A steel tie bar of sectional area 125 mm supporting a timber beam. The moment of inertia of the beam section is 1.95 108 mm. Find the axial force in the bar. Total anal 10 weight of the section is 45 kN. Modulus of elasticity for steel = 2 x 105 N/mm and modulus of elasticity for timber 13750 N/mm. Steel tie bar Timber beam 1 = 1500 mm (a) 25.92 kN (c) 34.99 kN = T 3000 mm 45 KN (b) 28.43 kN (d) 36.63 kN