally stable foundations capable of transferring colossal loads to stable soil strata or bedrock. This often requires extensive geotechnical surveys to assess soil conditions, including soil bearing capacity, settlement potential, and seismic liquefaction risk. Based on these surveys, specialized foundation types are implemented, such as pile foundations (deep, slender elements driven or drilled into the ground to transfer loads to deeper, stronger soil layers) or caissons (large-diameter, deep foundations often excavated and filled with concrete). In some cases, raft foundations, which spread the load over a large area, are combined with piles for optimal load distribution. ### Thermal and Mechanical Principles Managing internal climate, air quality, and vertical movement within tall buildings presents complex challenges that are amplified by height. * **HVAC Zoning and Stack Effect:** High-rise buildings require meticulously zoned [[Heating, Ventilation, and Air Conditioning]] (HVAC) systems. This is essential to accommodate significant variations in temperature and pressure across different floors, a phenomenon partly attributed to the "stack effect." The stack effect occurs when warm air rises and escapes from the upper levels while cold air is drawn in at lower levels (or vice-versa depending on external conditions and internal heating/cooling). This natural draft can create significant pressure differentials, affecting air quality, thermal comfort, and even elevator performance. Advanced HVAC systems employ strategies like pressure equalization, compartmentalization, and multiple air handling units distributed vertically to mitigate these effects. * **Energy Recovery and Efficient Systems:** Advanced HVAC systems are crucial for energy efficiency. This includes Variable Refrigerant Flow (VRF) systems, which allow for precise control of heating and cooling in different zones, and chilled beams, which use water to cool spaces, offering efficient heat removal with reduced fan energy. Energy recovery ventilators (ERVs) and heat recovery ventilators (HRVs) reclaim energy from exhaust air to pre-condition incoming fresh air, significantly reducing the energy load for heating and cooling. * **Vertical Transportation:** Efficient and rapid vertical transportation is paramount in high-rise buildings, impacting occupant experience and operational costs. Advanced elevator systems, such as destination dispatch, which groups passengers going to similar floors, and double-decker elevators, which can serve two floors simultaneously, are critical for moving large numbers of people quickly and minimizing energy consumption, which can account for 5-10% of a skyscraper's total energy use. Innovative concepts like multi-directional elevators (e.g., Thyssenkrupp's MULTI system) are also being explored to further enhance efficiency and reduce core space requirements. * **MEP System Complexity and Challenges:** The sheer verticality of high-rises creates unique challenges for MEP systems. Distributing water, waste, power, and data across hundreds of meters requires specialized pumps, risers, and pressure-reducing valves. Fire safety in tall buildings presents particularly complex logistical and engineering challenges, demanding sophisticated sprinkler systems, smoke control, pressurized stairwells, and robust emergency power. Ventilation strategies must account for the stack effect and ensure adequate fresh air supply and exhaust, especially in densely occupied spaces, while minimizing energy loss. ## Materials and Construction Methods The relentless pursuit of height, efficiency, and sustainability in advanced high-rise design is inextricably linked to breakthroughs in materials science and innovative construction methodologies. ### Materials Science * **High-Strength Concrete (HSC):** HSC is a cornerstone of modern high-rise construction, offering compressive strengths ranging from 6,000 to 15,000 psi (approximately 40 to 100 MPa) and even higher for ultra-high-performance concrete (UHPC). Its superior performance is achieved through refined mix designs that incorporate lower water-to-cement ratios, high-performance admixtures like silica fume, fly ash, and superplasticizers, and precisely graded aggregates. This creates a denser, less permeable matrix capable of supporting significantly greater loads while allowing for slimmer structural elements, thereby maximizing usable space. HSC also substantially improves resistance to environmental impacts, enhancing durability, and offers superior fire and blast resistance. * **Advanced Steel Alloys:** High-strength steel, classified as having a yield strength of 690 MPa (100 kilopounds per square inch) or higher, is increasingly utilized to optimize structural reinforcement. Its superior strength allows for a reduction in the volume and weight of structural members and rebar required, leading to lighter structures, improved constructability, and enhanced durability and efficiency. These alloys often exhibit improved ductility and weldability, crucial for complex high-rise connections. * **Glass and Facade Systems:** High-performance glass and advanced facade systems are critical for managing thermal performance, maximizing daylighting, and achieving energy efficiency in tall buildings. Innovations include smart glass technology, which can dynamically change opacity and control the transmission of light and heat, thereby optimizing energy efficiency and offering dynamic aesthetic possibilities. Double-glazed windows, triple-glazed units, and integrated acoustic panels are routinely employed for superior sound