GCCEC participated on ATLAS Muon Week Workshop held at CERN, Geneva Switzerland. Participation was demanded by simulation team with whom GCCEC collaborate and provide geometry updates for Geant 4 simulation software packages. GCCEC represents self-developed CATIA_to_XML preparation life cycle and results of detector components study. Coil project include 3 main studies: reproduction of 3D models in CATIA; compare analysis of volumes and mass of reproduced and existing models and integration conflicts checking. Geometry descriptions preparation for New Small Wheel updated construction foresee several volumes of EIL supports; TGC chambers support and frames; MM chambers support and frames; chambers itself here…