TM 5-628/AFR 91-44
(2) Measure the alinement at each station,
measurements. This average measurement is the
including the beginning point, and average the
approximate degree of curvature.
e. Allowable deviations and operating restric-
deviation from uniform profile on either rail at the
tions.
midpoint of a 62-foot chord.
b. Allowable deviations and operating restric-
(1) At any location where the alinement
tions.
deviation exceeds 2 (2.00) inches, operations shall
not exceed 10 mph.
(1) At any location where the profile
(2) At any location where the alinement
deviation exceeds 2 (2.50) inches, operations
deviation exceeds 4 (4.00) inches, operations shall
shall not exceed 10 mph.
not exceed 5 mph.
(2) At any location where the profile
(3) Operations shall not be permitted over
deviation exceeds 2 (2.75) inches, operations
any location where the alinement deviation exceeds
shall not exceed 5 mph.
5 (5.00) inches.
(3) Operations shall not be permitted over
any location where the measured profile deviation
is greater than 3 (3.00) inches.
12-7. Profile.
a. Definition. Profile is the relative elevation of
the two rails along the track. Profile deviation is the
12-5
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