IBLS Coupler and Safety Chain Standards

Layout

Couple and Safety Chain Layout

Scale	Gauge	Couple Height (CH)	Chain Offset (CO)
3/4"	3-1/2"	2-1/4
1"	4-3/4"	4-7/16
1-1/2"	7-1/4"	4-7/16" +0" -3/16"	2-1/2" +/- 1/4"
1-1/2"	7-1/2"	4-7/16" +0" -3/16"	2-1/2" +/- 1/4"
1.6"	7-1/2"	4-7/16" +0 -3/16"	2-1/2" +/- 1/4"

References

• Illinois Live Steam 1-1/2" Scale Standards