J

Joint
A fastening designed to unite the abutting ends of rails.

Joint Bar
A steel member used in pairs for the purpose of joining rail ends together, and holding them accurately, evenly and firmly in position.

Joint Drilling
The spacing of holes in the ends of rails or other track structures to receive the bolts for the fastening of joint bars.

Joint Gap
The distance between the ends of contiguous rails in track.

Joint, Insulated
A rail joint designed to arrest the flow of electric current from rail to rail by means of insulation placed so as to separate the rail ends and other metal parts connecting them.

Jordan Rail
Rails installed between the running rails to aid derailed cars in tracking straight through dangerous areas such as over bridges or beside buildings.