National Commercial Bank in Jeddah: How Hanging Courtyards Formed a Climate-Responsive Tower

National Commercial Bank in Jeddah: How Hanging Courtyards Formed a Climate-Responsive Tower

# The National Commercial Bank Building in Jeddah: An Embodiment of Sustainable and Climatic Architecture ## Introduction The National Commercial Bank building in Jeddah, designed by Skidmore, Owings & Merrill (SOM) and completed in 1983 , stands as a prominent model of integrating modern architecture with traditional environmental principles. It serves as an exceptional case study on how massive concrete blocks can respond to a coastal desert climate. | Fact Sheet | Details | | :--- | :--- | | Designer | Skidmore, Owings & Merrill (SOM) | | Height | 126 meters | | Number of Floors | 27 floors | | Total Area | 57,400 square meters | | Site Area | 1.2 hectares | | Year of Completion | 1983 | ## Architectural Philosophy: Inward Orientation The design is based on the concept of "inward orientation," an intelligent inspiration from traditional Islamic architectural principles that prioritize privacy and thermal comfort . The tower features a recurring triangular shape across all levels, utilizing a solid travertine facade that acts as a protective shield against direct sunlight and dust-laden winds . ## Engineering Explanation and Ventilation System The building's architecture employs hanging courtyards that allow light to enter interior spaces without exposure to direct heat . Glass recesses function as connecting elements between parts of the mass . The cooling strategy relies on a central wall extending from the first floor to the roof, acting as a natural "thermal chimney" where accumulated heat rises and exits the top of the building, promoting air circulation . ## Climate Challenges and Design Solutions Designers faced the challenge of providing sea views while maintaining protection from the sun, which was resolved by: - Protecting V-shaped floors from direct sun and wind . - Using heavy mass as a natural thermal insulator . - Enhancing indirect light via courtyards rather than traditional windows . ## Common Mistakes in Desert Tower Design 1. Excessive reliance on transparent glass facades that increase heat gain. 2. Ignoring thermal mass and its effect on regulating interior temperatures. 3. Failing to account for prevailing winds when orienting architectural masses. ## Future Project Checklist - [ ] Has the sun's path and its impact on facades been studied? - [ ] Does the design enhance natural ventilation through corridors or courtyards? - [ ] Does the mass provide self-protection from shadows and wind? ## Key Takeaways for Project Owners This project highlights the importance of climatic orientation even in large-scale projects; high-rise towers do not conflict with the climate if massing elements are integrated correctly . ## Frequently Asked Questions 1. Why are there no individual windows? They were replaced by large openings that allow light to pass through courtyards . 2. How was heat addressed? Via a central wall acting as a thermal chimney that draws hot air upward . 3. What is the role of inward orientation? It is an inspiration from Islamic architecture to reduce exposure to external factors . 4. Is the building eco-friendly? Yes, by employing natural ventilation strategies and reducing the need for mechanical cooling through design . ## Conclusion The National Commercial Bank building in Jeddah represents an architectural legacy reminding us that sustainable solutions lie in understanding context and climate. This content is for informational purposes only and does not replace approved engineering plans. Merit Axsis is an independent entity and was not involved in the design or execution of this project. For inquiries and architectural consulting: WhatsApp 966593510295 or email meritaxsis@gmail.com. Last verified: September 10, 2026.