Test method for retractable type fall arresters designed for horizontal use. 
Retractable type fall arresters are designed to protect against falls from a height of people who need freedom of vertical movement.  The practice of fall protection shows that the devices are also used to protect people who work on flat roofs.  This application creates quite different operating conditions for the devices.  In some situations those conditions can be dangerous for users.  The article presents a theoretical analysis of phenomena occurring during a fall arrest with retractable type fall arresters arranged horizontally.  The analysis was verified with laboratory tests.  The article presents a proposal for the construction of a test stand and a test method for estimating retractable type fall arresters intended for horizontal use.