ICBEST 2014 June 09-12, 2014, Aachen, Germany Full-Scale Unitized Façade System Testing for Structural and Infiltration Performance Evaluation E. Ilter 1 , A. Tavil 2 , O. C. Celik 2 and M. Seyhan 3 1 Istanbul Technical University, Graduate School of Science, Engineering and Technology, Istanbul 2 Istanbul Technical University, Faculty of Architecture, Istanbul 3 Façade Testing Institute (FTI), Istanbul Corresponding author: E. Ilter, emirilter@yahoo.com Abstract This paper presents real time and full-scale performance tests applied on an outdoor test rig in order to evaluate a unitized façade system’s long term structural (load bearing) and infiltration performances under repeated loading (fatigue process) histories. Tests have been conducted in accordance with TS EN 13830 and AAMA 501.4 standards. In the test environment, there are two identically detailed and separate unitized façade systems installed within the test rig. Normal test procedure has been applied on one system, while fatigue process has also been applied to the other system in addition to the normal test procedure. Air infiltration, water penetration, wind, and seismic resistance tests have been applied to the specimens at four different intervals to observe the possible changes in their performances. To evaluate long-term performance of the test specimens, numerical data for wind resistance and air infiltration test results have been used in a total period of 360 days. The experimental results reported in this paper include air infiltration and frontal deflection values measured on the façade surfaces. Hence, performance of the systems has been compared and the effect of the fatigue procedure on the façade performance has been evaluated. 1 Introduction Developments in the façade technology continue with an increasing momentum due to the requirements of high-rise buildings in big cities. In this context, unitized façade systems find a wide application area since it brings advantages for high-rise buildings regarding the ease of construction, lightness, etc. However, right along with the advantages of the unitized façade systems, some design and application problems related to their structural and infiltration performances might arise during its life cycle, which are difficult for the building to compensate. Repeated variable wind loads and climatic conditions are the most significant factors, which affect the long-term structural and infiltration performances of façade systems in high-rise buildings. Experiences verify that in the design of unitized curtain wall system, the three criteria such as structural integrity, provision for movement, and weather tightness are of great importance. Certainly, there are a number of other considerations, most of which are of less critical importance and some of which vary in importance depending on the location and type of building ([1], Wong, 2007). Standard test methods by themselves, however, may not be sufficient to specify all the requirements for the mock-up test program for some buildings, especially regarding with water resistance. For