An unequal angle section 200 mm×150 mm×15 mm is to be used in a trus

1.	An unequal angle section 200 mm×150 mm×15 mm is to be used in a truss as a strut of effective length 4.5 m The cross - sectional properties of the section are as follows: Area of cross - section =5025mm2Ixx=2×107mm4,Iyy=9.7×106mm4 and Ixy=−8.3×106mm4By using the table of permissible compressive stress given below, the load on the member should be kN.λ100110120140150160170180σac(Mpa)8072645145413733251.74
Answer» An unequal angle section $200 mm \times 150 mm \times 15 mm$ is to be used in a truss as a strut of effective length 4.5 m The cross - sectional properties of the section are as follows: Area of cross - section $= 5025 m m^{2}$ $I_{x x} = 2 \times 10^{7} m m^{4}, I_{y y} = 9.7 \times 10^{6} m m^{4}$ and $I_{x y} = - 8.3 \times 10^{6} m m^{4}$ By using the table of permissible compressive stress given below, the load on the member should be kN. $\begin{matrix} λ & 100 & 110 & 120 & 140 & 150 & 160 & 170 & 180 σ_{a c} (M p a) & 80 & 72 & 64 & 51 & 45 & 41 & 37 & 33 \end{matrix}$ 251.74

An unequal angle section 200 mm×150 mm×15 mm is to be used in a truss as a strut of effective length 4.5 m The cross - sectional properties of the section are as follows: Area of cross - section =5025mm2Ixx=2×107mm4,Iyy=9.7×106mm4 and Ixy=−8.3×106mm4By using the table of permissible compressive stress given below, the load on the member should be kN.λ100110120140150160170180σac(Mpa)8072645145413733251.74

Answer»

An unequal angle section $200 mm \times 150 mm \times 15 mm$ is to be used in a truss as a strut of effective length 4.5 m The cross - sectional properties of the section are as follows: Area of cross - section $= 5025 m m^{2}$

$I_{x x} = 2 \times 10^{7} m m^{4}, I_{y y} = 9.7 \times 10^{6} m m^{4}$ and $I_{x y} = - 8.3 \times 10^{6} m m^{4}$

By using the table of permissible compressive stress given below, the load on the member should be kN.

$\begin{matrix} λ & 100 & 110 & 120 & 140 & 150 & 160 & 170 & 180 σ_{a c} (M p a) & 80 & 72 & 64 & 51 & 45 & 41 & 37 & 33 \end{matrix}$

251.74

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