The 4 Wheel Transit Chair is primarily used to transport persons across level surfaces to a place of safety, as it can be used to lift and carry patients up as well as down the stairs. Basement areas can be tricky environments to evacuation from, particularly if there is no lift that can be used safely in an emergency or if there are staircases that require you to go up to reach an exit point. In these situations the 4 Wheel Transit Chair may be more suited to aid the evacuation.