Definition - What does D-ring mean?
A D-ring is a D-shaped tie-down ring used as a device to hold workers tightly with a rope or cord to prevent them from falling. A belt with D-rings is fastened around either the middle of the back or the hip area.
A full-body harness is used for personal fall arrest to distribute fall forces across the shoulders, pelvis, and thighs. D-rings on the full body harness are used to secure the position of a worker by restricting movement. Full-body harnesses should be selected on the basis of work being carried out, and there are several types of D-rings used for workers among different industries.
Safeopedia explains D-ring
Types of D-rings include dorsal D-rings, sternal D-rings, shoulder D-rings, and side D-rings. Dorsal D-rings can be found on all safety harnesses worn by workers, and they play a part immediately when a worker falls. However, only one hook should be connected with D-rings to avoid any serious havoc when a fall occurs.
A work positioning system is mandatory for all workers at elevated heights. These workers should use a body belt with D-rings to restrict free fall up to two feet. Some workers need back-mounted D-rings to keep them from reaching a location where free-fall danger exists. Sternal D-rings enable workers to climb a fixed ladder without being connected to an anchor. However, a work positioning system should be used in addition if personnel need to stop and work mid-span. Sternal D-rings can also be used for rescue operations.
Shoulder D-ring harnesses are suitable for construction workers. They are used for work positioning, rescue purposes, and restraint applications. Shoulder-mounted D-rings are used for temporary and portable ladders. Side D-rings are also used for work positioning. According to OSHA guidelines, industries must use such personal protective equipment (PPE) to ensure the safety of workers in a vertical work position.