一、如圖吊物架,設計支撐柱(橫桿強度無虞),材料強度為 200 MPa,L = 500 mm, H = 2000 mm,b = 100 mm,h = 100 mm,t = 5 mm,承受負載 F=10 kN,柱截面如圖:
⑴請問吊物架安全係數若干?