Steam classes


Canadian National
Steam locomotive
classes
4-4-0
	A	-	Driver diameter - 63" and less
	B	-	Driver diameter - greater than 63"
	None	-	Driver diameter - all
2-6-0
	C	-	Driver diameter - 52" and less
	D	-	Driver diameter - greater than 52" up to, and including, 58"
	E	-	Driver diameter - greater than 58"
4-6-0
	F	-	Driver diameter - 52" and less
	G	-	Driver diameter - greater than 52" up to, and including, 58"
	H	-	Driver diameter - greater than 58" up to, and including, 63"
	I	-	Driver diameter - 63" and greater
4-6-2
	J	-	Driver diameter - 70" and less
	K	-	Driver diameter - greater than 70"
4-6-4
	K	-	Driver diameter - all
2-8-0
	L	-	Driver diameter - 52" and less
	M	-	Driver diameter - greater than 52" up to, and including, 58"
	N	-	Driver diameter - greater than 58"
0-6-0
	O	-	Driver diameter - all
0-8-0
	P	-	Driver diameter - all
2-8-2
	R	-	Driver diameter - 58" and less
	S	-	Driver diameter - greater than 58"
2-10-2
	T	-	Driver diameter - all
4-8-2
	U	-	Driver diameter - all
4-8-4
	U	-	Driver diameter - all
Various
	X	-	Driver diameter - all