MultipleMedia supported the Institut de recherche Robert-Sauvé en santé et en sécurité du travail (IRSST) in the design of an interactive and responsive calculation tool. The application, which enables engineers to easily size horizontal lifeline systems (HLS), was developed on a .NET platform, in MVC (model view controller). Connected to a MySQL database, it creates a PDF report on demand that the user can keep using only a few variables.