Cms/ecal Barrel Construction and Quality Control

The CMS electromagnetic calorimeter is now in its construction phase. The barrel part of this calorimeter consists of 36 super-modules containing in total 61200 PbWO4 crystals equipped with 2 avalanche photodiodes (APDs). Each super-module contains 1700 crystals assembled in 4 modules. The construction of these modules is shared between two regional centres, CERN and INFN/ENEA Rome. Prior to the construction, all the ECAL components follow a strict quality control procedure. In this paper, a presentation of the organisation of the ECAL barrel construction, a status of the construction progress as well as the results of the quality control of some components like crystals and APDs will be given.