92 Ill. Adm. Code 1500.230
Switch Stands
Section 1500
Section 1500.230 Switch
Stands
a) Main Tracks. Main track switch stands exceeding 2 feet 10
inches in height and not exceeding 4 feet in height shall have horizontal
clearances of not less than 8 feet from the centerline of an adjacent track to
the nearest part of the switch stand above the base of rail; and not less than
8 feet 3 inches when the switch stand exceeds 4 feet in height.
b) Subsidiary Tracks. Subsidiary track switch stands exceeding 2
feet 10 inches in height and not exceeding 4 feet in height shall be not less
than 7½ feet from the centerline of an adjacent track to the nearest part of
the switch stand above the base of rail; and not less than 8 feet when the
switch stand exceeds 4 feet in height.