Changing the way OSH management is performed with BIM is relevant. Several authors propose that real world cases need to be studied as there are few examples of studies covering BIM implementation for OSH. The UK PAS1192:6 introductory standard indicated some of the requisites and approaches to implementing BIM for OSH. Lessons from projects that have already implemented PAS 1192:6 will provide valuable inputs. This paper explores the stakeholders' perceptions about benefits and barriers of adoption of BIM for OSH purposes using examples from a complex large project (Thames Tideway Tunnel). The methodology adopted was a survey of 39 project participants. The study focused on the following areas: collaboration, risk assessment, training and awareness, inspection of workplaces, work accidents, budget control, error detection, liaison between logistics and productivity. The implementation of the new BIM based approach to construction OSH management in this project 4º CONGRESSO PORTUGUÊS DE BUILDING INFORMATION MODELLING