The figure shows a cast-iron bearing block that is to be bolted to a steel ceiling joist and is to support a gravity load of 18 kN. Bolts used are M24 ISO 8.8 with coarse threads and with 4.6-mm-thick steel washers under the bolt head and nut. The joist flanges are 20 mm in thickness, and the dimension A, shown in the figure, is 20 mm. The modulus of elasticity of the bearing block is 116 GPa. The modulus of elasticity of the steel ceiling joist and steel washers is 194 GPa. Determine the members stiffness. Give your answer in MN/m and round off to 3 decimal places.