Abstract: Elevators for use during construction, maintenance and emergency evacuation which ride on rails on the outside perimeter of buildings are proposed. The rails can be on flat or curved walls. Building setbacks may have movable rail sections connecting the setback wall with the outer perimeter wall for the elevator to travel up the side of the building. Trusses on the elevators can support a crane. A turntable on the elevator can work in conjunction with the elevator and the crane to install or remove trusses for supporting the crane. During emergencies people can escape buildings and fire fighting equipment and personnel can enter building using the outside elevators. Construction safety may be improved by use of the easy to assemble, disassemble and move crane. The elevator cars may be easily attached to rails on the outside of buildings when needed and removed, transported and stored when not needed.