//(Design against Static Load) Example 4.22
//Refer Fig.4.70 on page 136
//Initial temperature of the steel tube Ti (degree)
Ti = 25
//Final temperature of the steel tube Tf (degree)
Tf = 250
//Length of the tube l (mm)
l = 200
//Area of cross-section of the tube A (mm2)
A = 300
//Joint separation j (mm)
j = 0.15
//Modulus of elasticity of steel E (N/mm2)
E = 207000
//Coefficient of thermal expansion of steel alpha (per degree celsius)
alpha = 10.8 * (10^(-6))