Brian, you ask really good questions. I wish I had the answers. Speaking for myself, I'm a pretty strong person who has handled fairly heavy patients. Whether or not it's safe, it's my preference to transfer patients by holding onto them in bearhug fashion rather than the gait belt(which is always in place as per protocol). I have never lost control of a patient or been in a situation where safety has been jeopardized. That said, I HAVE declined when asked to move patients who I have not felt safe moving. For so many reasons, eqipment or not, I suppose the safe transfer of patients really boils down to the immeasurable value of instinct.
R