规定了钢筋座和垫片（包括连续钢筋座）的要求，包括强度、永久挠度、可接受公差范围内的制造精度（尺寸和稳定性）、标识/批次/供应商可追溯性和固定。

Specifies requirements for bar chairs and spacers, including continuous bar chairs, and covers strength, permanent deflection, accuracy of manufacturing within acceptable tolerances (dimensions and stability), identification/batch/supplier traceability and fixing.