insulation, enhancing occupant comfort and mitigating external noise. Advanced curtain wall systems often incorporate integrated shading devices, ventilation strategies, and even photovoltaic cells. * **[[Sustainable Materials]]:** The imperative for environmental responsibility is driving the integration of eco-friendly materials into high-rise construction. This includes the use of recycled steel, sustainably sourced wood (especially for hybrid timber-concrete structures which leverage the strength of concrete with the low embodied carbon of mass timber), and low-carbon concrete formulations (e.g., using supplementary cementitious materials or carbon capture technologies), all aimed at significantly reducing the embodied carbon footprint of these monumental structures. ### Construction Methods Innovative construction methods are indispensable for achieving the requisite speed, safety, and efficiency of advanced high-rise projects. * **Prefabrication and [[Modular Construction]]:** This technique involves manufacturing building components off-site in controlled factory environments, which are then transported and assembled on-site. This approach significantly reduces construction time, enhances quality control by minimizing on-site variables, and substantially reduces material waste. Broad Sustainable Building (BSB) in China famously demonstrated this efficiency by constructing a 30-story building (T30) in a remarkable 15 days using pre-assembled components, including entire floor slabs with integrated MEP systems. * **Top-Down Construction:** This highly specialized technique involves building the structural core, often referred to as "spines," to its full height first. Subsequently, floors are fabricated on the ground, often complete with all systems, and then lifted into place from the top down, where they are secured to the central core. The Exchange Tower in Detroit, a 63-meter residential building, stands as a notable North American example of this method. This approach significantly improves worker safety by performing much of the work at ground level and can lead to considerable cost and schedule savings, particularly on constrained urban sites. * **Jump Form Systems:** Jump form systems are widely employed for the rapid and continuous construction of concrete cores and shear walls in high-rise buildings. These self-climbing formwork systems allow for concrete to be poured in successive lifts as the structure rises. The formwork itself "jumps" upwards, typically using hydraulic rams, eliminating the need for cranes to reposition it for each new level. This optimizes construction speed, ensures consistent quality, and improves site safety by providing a stable working platform at height. * **Digital Technologies:** The integration of digital technologies is transforming high-rise construction and design. [[Building Information Modeling]] (BIM) provides a comprehensive digital representation of the building, facilitating visualization, coordination among trades, and early conflict detection across all disciplines (architecture, structure, MEP). Advanced structural analysis software such as SAP2000, ETABS, and CSI SAFE are indispensable for complex calculations of load distribution, seismic response, and wind effects, optimizing structural elements for efficiency and safety. Parametric design tools like Grasshopper for Rhino and Dynamo for Revit allow architects and engineers to explore complex geometries and structural solutions rapidly, conducting iterative optimizations. Augmented Reality (AR) and Virtual Reality (VR) are increasingly used for immersive visualization, design review, and optimization throughout the construction process, enhancing collaboration and precision. ## Case Studies ### 1. Burj Khalifa, Dubai, UAE * **Architect:** Adrian Smith (at Skidmore, Owings & Merrill - SOM) * **Completion Year:** 2010 * **Structural Details:** Soaring to over 828 meters and comprising 163 floors, the Burj Khalifa stands as a testament to advanced high-rise engineering. Its structural system is a "buttressed core," characterized by a hexagonal central core buttressed by three wings. This Y-shaped plan provides an inherently stable form, crucial for resisting the immense wind and seismic forces encountered at such extreme heights. Both the core and wings are constructed from high-strength concrete, with some elements achieving compressive strengths of 80 MPa (11,600 psi). The building also incorporates a sophisticated tuned mass damper system to effectively minimize sway and enhance occupant comfort. * **Advanced Applications:** The Burj Khalifa is renowned as one of the world's "smartest" structures. It employs Honeywell's Outcome-Based services system to continuously track and optimize its HVAC systems, which has reportedly led to a 40% reduction in maintenance hours for mechanical assets and nearly 100% availability. Furthermore, it integrates cutting-edge IoT sensors and an intelligent HVAC system that dynamically adjusts based on real-time occupancy data, optimizing energy use and environmental control. ### 2. Shanghai Tower, Shanghai, China * **Architect:** Marshall Strabala and Jun Xia (at Gensler) * **Completion Year:** 2015 * **Structural Details:** The Shanghai Tower, a 632-meter "megatall" skyscraper, showcases an innovative approach to sustainable high-rise design. Its most distinctive feature is a unique double-skin facade that functions as a thermal buffer, significantly reducing energy consumption for both heating and cooling. The building's spiraling form is aerodynamically designed to reduce wind loads by an impressive 24%, which translates into substantial savings on structural materials. A large tuned mass damper is strategically located near the top of the tower to mitigate swaying. The structure itself comprises nine cylindrical buildings stacked vertically, all enveloped by the inner and outer glass facades. * **Advanced Applications:** The tower integrates a sophisticated Central Energy Management Control System and numerous smart sensors to continuously monitor and control environmental conditions, contributing to a documented 21% improvement in energy efficiency. The design of the outer skin allows for abundant natural light penetration while simultaneously reducing the need for artificial air conditioning, further enhancing its sustainable credentials and providing vertical gardens within the buffer zone. ### 3. 