发布时间:2025-02-01 11:17:28
电缆套官的型号与电缆截面相关,也与成品外径.
一般来说,电缆的截面不得大于电缆套管的内截面40%.
电缆的截面=成品外径的平方*0.7854.
电缆套官的内截面=内径的平方*0.7854.
跨度6米5250500的悬空梁下4根25筋上4根18筋腰筋2根12的现浇板梁可以承受2层高33m的砖混吗
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