Standard
Name

Standard
Dimension

Maximum
Limit

Minimum
Limit

Minimum
Clearance

Inside Gage
of Flanges

7  1/8

7  1/8

7  1/16

See next line below.

Guard Face
Gage

7

7  1/32

B

1/32

Wheel Check
Gage

Not
Specified

7  9/32

B

See next line below.

Guard Check
Gage

7  5/16

C

7  9/32

0

Outside Gage
of Flanges

7  7/16

7  7/16

B

See next two lines below.

Gage of
Guarded Track

7  5/8

C

B

3/32

Gage of
Unguarded Track

7  5/8

7  7/8

7  1/2
See Note 6

1/16

Flange
Width

5/32

3/16
See Note 5

3/32

See next line below.

Flangeway
Width

5/16

3/8

1/4

1/16

Flange
Height

3/16

1/4

3/16

See next line below.

Flangeway
Depth

11/32

A

9/32

1/32

Wheel Width
 

7/8

1

3/4

Self guarded frogs not used at this time.