Based on an example of adding stories project,the advantage of adding stories using battened plate beam is analyzed.

Using the economic appraisal method for reforming projects proposed in this paper,an economic analysis for the adding stories plans of a group of six brick\|concrete buildings is made.

Through the discussion on the transformation engineering of an office building with brick-concrete structure added from 3 storey to 6 storey, this paper points out that the jacket frame structure can be used when the whole stiffness of original building s upper part is lower for the purpose of storey adding.

Integrating with engineering examples,some kinds of representative structur e types of enlargement in floors are given.

This paper points out the merits and demerits and problems to be noticed of building enlargement in floors with author s experience.

In design and constrution of storey increase and renovation project for a single storey factory building,bearing capacity systems and various forces acted upon the renovated sections of increased storeys are far different from those forces acted upon its original single storey fartory building.

The microstructure of the fusion zone and the changing rule of the carbon-enriched zones in aging 0Cr6Mn13Ni10MoTi/1Cr5Mo dissimilar welded joints were studied by optical microscope and scanning electron microscope (SEM).