D.C. Mun. Regs. tit. 24, r. 24-3199
When used in this chapter, the following terms and phrases shall have the meanings ascribed:
Approved - approved by the Minimum Wage and Industrial Safety Board.
Board - the D.C. Minimum Wage and Industrial Safety Board.
Clearance between tracks - the shortest distance between the center lines of adjacent tracks.
Height of a freight car - the distance between the top of the rail and the top of the running board.
Overhead clearance - the vertical distance from the level of the top of the highest rail to a structure or obstruction above that level.
Side clearance - the shortest distance from the center line of the track to a structure or obstruction at the side of the track.
Width of a freight car - twice the distance from the center line of the car to the extreme outside part of the car.
D.C. Mun. Regs. tit. 24, r. 24-3199