the vehicle typically are not pivotable relative to the hollow rear axle housing 30 usually a pair of resilient spring assemblies not shown is provided between the hollow rear axle housing 30 and the side rails 11 and 12 of the ladder frame assembly supported thereon for the same reasons as described above referring now to fig3 and 5 there is illustrated a first embodiment of a non driving hollow front axle beam 40 that has been manufactured in accordance with the method of this invention and that can be used in the frame assembly and suspension system 10 illustrated in fig1 as shown therein the hollow front axle beam 40 is hollow and has a generally circular cross sectional shape throughout most of its entire length if desired end portions 41 of the hollow front axle beam 40 can extend at an angle relative to the central portion thereof a pair of hollow cylindrical supports 42 may be secured to the end portions 41 of the hollow front axle beam 40 such as by welding or other means the supports 42 are provided to facilitate the pivotable connection between the steering knuckles 21 and the ends of the hollow front axle beam 40 in the manner described above a pair of mounting pads 43 may also be secured to the hollow front axle beam 40 such as by welding or other.