EXTENSION METHOD OF ELEVATOR SHAFT

摘要

PROBLEM TO BE SOLVED: To provide an extension method of an elevator shaft capable of easily adding an elevator shaft to an existent building. SOLUTION: An elevator shaft unit 16 of precast concrete is manufactured in advance in a factory. The elevator shaft unit 16 is a box-shaped cylindrical member having a height for one story of an existent building 12. The elevator shaft units 16 are stacked and connected in an extension job site. A floor (for example, a landing 14a of stairs) of an existent building and a lower end part of a doorway 16a of the elevator shaft unit 16 are connected by a floor board member 18.