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 序號鋼材類別截面面積計算公式代號說明1圓鋼、圓盤條、鋼絲F=0.7854d2d—外徑2方鋼F=a2a—邊寬3圓角方鋼F=a2-0.8584r2a—邊寬,r—圓角半徑4六角鋼F=0.866a2=2.598s2a—對邊距離s—邊寬5八角鋼F=0.8284a2=4.8284s26等邊角鋼F=d(2b-d)+0.2146(r2-2r12)d—邊 (共 444 字) [閱讀本文] >>