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Manganese-Steel Frogs

A Railbound Manganese-Steel Frog is constructed with a manganese-steel body casting. This casting is fitted into and between four rails that are specially fabricated from standard tee rails. The assembly is fastened with heat-treated bolts. This type of frog is used for heavy and/or high-speed main line service, where the traffic is approximately equal on both sides of the frog. These frogs are available in three designs of side-wall thickness: light, intermediate and heavy.

A Solid Manganese-Steel Self-Guarded Frog is constructed with guides or flanges above its running surface. These flanges contact the tread rims of the wheels and safely guide the wheel flanges past the point of the frog. Thus, the self guarded frog does not require the use of guard rails. This type of frog is used for yard tracks and main line tracks where the speed does not exceed 30 mph. These frogs are generally available with 3/4" or 1" thick side-walls.

A Solid Manganese-Steel Flat-Top Frog is essentially a one-piece casting made of manganese-steel. This type of frog may be used as an alternative to railbound manganese-steel frog for heavy main line slow-speed traffic. These frogs are generally available with 3/4" or 1" thick side-walls

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