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Home > United Facilities Criteria CD 2 > > Figure B-5. general appearance of broken rail
Figure b-4. General appearance of broken base
Figure B-8. rail and Batter

Railroad Track Standards - index
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TM 5-628/AFR 91-44
c. Complete break (broken rail).
of the rail varying anywhere from 2 to 18 inches
apart and usually less than 1/16 (0.0625) inch deep.
(1) Description. A complete transverse
separation of the head, web, and base of the rail.
Although the individual waves (ridges) are usually
(2) Appearance in track. May appear as a
only a short distance apart, the corrugations may
hairline crack running completely around the rail,
extend over a considerable distance (see fig B-6).
usually accompanied by bleeding or a separation of
the rail at the break with one or both of the broken
ends battered down (see fig B-5).
g. Crushed head.
(1) Description. The flattening of several
inches of the rail head, usually accompanied by a
crushing down of the metal but with no signs of
cracking in the fillet under the head.
(2) Appearance in track. Generally appears
as:
(a) Flattening and widening of the head
for several inches with the entire head sagging.
d. Compound fissure. See "transverse defects."
(b) Small cracks in a depression on the
e. Corrosion.
running surface.
(1) Description. The decaying or corroding
(c) In advanced stages, a bleeding crack
of the metal in the web or base of the rail.
may be present at the fillet under the head (fig B-
(2) Appearance in track. Pits or cavities in
7).
the upper base or the web of the rail. In advanced
stages, a significant loss of material is evident.
f. Corrugation.
(1) Description. A repeated wavelike
pattern on the running surface of the rail.
Corrugations develop over a long period of time. A
number of factors contribute to the development of
corrugations with the actual cause dependent on
the track and operating conditions. Corrugations
are not a critical defect.
(2) Appearance in track. Small, hard,
bright, short-pitch ridges along the running surface
B-3






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