wrench not shown to be used to secure the gauge flangeway spacer 120 to the concrete gauge panel 100 and to allow the gauge flangeway spacer 120 to be adjusted preferably the holes 630 in the inner and outer walls 633 and 632 are the same diameter the concrete nuts 610 and the holes 625 and 630 are preferably spaced every 12 inches on center to secure the gauge flangeway spacer 120 to the concrete gauge panel 100 first the retainer bar 620 is placed in the longitudinal cavity 640 of the gauge flangeway spacer 120 the bolts 635 pass through the holes 630 in the outer wall 632 of the gauge flangeway spacer 120 then through the holes 625 in the retainer bar 620 and lastly through the holes 630 in the inner wall 633 of the gauge flangeway spacer 120 the bolts 635 are tightened on the concrete nuts 610 to secure the gauge flangeway spacer 120 to the concrete gauge panel 100 to replace an old gauge flangeway spacer 120 on a concrete gauge panel 100 first the concrete gauge panel 100 is uninstalled from between the railroad tracks next the old gauge flangeway spacer 120 is removed from concrete gauge panel 100 this is accomplished by removing the bolts 635 securing the gauge flangeway spacer 120 to the concrete gauge panel 100 then a new gauge flangeway spacer 120 is attached to the concrete gauge panel 100 as discussed above finally the concrete gauge panel 100 is reinstalled between the railroad tracks the.