thereof integrally attached as by welding or the like to adjoined cross brace members near the juncture of the end sections 52 54 and the central section 26 preferably the bars are attached to the end sections 52 and 54 as shown in fig2 but other locations of the hanger bars can be used the hanger bars span each cross brace section corner section as defined by the abutting end sections 52 and 54 as discussed above the alternator shaft as and the alternator a should be perfectly plumb with respect to the drive shaft or perfectly aligned and colinear therewith for efficient reliable plant operation the plant disclosed herein includes an alignment means 60 to ensure proper alignment between the alternator the alternator armature shaft and the drive shaft the alignment means 60 includes a plurality of wedge blocks 70 wedgingly interposed between the alternator a and each stub tower corner rail the function and operation of these wedge blocks will be fully set forth after presentation of a description of the structure thereof as best shown in fig3 and 4 each wedge block is elongate and in the shape of a frustum of a truncated irregular pentagonal cone thus as shown each block includes a planar base 72 and a planar top 74 which are in spaced parallelism with respect to each other each of the blocks further includes an arcuate rear face 76 which is curved to fit snugly against the curved alternator casing a pair of trapezoidal side faces 78 and 80 form the sides of each block and a pair of edge adjoining rectangular front faces 82 and 84 are each joined at one longitudinal side edge thereof to one of the side faces and at.