Methodology of survey of working conditions : an example in watertightness companies

Introduction
This study on renovation sites followed a demand of the regional Trade Union House of the watertightness trades. It has been conducted by a prevention engineer (OPPBTP) and an occupational physician of a occupational health service specialized in construction industry (APST). The objectives were to promote better conditions working in the profession, involve employees, engage the entrepreneurs in improvement actions, complete the evaluation of risks in this profession, initiate an exemplary industry approach and reproducible, relying on the skills of OPPBTP and APST-BTP.

Methods
This study began with bibliographical research, and necessitated a reflection on the relevant indicators to be used. The method developed uses a method of analysis and evaluation of working conditions in construction industry (MAECT) and involves various metrics: measurements of noise, dust, volatile toxics, heart frequencies, questionnaires, observation tools and grids leading also to monitoring indicators. The study on building sites was conducted from situations defined with companies on four worksites. It was followed by a day of exchange and awareness with the operators.

Results
The main changes and reflections focus on grubbing-up tools, lifting equipment, work on the weight and packaging of bitumen rolls, the packaging for insulation, work on less heavy torches and less noisy, research of protective equipment and work clothes adapted to the profession of watertightness, reflections on the organization of the work and developments in the profession.

Discussion
Work on these tracks is still in progress, and led to the creation of a National Committee on prevention and working conditions within the Union House of watertightness firms, including equipment manufacturers. This experience allows to imagine a development of this type of studies for other construction trades; a methodology for further interventions is being finalized. Tools and indicators that have been used will be completed and adapted according to the relevant trades.