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Module 7: Basic Track – Part II

Module 7: Basic Track – Part II. Special Trackwork. Module Objectives. Recognize Complex Track Components Understand Their Function Familiarity with Terminology. Turnouts & Crossings. Frog. Switch. Turnout Details-Switch. BENT STOCK RAIL. SWITCH HEEL. DIVERGINGSWITCH POINT.

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Module 7: Basic Track – Part II

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  1. Module 7: Basic Track – Part II Special Trackwork

  2. Module Objectives • Recognize Complex Track Components • Understand Their Function • Familiarity with Terminology

  3. Turnouts & Crossings Frog Switch

  4. Turnout Details-Switch BENT STOCK RAIL SWITCH HEEL DIVERGINGSWITCH POINT STRAIGHT SWITCH POINT STRAIGHT STOCK RAIL SWITCH RODS RAIL BRACES SWITCH PLATES SWITCH MACHINE OPERATING ROD HEAD BLOCK TIES

  5. Switch Points AREMA Portfolio Plan 221

  6. Stock Rails Samson Undercut

  7. Switch Plates AREMA Portfolio Plan 223

  8. Rail Braces AREMA Portfolio Plan 223 WEDGE

  9. Head Block Timber

  10. Switch Heel SPREAD

  11. Vertical SMJ Rods

  12. Horizontal Rods

  13. Operating/Throw Rod Operating Rod No. 1 Rod Basket Front Rod

  14. Switch Machine/Stand Dual Control Switch Machine Switch Stand

  15. Turnout Details-Frog FROG GUARD RAIL CURVED CLOSURE RAIL GUARD RAIL STRAIGHT CLOSURE RAIL Straight Lead Rail SWITCH TIMBER CURVED LEAD RAIL

  16. Closure Rail Curved Lead Rail Straight Lead Rail Curved Closure Rail Straight Closure Rail

  17. Frog Types • Rail Bound Manganese • Bolted Rigid • Self Guarded • Spring Rail • Moveable Point • Flange Bearing POINT TREAD FLANGEWAY

  18. Rail Bound Manganese AREMA Portfolio Plans 612 to 691 INSERT BINDERRAILS

  19. Bolted Rigid Frogs AREMA Portfolio Plans 320-390 GUARD RAIL GUARD RAIL Self Guarded Frog

  20. Bolted Frog Milling CONTINUOUS RAIL MILLED RAIL

  21. Self Guarded Frogs AREMA Portfolio Plan 671 SOLID CASTING

  22. Spring Rail Frogs HORN AREMA Portfolio Plans 401 to 490 HOLDDOWN HOUSING SPRING WING RAIL

  23. Moveable Point Frog MOVEABLE POINT KNUCKLE RAIL

  24. Flange Bearing Frog

  25. Frog Details AREMA Portfolio Plan 618-89

  26. Turnout Size and Speed Turnout size is ratio of length to spread measured at the frog: 2” 3” 9” Number 9 The higher the ratio, the smaller the angle, thus the higher the speed. General rule of thumb: Double the size and round off to get the speed through the turnout (straight move speed is not affected on a tangential turnout)

  27. Purpose of the Guard Rail Not all turnouts require guard rails: self-guarded frogs, moveable point frogs

  28. Frog Guard Rails AREMA Portfolio Plans 502 to 590

  29. Switch Ties AREMA Portfolio Plan 912 Timber Concrete Steel

  30. Turnout Types Lateral Equilateral Lap Slip Switches

  31. Lateral Turnouts AREMA Portfolio Plans 910 and 920

  32. Equilateral Turnouts

  33. Lap Turnouts AREMA Portfolio Plan 925-02

  34. Double Slip Switch AREMA Portfolio Plans 818 to 836

  35. Turnout Geometry AREMA Portfolio Plan 910-12 PLAN VIEW

  36. Turnout Geometry Data AREMA Portfolio Plan 910-12

  37. Crossings Railroad Crossing • Two tracks crossing each other, sometimes referred to as a “Railroad Crossing At Grade”. The combined hardware is a “Diamond”. Road Crossing • Where a railroad and highway cross at grade. Also called an “At-Grade Crossing” or “Highway/Rail Intersection”

  38. Railroad Crossing AREMA Portfolio Plans 700 to 793

  39. OWLS (One Way Low Speed) Frog

  40. Crossovers Two turnouts on parallel tracks that allow trains to cross over from one track to the other AREMA Portfolio Plan 912

  41. Hump Yard Retarders

  42. Derails AREMA Portfolio Plan 213 SWITCH POINT HINGED SLIDING SLIDING

  43. Bridge Trackwork SLIDING JOINT MITER RAILS IINNER GUARD RAILS OUTER GUARD RAILS

  44. QUESTIONS?

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