432 Park Avenue, New York City, USA * **Architect:** Rafael Viñoly * **Completion Year:** 2015 * **Structural Details:** Standing at 426 meters (1,396 feet), 432 Park Avenue is a prominent residential tower celebrated for its exceptionally slender aspect ratio. Its structural integrity is primarily derived from two rigid tubes constructed from ultra-high-strength concrete, achieving an impressive 14,000 psi (approximately 96.5 MPa). This robust concrete structure enabled a "pure structure" design, eliminating interior columns and thereby offering uninterrupted views and unparalleled flexibility in apartment layouts. The [[architectural design]] also ingeniously incorporates open mechanical floors at regular intervals, allowing wind to pass through the building, which significantly reduces overall wind loads on the structure and mitigates vortex shedding effects. ## Contemporary Applications Modern high-rise design is increasingly centered on sustainability, the integration of smart technology, and the creation of resilient, dynamic mixed-use urban environments. * **Sustainable Design and Green Building Practices:** Future high-rises are prioritizing radical energy efficiency through advanced HVAC systems, energy-saving LED lighting, and the integration of renewable energy sources such as solar panels and wind turbines directly into the building's exterior. [[Green roofs and vertical gardens]] are increasingly common, improving air quality, reducing heat absorption, and mitigating the urban heat island effect. Passive cooling strategies, such as natural ventilation, solar shading, and thermal mass optimization, are integrated to reduce reliance on mechanical cooling. Biophilic design, which consciously integrates natural elements and systems into the built environment, aims to decrease energy consumption, improve indoor air quality, and enhance thermal comfort and occupant well-being. * **Smart Building Technology:** The ubiquitous integration of Internet of Things (IoT) sensors, Artificial Intelligence (AI)-powered [[building management systems]] (BMS), and comprehensive building automation systems (BAS) is enabling high-rises to monitor and optimize energy usage, HVAC performance, security protocols, and even predict maintenance needs in real-time. Smart glass technology, capable of dynamically altering its opacity, further enhances energy efficiency and offers flexible aesthetic possibilities by controlling light and heat transmission. * **Mixed-Use Developments:** Contemporary skyscrapers are increasingly conceived as integrated, multi-functional entities, designed to serve a diverse array of purposes—residential, commercial, retail, and recreational—within a single vertical structure. This approach maximizes valuable urban land use, fosters vibrant, self-contained urban communities, and reduces the need for extensive travel, promoting a more sustainable urban lifestyle. * **Resilience and Adaptability:** Future high-rises are being meticulously designed to withstand the escalating threats of natural disasters, including earthquakes, hurricanes, and extreme weather events. This involves advanced seismic-resistant designs, such as flexible foundations, base isolation systems, and shock-absorbing materials, alongside sophisticated wind-damping systems. The concept of adaptive reuse, which involves repurposing existing structures rather than demolishing and rebuilding, is also gaining significant traction, challenging traditional approaches to urban development and reducing embodied carbon. * **Digital Twins:** The creation of "digital twins"—virtual replicas of physical buildings—is revolutionizing building management. These digital models, continuously fed with real-time data from IoT sensors, allow for precise monitoring of structural health, proactive maintenance scheduling, and continuous optimization of occupant comfort, energy efficiency, and operational performance throughout the building's entire lifecycle. ## Advantages and Limitations ### Advantages Advanced high-rise design offers a multitude of benefits, particularly in the context of global urbanization. They provide an exceptionally efficient solution for maximizing land use in densely populated urban centers, accommodating a large number of people and functions within a compact footprint. High-rises often serve as iconic urban landmarks, contributing to a city's identity and showcasing architectural and engineering prowess. They are powerful incubators for technological innovation, driving advancements in materials science, structural engineering, and smart building systems. With a strong contemporary focus on sustainability, advanced high-rises have the potential to integrate cutting-edge green building practices, significantly reducing their operational environmental footprint through