MIL-HDBK-1005/6
Section 7:
TURNOUTS AND CROSSOVERS
Turnouts. The geometry of the turnout is governed by the size of
7.1
the frog. Where commercially owned and operated switching equipment is used,
turnouts shall meet the minimum requirements of the connecting railroad.
Where Navy owned and operated switching equipment is used, No. 8 frogs should
be used. If a smaller than a No. 8 frog is required because of space
limitations, No. 7, No. 6, or No. 5 frogs may be used with caution. Spring
rail frogs shall not be used.
Connecting curves shall have radii greater than
7.2
Connecting Curves.
the lead curve.
Crossovers.
Criteria for crossovers are given below.
7.3
a) Description. Crossovers consist of two turnouts from adjacent
tracks, connected by a tangent or by reversed curves with a tangent between,
placed between the ends of the frogs.
Consider reverse curves only because of space
b)
Reverse Curves.
limitations.
No part of the turnout shall be located on a
7.4
Turnout Location.
vertical curve.
13
Previous Page
