Horizontal Curve Elements
http://thomascranelibrary.org/jpg/legacy/fig50.jpg
Slide 7
Gage Measuring Gage
Slide 8
Gage Max Gage allowance 1-3/4 wider Class 4 Operation, 1 max
http://img.photobucket.com/albums/v329/Trainman-2/SCRM%20West%20End/IMGP4575.jpg
Slide 9
Turnouts 3 Groups of Turnouts Lateral Turnouts Equilateral
Turnouts Lap Turnouts
http://s145079212.onlinehome.us/rr/howto/faq/faq_turnouts.htm#lapturnout
Slide 10
Turnouts Bingmaps.com
Slide 11
Turnout Terminology Also See AREMA pp. 89-90 Fig 3-13 from
Armstrong
Slide 12
The Switch Device deflecting wheels of train from track they
are running Switch is portion of turnout from Point of Switch (PS)
to Heel of Switch (HS) Video (model):
http://www.youtube.com/watch?v=FF8YIH160hA
http://www.youtube.com/watch?v=FF8YIH160hA
Slide 13
The Switching Mechanism Hand operated (switch stand) Power
operated (machine)
Slide 14
Frog Permits flange of wheel to cross the other rail
http://static.panoramio.com/photos/original/6940512.jpg
Slide 15
Frog Types Rail Bound Manganese (RBM) Spring Frog Solid
Manganese Self-guarded Frog Bolted Rigid Frogs Movable Point
Frogs
Slide 16
Guard Rails
Slide 17
Railway Crossovers and Crossings Crossovers can be considered
as two turnouts Crossing consists of 4 frogs (2 intersecting
tracks)
Slide 18
Railway Crossovers and Crossings Slip Switch: combination of
small angle crossing with pair of connecting tracks within limits
of crossing
Slide 19
Railway Crossovers and Crossings Information needed to design
crossings See AREMA pp. 105-6 Specialty manufactures design these
features Train Crossing Frog:
http://www.youtube.com/watch?v=jeWxWkTlsUE
http://www.youtube.com/watch?v=jeWxWkTlsUE How they work:
http://video.google.com/videoplay?docid=2853660703765713140&ei=xnFeS-
28K5jqqwKsyI3oCg&q=Railroad+Frog&hl=en&client=firefox-a#
http://video.google.com/videoplay?docid=2853660703765713140&ei=xnFeS-
28K5jqqwKsyI3oCg&q=Railroad+Frog&hl=en&client=firefox-a#
Slide 20
Highway Crossings Renewal of Crossings are Expensive Public
Safety is Serious Concern