FROG CONSTRUCTION:

Bolted Rigid Frogs-Constructed of carbon steel rails with rolled cast fillers, securely bolted together.  While this type of construction may vary from heavy to extremely light duty, the rolled steel rails receive the full impact and wear.

Spring Rail Frogs-Generally used on main lines where the turnout run is infrequently used.  Eliminating the open flangeway in the turnout run reduces impact and wear at the point, and provides smoother operation in the main line.

Rail Bound Manganese Steel Frogs-Designed for maximum severity of service, they incorporate a cast manganese steel center, designed to receive the full impact and wear through the intersection,  Rolled carbon steel rails support the manganese steel center, with arms extending to a point where conventional splices may be able to the connecting rails,  All components, including fillers, are securely bolted with heat-treated bolts.

Solid Manganese Steel Frogs-Completely integrated frogs, cast in one piece from manganese steel.  Such a frog is designed to receive the connecting rails, so necessary straps and special length bolts are furnished with the frog.  The standard joint bars are usually supplied by the User.

Solid Manganese Steel Self-Guarded Frogs-Similar to solid manganese steel frogs, with the addition of raised guards, cast integrally with the frog body.  These are designed to guide the wheel flanges past the frog point.  The design eliminates need for separate guard rails in the track opposite the frog and is used in yards and other locations where speeds are moderate to slow.

The simple turnout frog is a device to enable the wheels running on one track to cross the rail of a diverging track.  It provides continuous channels for the wheel flanges, and supports the wheels over the intersection of the flangeways.  Turnout frogs are divided into two principal classes:  RIGID FROGS, which are without movable parts; and SPRING RAIL  FROGS, in which one wing is moveable.

Solid manganese steel self-guarded frogs can be used to eliminate cost of guard rail installation and maintenance in yard tracks and at terminals where speeds are moderate, and traffic is heavy.

Frog is designed to guide the wheel flanges pas the frog point by means of raised guards which form easy contact with the outside rim of the wheels, deflecting them into proper alignment without shock.

A.R.E.A. has adopted standard plans for solid manganese steel self-guarded frogs of  Nos. 4 to 10, inclusive.