energy efficiency and renewable integration. Furthermore, the trend towards mixed-use developments within high-rises fosters vibrant, self-sufficient urban communities, reducing commuting times and enhancing urban livability. ### Limitations Despite their numerous advantages, advanced high-rise applications also present significant limitations and challenges. The sheer scale and complexity of these projects translate into exceptionally high construction costs, often requiring substantial investment and long payback periods. The engineering challenges are immense, particularly concerning lateral stability against wind and seismic forces, requiring continuous innovation and rigorous analysis, often constrained by stringent building codes and regulations that dictate minimum safety factors and performance criteria. From an environmental perspective, while operational energy efficiency is a focus, the embodied carbon footprint associated with the production of high-strength concrete and steel can be substantial, demanding innovative material solutions. Operational energy consumption, particularly for vertical transportation and HVAC, remains a challenge, despite advanced energy recovery systems and efficient equipment. Vertical transportation systems, even with sophisticated destination dispatch, can still become bottlenecks during peak hours, impacting efficiency and occupant experience. Furthermore, the "massing" or sheer scale of these buildings can raise significant social and urban concerns. These include gentrification and displacement of existing communities, the creation of significant shadow effects on surrounding public spaces and properties, and potential impacts on local microclimates (e.g., increased wind tunnels at street level). Fire safety and evacuation in supertall buildings present unique and complex logistical and engineering challenges that require specialized solutions, including robust compartmentalization, advanced smoke management, and redundant egress routes. Managing the complex MEP systems, including water pressure, waste removal, and intricate ventilation strategies, across such extreme heights also poses ongoing operational and maintenance hurdles. ## Related Architectural Concepts For a more comprehensive understanding within an architectural encyclopedia, the following related topics are pertinent: * [[Facade Systems and Performance]]: Explores the design, materials, and engineering of building envelopes, focusing on thermal, acoustic, and aesthetic performance. * [[Structural Engineering (specifically Lateral Load Resisting Systems)]]: Delves into the advanced techniques and systems employed to counteract horizontal forces from wind and seismic activity. * [[Sustainable Architecture and Green Building Certifications (e.g., LEED)]]: Examines environmentally conscious design principles and frameworks for assessing and certifying sustainable buildings. * Urban Planning and Vertical Urbanism: Investigates the integration of tall buildings into cityscapes and the concept of creating dense, multi-layered urban environments. * Vertical Transportation Systems (Elevators and Escalators): Focuses on the technology, efficiency, and design of systems that move people within high-rise structures. * Building Information Modeling (BIM): Discusses the digital process for creating and managing information about a building project throughout its lifecycle. * Mechanical, Electrical, and Plumbing (MEP) Systems: Covers the design and integration of essential building services for comfort, safety, and functionality. * Fire Safety Engineering in Tall Buildings: Addresses the unique challenges and specialized solutions for fire detection, suppression, and evacuation in high-rise structures. * Acoustic Design in High-Rise Structures: Explores strategies for mitigating noise transmission and ensuring acoustic comfort within tall buildings. * Smart Building Technology and IoT Integration: Focuses on the use of sensors, data analytics, and automation to optimize [[building performance]] and occupant experience. ## References and Sources 1. CTBUH. (n.d.). *Council on Tall Buildings and Urban Habitat*. Retrieved from [https://www.ctbuh.org/](https://www.ctbuh.org/) 2. Gensler. (n.d.). *Shanghai Tower: A New Landmark for Sustainable Design*. Retrieved from [https://www.gensler.com/projects/shanghai-tower](https://www.gensler.com/projects/shanghai-tower) 3. Honeywell. (n.d.). *Burj Khalifa: The World's Smartest Building*. Retrieved from [https://www.honeywell.com/us/en/news/2019/07/burj-khalifa-the-worlds-smartest-building-with-honeywell-outcome-based-services](https://www.honeywell.com/us/en/news/2019/07/burj-khalifa-the-worlds-smartest-building-with-honeywell-outcome-based-services) 4. Otis. (n.d.). *The History of the Elevator*. Retrieved from [https://www.otis.com/en/us/our-company/history/](https://www.otis.com/en/us/our-company/history/) 5. SOM. (n.d.). *John Hancock Center (875 N. Michigan Ave.)*. Retrieved from [https://www.som.com/projects/875-n-michigan-ave/](https://www.som.com/projects/875-n-michigan-ave/) 6. The B1M. (2022, May ## Related Architectural Concepts - [[Heating, Ventilation, And Air Conditioning]] - [[Mechanical, Electrical, And Plumbing]] - [[Green Roofs And Vertical Gardens]] - [[Building Information Modeling]] - [[Building Management Systems]] - [[Sustainable Architecture]] - [[Home Insurance Building]] - [[Vertical Transportation]] - [[Structural Engineering]] - [[Grasshopper For Rhino]] - [[Sustainable Materials]] - [[Architectural Design]] - [[Building Performance]] - [[Modular Construction]] - [[Progressive Collapse]]