The relation between alexander's fifteen fundamental properties and sustainability in office buildings Abstract :
The Shading system plays a significant role in the building envelope design. In addition, the shading system geometry controls both appearance and performance of the building. On the other hand, Christopher alexander -theorist and architect- developed a theory about the impact of certain geometrical rules on the human beings psychological needs. Alexander found that these rules have a great impact in removing anxiety and creating a comfortable feeling to the building occupants. Therefore, this paper investigates the following points: first, the external shading, second , the alexandrine rules and theory and third the relationship between alexandrine geometric rules and building sustainability .The investigation is done by analyzing 30 case studies which certified sustainable. The analysis resulted that there is a certain relation between using each of the fifteen alexandrine rule and achieving sustainability of the building.