| guard rail (turnout) | A rail or other device laid parallel to the running rail opposite a frog, to form a flangeway with the rail and hold wheels of equipment to the proper alinement when passing through the frog. |
| guard rail (switch) | A rail or other device laid parallel to the running rail ahead of a split switch and forming a flangeway with the rail to hold wheels of equipment in proper alinement when approaching a closed switch point. |
| guard rail brace | A metal shape to fit the contour of the side of the guard rail and extending over the ties and fastened thereto to prevent moving or tilting of the guard rail away from the running rail. |
| guard rail brace, adjustable | A guard rail brace moving on a tie plate, without disturbing the tie plate and securable thereto, to vary the distance between the guard rail and the running rail. |
| guard rail clamp | A device consisting of a yoke and fastening devices engaging the running rail and guard rail to hold them rigidly in relation to each other. |
| adjustable separator | A metal block of two or more parts acting as a filler between the running rail and the guard rail and so designed as to provide varying width of flangeway. |