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MS-1.1 Module Standards, Narrow Gauge

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Modules built prior to the acceptance of these Standards will be exempt from these Standards. However, if non-conforming modules are to interface with conforming modules, a Transition module will be required to accommodate any difference in trackage, electrical, etc.

Scale Height From Floor To Top of Rail Hand Laid or Commercial Rail Code Interface Track Clearances
H=Horiz
V=Vertical		 Track Center Lines from Front of Module Track Centers Parallel Tracks Track Setback From End of Module Center Lines on Curves
* denotes change from previous issue.
Zn-3
*		 40"
(1016mm)		 60 H=15/32"
(12mm)
V=1-19/64"
(33mm)		 5" Single
(127mm)
6" Second
(153mm)		 1"
(25mm)		 2-3/16"
(55mm)		 1"
(25mm)
Zn-3 n/a at this time. Figures included for possible future use.
Nn3 See Note
n1 & nA		 60 n2 nB
*		 H=19/32"
(15.1mm)
V=1-21/32"
(42.1mm)		 2" Single
(50.8mm)
8-1/2" Second*
(215.9mm)		 1"
(25mm)		 2-3/16 nC
(55mm)*		 1"
(25mm)
HOn2 40"
(1016mm)		 70 n3 H=3/4"
(19mm)
V=2-1/8"
(54mm)		 6" Single
(152.4mm)
7-11/16" Second
(192.3mm)		 1-11/16"
(42.9mm)
*		 4"
(101.6mm)		 2"
(50.8mm)
HOn2-1/2 40"
(1016mm)		 55
(9mm ga)		 H=1-1/32"n4
(26.2mm)
V=2-3/16"
(55.6mm)		 5" Single
(127mm)
6-13/16" Second
(169.6mm)		1-13/16"
(46mm)		 2"
(50.8mm)		 2"
(50.8mm)
HOn3 40"
(1016mm)		 70 n3 H=1-1/32"n4
(26.2mm)
V=2-11/32"(59.5mm)		 5" Single
(127mm)
7" Second
(177.8mm)		 2"
(50.8mm)		 4"
(101.6mm)		 2"
(50.8mm)
Sn2 42"
(1067mm)		 70
(10.5mm)n5		 H=1-1/8"
(28.6mm)
V=3-3/16"
(81mm)		 6" Single
(152.4mm)
8-1/4" Second
(209.5mm)		 2-1/4"
(57.2mm)		 4"
(101.6mm)		 2-7/16"
(61.9mm)
Sn2-1/2 42"
(1067mm)		 70 H=1-1/8"
(28.6mm)
V=3-3/16"
(81mm)		 6" Single
(152.4mm)
8-1/4" Second
(209.5mm)		 2-1/4"
(57.2mm)		 3"
(76.2mm)		 2-9/16"
(65.1mm)
Sn3 42"
(1067mm)		 70 H=1-1/8"n4
(28.6mm)
V=3-3/16"
(81mm)		 6" Single
(152.4mm)
8-1/4" Second
(209.5mm)		 2-1/4"
(57.2mm)		 4"
(101.6mm)		 2-9/16"
(65.1mm)
0n2 43 1/2"
(1104.9mm)		 70 H=1-7/16"n4
(36.5mm)
V=4-1/4"
(108mm)		 8" Single
(203.2mm)
11" Second
(279.4mm)		 3"
(76.2mm)		 4"
(101.6m)		 3-5/16"
(84.1mm)
0n2-1/2 43 1/2"
(1104.9mm)		 100 H=1-7/8"
(47.6mm)
V=4-1/4"
(108mm)		 5" Single
(127mm)		 3"
(76.2mm)		 2"
(50.8mm)		 3-5/16"
(84.1mm)
0n3 43 1/2"
(1104.9mm)		 83 H=1-7/8"
(47.6mm)
V=4-1/4"
(108mm)		 8"
(203.2mm)		 3-3/4"
(95.2mm)		 2"
(50.8mm)		 4"
(101.6mm)
NOTES: (n1 = note 1., n2 = note 2., etc.)
1. 43" for Nn3 only, if dual gauge (N in front), see NMRA Standard for N (40" height)
2. If code 40 rail is used, it must be brought back to code 60 rail 2" from interface.
3. If code 55 rail is used, it must be brought back to code 70 rail 2" from interface.
4. See note 1, NMRA Standard S-7
5. HOn3 track and wheelsets used as dimensions are correct.
A. Front = 38"; Center = 40"; Rear = 42 1/2"
B. Currently commercial "Z" Scale track is Code 60 and is in general use.
C. This measurement is 1/2 Marklin 4 3/8" straight section.