(1) Cattle guards and cattle chutes (see ARM 38.4.411 (4) and (5) .)

(2) Hand rails on bridges and trestles (see ARM 38.4.411(4) .)

(3) Switch boxes, switch operating mechanism necessary for the control and operation of signals and interlockers projecting four (4) inches or less above the top of the rail require a minimum clearance of three (3) feet.

(4) Mail cranes and train order stands when not in operative position require a minimum clearance of eight (8) feet six (6) inches.

(5) Oil columns require a minimum clearance of eight (8) feet (see ARM 38.4.411(4) and (5) .)

(6) Poles supporting trolley contact require a minimum clearance of eight (8) feet three (3) inches. Conductors supplying motive power to track affected--of bracket construction.

(7) Poles other than trolley poles require a minimum clearance of eight (8) feet six (6) inches.

(8) Signals and switch stands three (3) feet high or less when located between tracks where not practicable to provide clearances otherwise prescribed in this order require a minimum clearance of six (6) feet.

(9) Signals and switch stands other than in (8) above require a minimum clearance of eight (8) feet.

(10) Water barrels on bridges (see ARM 38.4.411(4) an (5) .)

(11) Water columns require a minimum clearance of eight (8) feet (see ARM 38.4.411(4) and (5) .)