我厂生产 YKB340—2至 YKB321—2等十几种规格的预应力多孔板。在长期的生产实践和产品质量检验中,发现原楼板的吊钩结构和预埋部位都不够合理,影响了楼板的质量。因此,我们进行了改进,将原来的“Ω”形状吊钩改为“双曲 U 形”吊钩,并且将该吊钩按原预埋方向旋转90°后预埋在离板端20毫米处。从84年9月改进以来,我厂的 Our factory produces more than ten kinds of prestressed perforated plates, such as YKB340-2 to YKB321-2. In the long-term production practice and product quality inspection, it was found that the hook structure and the pre-embedded part of the original floor slab were not reasonable enough to affect the quality of the floor slab. Therefore, we made improvements by replacing the original “Ω” shape hook with a “hyperbolic U-shaped” hook and rotating the hook in the original pre-embedding direction by 90° and then embedding it 20 mm from the end of the plate. . Since the improvement in September of the year of 84, our factory has been