Rail- Joint Bar

Some rails are joined together by welding, but most rails are connected by means of a bolted splice. There are usually two or three holes drilled in the end of the rails for these splices. The hole spacing pattern is called the "drilling" and is measured from the end of the rail to the center of the first hole, and from the center of the first hole to the center of the second hole, etc. Thus a drilling might be 2-1/2" x 5" or 3-1/2" x 6" x 6".

The standard drillings for tee rails and corresponding splice bars provide for a 1/8" gap between rail ends. Although this construction is satisfactory for railroad track and light crane service, its use in general crane service may lead to joint failure. For best service in bolted splices, it is recommended that "tight joints" be stipulated for all rails for crane service. Although tight joints are not standard for tee rails, we can supply tight joint in the ASCE sections from 30-lb to 85-lb.

The term "splice bar" refers to only one type of connector and frequently is confused with other types. The drawings below provide clarification of the proper term for each type of connector bar.

STANDARD RAIL DRILLING AND JOINT-BAR PUNCHING

 

Tee Rail A B C D E Bar (")

Length

Bar Weight (PR) Bar Punching Common Type
4-Hole 6-Hole FxGxHxGxF
12 lb. ASCE 2 4 - 5/8 57/64 16- 1/8 2.9 - 4 x 4 1/8 x 4 Splice
16 lb. ASCE 2 4 - 5/8 1- 1/16 16- 1/8 3.6 - 4 x 4 1/8 x 4 Splice
20 lb. ASCE 2 4 - 5/8 1- 11/64 16- 1/8 4.2 - 4 x 4 1/8 x 4 Splice
30 lb. ASCE 2 4 - 3/4 1- 25/64 16- 1/8 7.0 - 4 x 4 1/8 x 4 Splice
40 lb. ASCE 2- 1/2 5 - 7/8 1- 9/16 20 12.0 - 5 x 5 1/8 x 5 Angle F. T.
60 lb. ASCE 2- 1/2 5 - 1 1-115/128 20 27.2 - 5 x 5 1/8 x 5 Angle F. T.
80 lb. ASCE 2- 1/2 5 - 1- 1/16 2- 3/16 24 46.0 - 5 x 5 1/8 x 5 Angle F. T.
85 lb. ASCE 2- 1/2 5 - 1- 1/16 2- 17/64 24 47.3 - 5 x 5 1/8 x 5 Angle F. T.
85 lb. CP 2- 7/16 6- 1/2 - 1- 1/16 2- 11/32 22 43.6 - 6 1/2 x 5 x 6 1/2 Angle F. T.
100 lb. RE 2- 11/16 5- 1/2 - 1- 3/16 2- 45/64 22 51.9 - 5 1/2 x 5 1/2 x 5 1/2 Angle F. T.
100 lb. ARAA 2- 11/16 5- 1/2 - 1- 3/16 2- 3/4 22/33 53.5 80.3 5 1/2 x 5 1/2 x 5 1/2 Angle F. T.
100 lb. ASCE 2- 15/16 6 - 1- 3/16 2-65/128 24 63.2 - 5 x 5 1/8 x 5 Angle F. T.
115 lb. RE 3- 1/2 6 6 1- 3/16 2- 7/8 25/36 69.4 99.8 6 x 6x 7 1/8 x 6  x 6 Angle F. T.
132 lb. RE 3- 1/2 6 6 1- 5/16 3- 3/32 24/36 71.0 106.5 6 x 6x 7 1/8 x 6  x 6 Angle F. T.
136 lb. RE 3- 1/2 6 6 1- 5/16 3- 3/32 24/36 71.0 106.5 6 x 6x 7 1/8 x 6  x 6 Angle F. T.
CRANE RAIL                    
104 lb. CR 4 5 6 1 - 1/16 2 - 7/16 34 - 60.2 6 x 5 x 7 - 15/16 x 5x 6 Angle F. T
105 lb.  CR 4 5 6 15/16 2 -13/64 34 - 51.6 6 x 5 x 7 - 15/16 x 5x 6 Splice
135 lb. CR 4 5 6 1-  3/16 2- 15/32 34 - 57.8 6 x 5 x 7 - 15/16 x 5x 6 Splice
171 lb. CR 4 5 6 1-  3/16 2- 5/8 34 - 72.1 6 x 5 x 7 - 15/16 x 5x 6 Splice
175 lb. CR 4 5 6 1-  3/16 2-21/32 34 - 69.4 6 x 5 x 7 - 15/16 x 5x 6 Splice

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