The mobile crane (weight = 48 kN) shown in the figure moves across the bridge of length, / = 14 m. The front wheels of the mobile carry the three-quarter of its weight while the rear wheels carry a quarter of its weight. If the distance between front and rear wheel is b = 0.7 m. b A B Determine the position where the maximum bending moment occurs.

Question Three The three-bar truss ABC shown in the figure part a has a span L = 3 m and is constructed of steel pipes having cross-sectional area A = 3900 mm² and modulus of elasticity E = 200 GPa. Identical loads P act both vertically and horizontally at joint C, as shown. (a) If P=475 kN, what is the horizontal displacement of joint B? (b) What is the maximum permissible load value Pmax if the displacement of joint B is limited to 1.5 mm? P A 45° 45° B L (a)

A pin-jointed 2-D truss is loaded with a vertical load of 10 kN as shown in figure. The crosssectional area of the horizontal member is 150 mm² and cross-section areas of the members AC and BC are 200 mm² each. Modulus of elasticity of the truss material is 200 kN/mm². The magnitude of horizontal displacement (in mm, round off to two decimal places) of joint Cis A -6m 10 KN 5 m 4.5 m

Question Three The three-bar truss ABC shown in the figure part a has a span L = 3 m and is constructed of steel pipes having cross-sectional area A = 3900 mm² and modulus of elasticity E = 200 GPa. Identical loads P act both vertically and horizontally at joint C, as shown. (a) If P=475 kN, what is the horizontal displacement of joint B? (b) What is the maximum permissible load value Pmax if the displacement of joint B is limited to 1.5 mm? P P A 45° 45° B woobute L (a)