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【判断题】
某省建公司在公路局宿舍工程中，安装的龙门架20m。9月1日安装到15m高度，临时缆风绳共4根锚在10m高处。9月3日由副班长×××带领4人和部分民工继续安装，先将缆风绳由10m高处移至15m处锚固。9时30分安装到20m高时，突遇一阵强东风。龙门架晃动数次后，将东南方向的缆风绳拉断，龙门架向西倾倒。在高空作业的4人随同龙门架坠落地。副班长×××等3人死亡，1人紧抱在主柱上，造成重伤。后查缆风绳锚固点的水平角度不符合要求，且东南角方向的缆风绳在离锚固点2m处，磨断2/3仍继续使用，其他缆风绳也没有收紧。请判断下列事故原因分析的对错。从事故中可以看出缆风绳在使用前作了认真检查，并采取了相应措施。A.
正确
B.
错误
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