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单轴对称的角钢、Ｔ型钢压杆有必要做弯扭屈曲验算。计算方法宜采用换算长细比法。利用截面特性的近似值得出单角钢和双角钢构件的实用计算公式。这些公式虽然由弹性稳定理论导出，和非弹性范围内的试验结果也吻合较好。此外，通过对计算结果的分析，建议长细比不大的构件不宜用宽厚比大的型钢规格。
Uniaxial symmetry of the angle of the T-shaped steel bar is necessary to do flexion and torsion test. Calculation method should be used slender method. The practical calculation formula of single angle steel and double angle steel is derived from the approximation of the cross section characteristics. Although these formulas are derived from the theory of elastic stability, they agree well with the experimental results in the inelastic range. In addition, through the analysis of the calculation results, it is recommended that the slenderness ratio is not suitable for the members with slenderness ratio.