Useful Reference Tables

Conversions Drawings
Conversion Length (frac/inch/mm) AutoCAD Pen Assignments & Colors
Conversion Speed (MPH/KPH) Orthographic Drawing Reference
  Pantone Color Chart
Physical Properties   
Corrosion and the Galvanic Series of Metals Materials, Design & Tooling
Densities of Common Materials Threaded Fastener Strength & Plating
  Screw Sizes (US & Metric) 
Rail Transit Drill Bit Sizes / Applications
Flammability Smoke & Toxicity Steel Pipe Sizes
FRA Track Classification and Speed Limits Sheet Metal Gauge Thickness
Rail Vehicle Overhaul Considerations Wire Gauge Sizes
Track Clearance Plates