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预应力Ⅱ、Ⅲ级钢筋螺丝端杆锚具,由于施工简便、可靠,是目前应用得比较广泛的一种锚具。端杆材料选用45号钢居多,因这种材料易得。有关螺杆加工方法,常有以下几种: 根据《钢筋混凝土工程施工及验收规范》GBJ-10-65(修订本)附录八(以下简称原规范): (1)先冷拉再进行切削; (2)先进行切削再热处理。
The pre-stressed II and III reinforced screw rod anchors are widely used as anchors due to their simple and reliable construction. The material for the end rod is 45# steel, which is easy to obtain. The screw processing methods are often the following: According to the “Code for the Construction and Acceptance of Reinforced Concrete Engineering” GBJ-10-65 (Revised Edition) Appendix 8 (hereinafter referred to as the original specification): (1) First cold drawing followed by cutting; ( 2) First cut and then heat treatment.