By the sample of demolishing the column and widening the span，the processes of analysis and calculation on model are introduced in detail and the way of rebuilding the buildings is offered.

It analyzes reconstruction method of using steel bracket to support roofing system instead of column and removing original bearing column from both design and construction aspects,by introducing the example of supporting frame and removing column.

Column-removed Retrofit Design and Construction of an One-storey Workship Factory;