Abstract：
In the field of the safety appraisal of existing building，studies have been conducted within the structural safety assessment of buildings in this paper. Specifically, this paper explores how to evaluate load and material strength in structure checking, especially for buildings which are seriously deficient in structure checking but intact in appearance. The paper suggests that structural calculation and analysis should be adjusted according to results of site testing and present situation of buildings，while effect of plastic internal force redistribution, moment modulation at column side and other factors on structure checking should be considered for statically indeterminate structure, which makes safety appraisal of buildings objective and avoids unnecessary cost.
