The paper develops the basic system of state - appraisal method aiming at monolayer steel structure workshop ; according to the influence factor of structural reliability , the paper also establishes the appraisal index and gradation principle to the effect foundation column - system roof covering - system and crane girder - system ; the appraisal method of main index of unit section ' s shortening surface temperature and deformation is especially researched ; the integrated appraisal method of structural reliability of industrial building is set up on the basis 论文针对单层钢结构厂房，首先建立了状态评定方法的基本体系：根据结构可靠性的影响因素，进一步建立了作用、地基基础、柱系统、屋盖系统、吊车梁系统的评定指标和分级原则；专门研究了构件截面消弱、表面温度、构件变形等主要指标的评定方法；在此基础上，建立了厂房结构可靠性的综合评定方法。
