as illustrated in fig4 one pin 19 is mounted in the bracket pair 17 and the other pin 24 is mounted in the bracket pair 22 this mounting may be in a conventional manner and may include the use of a cotter pin or the like to secure the pins in place the support pins 19 and 24 are mounted so that the centers thereof are co linear with the center of the horizontal clevis pin 20 the clevis pin 20 illustrated in fig4 may be the same as the pin 50 illustrated in fig3 in fig4 the broken line 21 illustrates the co linear positioning of the support pins 19 and 24 with the horizontal clevis pin fig5 illustrates the pier side portion 27 of the stabilizer which is comprised of a left support arm 28 and a right support arm 29 which extends outwardly from the pier side portion 27 these arms extend at a slight angle as illustrated in fig5 and 6 the left support arm 28 is affixed near the left edge 30 and inclined toward the right edge 31 the right support arm 29 is affixed near the right edge 31 and is inclined toward the left edge 30 the horizontal surfaces of the support arms 28 and 29 define a.