当进行结构评估以确定承载力时，需要了解构件尺寸、加固细节和材料特性。如果无法通过图纸文件记录获得这些信息，则需要通过现场测量和取样获得。

When a structural evaluation to determine capacity is to be performed, knowledge of member sizes, reinforcing details, and material properties is required. In cases where this information is not readily available through drawing document records, it needs to be obtained through in-place measurements and sampling.