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Tie plate, base plate or sole plate is a steel plate used between the rail and tie or sleeper. The tie plate increases bearing area and holds the rail to correct gauge. Moreover, rail tie plate can also be used to extend the longevity of a new track installation so that the safety for passengers and railway workers can be better achieved. The tie plate usually works with anchor bolt or railroad spike by sustaining the load of a rail track and transferring part of the load to the tie sleeper so that the rail will be steadier and maintained in the right gauge.
What is AREMA standard railroad tie plate?
It is a kind of railroad tie plate comply with AREMA standard. Rail tie plate, also called rail plate, base plate or solo plates, is a thick steel-made panel which sits between the rails and rail sleepers on a standard railway track. The tie plates can increase the bearing area and hold the rail to keep correct gauge. They are properly fastened to wooden sleepers by means of spikes or bolts and nuts through the holes in the plates.
Specifications of AREMA Standard Railroad Tie Plates
AREMA PLAN# series tie plates are our hot-sales products.
Table 1 Chemical Composition of AREMA Tie Plates
|
Element |
Chemical Analysis Weight Percent |
Product Analysis Weight Percent Allowance Beyond Limits of Specified Chemical Analysis |
||
|
Low Carbon Tie Plates |
High Carbon Tie Plates |
Under Minimum Limit |
Under Minimum Limit |
|
|
Carbon |
0.150min to 0.349 |
0.350 to 0.850 |
0.04 |
0 |
|
Phosphorous |
0.050max |
0.050max |
N/A |
0.008 |
|
Sulfur |
0.040max |
0.040max |
N/A |
0.008 |
Table 2 Category of AREMA Tie Plates
|
AREMA PLAN# |
PUNCH |
DESCRIPTION |
RAIL BASE SIZE |
|
PLAN 3 16.69# |
A&B |
7-3/4”×12” |
5-1/2” |
|
PLAN 4 14.09# |
B |
7-3/4”×11” |
5-1/2” |
|
PLAN 5 17.13# |
A&B |
7-3/4”×12” |
5-1/2” |
|
PLAN 7 20.56# |
A&B |
7-3/4”×13” |
5-1/2” |
|
PLAN 8 23.93# |
A |
7-3/4”×14” |
5-1/2” |
|
PLAN 10 18.76# |
A&B |
7-3/4”×13” |
6” |
|
PLAN 12 22.45# |
A&B |
7-3/4”×14” |
6” |
|
PLAN 12 22.45# |
A |
7-3/4”×14-3/4” |
6” |
Tie Plate Designs for Use with AREMA Rail Sections
|
Rail |
Plate |
||
|
AREMA Rail Section |
Base Widths |
Plan Number |
Length Inches |
|
140RE |
6 inch |
22 |
18 |
|
21 |
16 |
||
|
13 |
14-3/4 |
||
|
12 |
14 |
||
|
11 |
13 |
||
|
|
|
20 |
15 |
|
8 |
14 |
||
|
7 |
13 |
||
|
6 |
12 |
||
|
100RE |
5-3/8 inch |
3 |
12 |
|
2 |
11 |
||
|
90RA-A |
5-1/8 inch |
2 |
11 |
|
1 |
10 |
||
|
Note: Tie plates are double shoulder except for plan number 1 and 2 which are single shoulder. |
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The use of single or double shoulder tie plates can make a more stable track frame and lengthen the service life of wood sleepers. Tie plates are made of punched and sheared hot-rolled steel sections, which can provide proper cant, uniform bearing surface for the rail and get better load distribution to the sleepers. They can hold the rails to keep gauge and provide more uniform wear to rail head and protect against undue wear to the sleepers. Tie plates are designed with a long end to be installed outside of the rails. Single shoulder of tie plate is placed on the field end of the plate. The gauge end of the plate is placed inside of the rails. Single shoulder or double shoulder tie plate is usually made by the hot-rolled, sheared and punched methods. The materials include low carbon steel–AISI 1020, 1030 and high carbon steel–AISI 1045, 1060. In China, the material is usually Q235 steel. Their surfaces are often done black, coating or hot dip galvanized treatment.
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