Patent ID: 8251298

Claim:
An installation construction method for boiler facilities in which said boiler facilities comprise: a boiler building configured of a steel structure, and a boiler main unit suspended within the boiler building from top girders disposed above the boiler building, wherein: the steel structure is provided with center steel columns at the width-wise center portion of the boiler building and end steel columns at the width-wise end portions of the boiler building, the central steel columns and end steel columns being symmetric with respect to a vertical axis, the end steel columns located furthest away from the vertical axis; the boiler main unit is divided into an upper portion, a middle portion and a lower portion; the center steel columns of the boiler building are erected and the top girders are disposed above the center steel columns wherein a first level of the end steel columns are erected; the upper portion of the boiler main unit is suspended from the top girders while a next level of end steel columns are added adjacent a next level of center steel columns, providing mechanical reinforcement to the width-wise end portions thereof, the middle portion of the boiler main unit is suspended from the top girders while the another level of end steel columns are further added adjacent another level of center steel columns, providing mechanical reinforcement to the width-wise end portions thereof; and the lower portion of the boiler main unit is suspended from the top girders while the remaining end steel columns are further added adjacent a remaining level of center steel columns, providing mechanical reinforcement to the width-wise end portions thereof, thereby completing the boiler building wherein a height of each level of end steel columns and center steel columns is substantially equal, and the construction symmetrical about the vertical axis.