We do use patient/visitor transporters. They move ambulatory individuals only and we also enforce the no-touch rule. They must of course conform to our liability insuror's guidelines as well. No volunteer is allowed to transport without first attending a training course given by our Employee Health Nurse. She certifies them yearly and they are badged so there is no mistake about who can and can not perform the service.
As for the transport of the obese, we handle that two ways. One, we make certain any transporter understands he/she is not required to transport anyone. If they feel they can not handle someone, they have the duty to refuse. Second, the staff is told that if they would not ask their grandparent to do some specific transport, do not ask a volunteer.