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oaeccomforumdetail408850_1html一、钢筋算量基本方法钢筋算量基本方法第一章梁第一节框架梁一、首跨钢筋的计算1、上部贯通筋上部贯通筋（上通长筋1）长度＝通跨净跨长＋首尾端支座锚固值
f2、端支座负筋端支座负筋长度：第一排为L
3＋端支座锚固值；第二排为L
4＋端支座锚固值3、下部钢筋下部钢筋长度＝净跨长＋左右支座锚固值注意：下部r