10.00 Track Material

10.01 Rail:
112-lb. to 141-lb. relay rail is required. Rail must meet or exceed AREMA Class I Specifications.

Recommended Rail Grading Classifications

Rail Weight	Maximum Rail Wear (Inches)		Rail Condition
(Class I)	Top	Gage
136-131#	3/16	1/2	Very minor engine burns and corrugation
119-115#	1/8	3/8
112#	1/8	1/4

 

 

 

 

 

 

 

 

 

10.02 Fastenings:

a) Angle or Joint Bars, new or certified, to match rail section used. Industry to provide compromise joint bars or compromise welds to match Union Pacific’s rail section at 13 foot clearance point. (See Exhibit “O” (PDF File)  and Exhibit “O-1” (PDF File) )
b) Tie Plates, new or secondhand, and double shouldered plates no smaller than 2 times the base of the rail. Track to be fully plated.
c) Track Bolts, new or secondhand, appropriately sized for the bolt holes in the rail section with length sufficient for a full nut and heavy?duty spring washers (new).
d) Track Spikes, new 5/8" x 6" or 5/8" x 6 1/4” installed per Exhibit “O-4” (PDF File)  and Exhibit “O-5” (PDF File) .
e) Rail Anchors, new or reformed, box anchored every other tie. All switch ties will be completely box anchored. For crossties that use elastic fasteners, rail anchors are not required.
f) Compromise Joint Bars or Compromise Field Welds shall be utilized when rails of dissimilar rail sections are connected. Turnouts will use the same rail section on the running rail, closure rails, and turnout components through the body of the turnout. It is the Industry’s responsibility to furnish, install and maintain compromise joint bars connecting to Union Pacific owned track. All rail joints and welds should be kept out of grade crossings, where possible. (See Exhibit “O-1”) (PDF File)
g) Insulated Joints/I Bonds to be furnished by Industry and shall be all new material. Insulated joints/I bonds will be installed by industry at locations designated by Union Pacific’s authorized representative. (See Exhibit “O-2”) (PDF File)

10.03 Timber Ties:

Light Traffic	<1000 cars per year	7” x 9”  x 8’ Ties @ 20 Ties per 39 ft. rail (24” on center)
Medium Traffic	>1000 & <2000 cars per year	7” x 9” x 8’6” Ties @ 22 Ties per 39 ft. rail (21.25” on center)
Heavy Traffic	>2000 cars per year	7” x 9” x 9’ Ties @ 24 Ties per 39 ft. rail (19.5” on center)

 

 

 

 

 

a) New creosoted Oak or Douglas Fir ties only for new construction.
b) Only new timber-creosoted switch ties will be used to accommodate turnout pattern.

10.04 Concrete Ties:

Light Traffic	<1500 cars per year	8’ 3”, 600 lb. tie at 26” centers 8’ 6”, 525 lb. Tie at 24” centers 8’ 6”, 700 lb. tie at 28” centers
Medium Traffic	>1500 & <3000 cars per year	8’ 3”, 600 lb. tie at 24” centers 8’ 6”, 700lb tie at 26” centers
Heavy Traffic	>3000 cars per year	’ 6”, 700 lb. tie at 24” centers

 

 

 

 

 

 

 

 

 

 

 

a) Continuous Welded Rail is recommended for use with Concrete Ties.
b) Concrete switch ties may be used where concrete standard ties are used.
c) Concrete ties must be new ties produced in accordance with Union Pacific’s Concrete Tie Specifications for Construction.

10.05 Steel Ties:

All Levels of Traffic

10 mm thickness

8' 6" ties @ 20 ties per 39 ft. rail @ 24" centers

 

 

 

 

10.06 Composite Ties:

Light Traffic	<1000 cars per year	6” x 8” x 8’ Ties @ 20 ties per 39 ft. rail @ 24” centers
Medium Traffic	>1000 & <2000 cars per year	7” x 9” x 8’ 6” Ties @ 22 ties per 39 ft. rail @ 21.25” centers
Heavy Traffic	>2000 cars per year	7” x 9” x 9” Ties @ 24 ties per 39’ rail @ 19.5” centers

 

 

 

 

 

 

10.07 Turnout Components:

All turnout components shall be new or certified reconditioned material. All turnout components in UPRR-owned or maintained track shall be new material supplied by Union Pacific or a Union Pacific approved vendor.

Page last revised on 10/27/03