Reference core position calculation device for elevator and reference core position calculation method

A reference core position calculation method executed by a reference core position calculation device that calculates a reference core position of an elevator shaft in which an elevator is to be installed, wherein

• the reference core position calculation device
• measures a dimension of each portion of the elevator shaft,
• calculates portion dimension values of the elevator shaft based on the reference core position and the measured dimension of each portion, and
• determines, when the reference core position is a first reference core position, whether portion dimension values of the elevator shaft calculated based on the first reference core position satisfy a predetermined specification, and
• when the reference core position calculation device determines that the portion dimension values of the elevator shaft calculated based on the first reference core position do not satisfy the predetermined specification, the reference core position calculation device calculates a second reference core position which serves as the reference core position and at which portion dimension values of the elevator shaft satisfy the predetermined specification.