Visitors in laboratories include anyone other than Georgia Tech lab staff, students, or faculty including custodial, maintenance, administrative, and Environmental Health and Safety personnel.  It also includes family members and visitors from outside the university including visiting students and researchers.

The warning sign on the lab door is intended to inform all visitors that they are entering a hazardous work area and they are required to comply with all applicable safety rules and precautions, such as wearing safety glasses and being alert to the potential hazards in the area.