承重墙、梁、柱放线精度要求：±3mm 偏差允许

承重墙、梁、柱边线精度允许偏差为±3毫米。这表示在施工过程中，承重墙、梁、柱的边线位置必须控制在±3毫米的范围内。'The allowable deviation for the alignment accuracy of load-bearing walls, beams, and columns is ±3 (mm) during the construction laying process.' 这句话的另一种表达方式是：'During the construction laying process, load-bearing walls, beams, and columns must be aligned with an accuracy of ±3 (mm) deviation.'