D-Rings Defined
Generally speaking, D-Ring presence and placement determines the suitability of the Full Body Harness for the various fall protection applications. Most manufacturers offer a broad selection of choices when it comes to harnesses; some are job-specific, while others are suited to specific environments. Regardless, D-Ring placement - and usage - is critical when attaching to your Personal Fall Arrest System.
Typical D-ring locations and their intended purposes are as follows:
Dorsal D-Ring Located on the wearer’s back, centered between the shoulder blades, this location is universally appropriate for fall arrest as well as for restraint. Hip D-Rings Located on, or directly adjacent to the wearer’s hips, this pair of D-Rings is intended to support the weight of the user while engaged in work-positioning. Sternal D-Ring Located on the wearer’s sternum, in the center of the chest, this D-Ring is intended to create an attachment point for use on ladder climbing systems or fall arrest systems wherein free-fall is limited to two feet or less. Frontal D-Ring Located at the abdomen, this D-ring is an attachment point typically used in rope access and rappelling.
Shoulder D-Rings This pair of D-Rings, typically located on top of the wearer’s shoulders are utilized in conjunction with a yoke to facility confined space entry and/or rescue so that the user’s body remains upright so as to easily pass through a vertical hatch or man-hole.
Waist/Rear D-Ring Typically located on a belt at or adjacent to the base of the wearer’s spine. This D-Ring is intended only for use in restraint applications.
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