Dimensional Tolerance Control for Prefabricated Building Components
Peng Liu, Ying Chen, Xiaoyong Luo, Zhiwu Yu, and Hao Long
Appears on pages(s):
component; deviation; dimension; prefabricated construction; tolerance
Tolerance is significant for the dimensional precision of prefabricated components. This paper proposes a novel dimensional tolerance control model for prefabricated components that is based on their qualification rate. The distributions of the dimensions of multiple prefabricated components and the partition form of tolerance are also investigated. Component dimensions tended to be normally distributed, and probability plots indicate that the cumulative percentage between prefabricated components and a normal distribution was linear. Prefabricated component dimensions tended to be larger than their designed values due to the swelling of templates during concrete casting. The proposed dimensional tolerance control model was verified by on-site testing. Criteria and methods for applying tolerance partition forms to prefabricated components are put forward through comparison of various standards. The approach overcomes the deficiencies of traditional methods of tolerance control, which are based on experience.