# FREMO

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FREMO H0 Individual FREMO module with standardised end profiles and fixing holes Scale 3.5 mm to 1 foot Scale ratio 1:87 Standard(s) H0-Europe (single track) H0-Mainline (double track) FREMO-E (overhead electric) H0-Hafen (industrial) H0fine (finescale) FREMO:87 (finescale) 00fremo (UK 1:76 scenery) Model gauge 16.5 mm (0.65 in) 9 mm (0.354 in)

Many FREMO modules joined together to make a large layout

Meeting during 2010 in the Netherlands with over 1 kilometre (0.62 mi) of track

The **Friendship of European railway modellers** ([German](/source/German_language): *Freundeskreis Europäischer Modellbahner*, **FREMO**) is a modular [rail transport modelling](/source/Rail_transport_modelling) standard. Individual track and scenery modules are built to a common standard and are joined together to make larger [model railway layouts](/source/Model_railway_layout). The FREMO standards were created following a meeting in Europe in 1981.[1]

Single track h0 scale modules are typically 500 millimetres (20 in) wide, of variable length, viewable from both sides. Each module comes with adjustable legs, to create a uniform top-of-rail height of 1,300 millimetres (51 in) above floor level. Modules are physically joined together using three 12-millimetre-diameter (0.5 in) holes and hand-tightened [M8](/source/ISO_metric_screw_thread) wingbolts with [washers](/source/Washer_(hardware)) and [wingnuts](/source/Wingnut_(hardware)). The electrical inter-connection uses two [Banana connectors](/source/Banana_connector) per track bus, over which [Digital Command Control](/source/Digital_Command_Control) (DCC) signalling running at 14 volts is used for train control. Track uses Code 83 rails (2.1 mm or 0.083 inches high), with a minimum curve radius of 2,000 millimetres (6 ft 7 in; representing 175 metres or 575 feet at 1:87) and fixed track centre-line spacing of 46 millimetres (1.8 in; representing 4 metres or 13 feet separation at 1:87 scale).[2]

Some general aspects, such as rigid construction of modules, are derived from the [Normen Europäischer Modellbahnen](/source/Normen_Europ%C3%A4ischer_Modellbahnen) NEM 900 standards published by [MOROP](/source/MOROP).[3] In 1995, the North American **Free-mo** standards were based on those of FREMO, with a number of changes made.[4][1]

## North American standards

In 1994 Chris Palomarez and Art Armstrong at the San Luis Obispo Model Railroad Club (SLOMRC) developed the Free-mo Standard based on the European FREMO concept. [5]

## N-scale variant

In 2004, the traditional Free-mo standard was adapted for N scale (1:160).[6] It uses Code 55 rail at a nominal height of 50 inches (1,300 mm). Curves should not have a radius of less than 22 inches (560 mm) on the main line and use turnouts sized No. 6 or larger.

## NMRA British Region Freemo standard

In 2011 the NMRA British Region released a set of standards called Freemo, Recommended Specifications For HO Scale Modules.[7]

## Australian Model Railway Association standard

The Australian Model Railway Association has a set of standards based on FREMO called the "AMRA Free Form Module Standard." Version 2.4 of the standard was published in July 2024. As of 2024[\[update\]](https://en.wikipedia.org/w/index.php?title=FREMO&action=edit), there are standards for HO and N Scales, with an O Scale version under development in collaboration with the Aus7 O Scale Modeller's Group. The AMRA standard is similar to the FREMO standard, but uses a slightly lower rail height of 1,200 mm and uses M6 wing bolts.[8]

## See also

- [List of rail transport modelling scale standards](/source/List_of_rail_transport_modelling_scale_standards)

## References

1. ^ [***a***](#cite_ref-slaughter-2004_1-0) [***b***](#cite_ref-slaughter-2004_1-1) Slaughter, Robert (8 February 2004). ["Overview"](https://www.nwhs.org/modeling/Free-moGuide.pdf) (PDF). *A Gentle Guide to the Free-mo Standards*. p. 2. Retrieved 1 September 2018.

1. **[^](#cite_ref-fremo-standard-2013_2-0)** ["FREMO H0 – Modular Standard Standard Gauge 1435 mm in 1:87"](https://web.archive.org/web/20190819170053/https://www.fremo-net.eu/en/modular-systems/h0-scale/h0-europe/h0-normentwurf/). *FREMO*. 2013-12-01. Archived from [the original](https://www.fremo-net.eu/en/modular-systems/h0-scale/h0-europe/h0-normentwurf/) on 2019-08-19. Retrieved 2019-08-19.

1. **[^](#cite_ref-barkhoff-2014_3-0)** Barkhoff, Reinhold (21 October 2014). ["Motive für Module"](http://translog.org/pub/MIBA/MIBA-Spezial%20%E2%84%96102.pdf) [Motives for Modules] (PDF). *[MIBA](https://de.wikipedia.org/wiki/MIBA_(Zeitschrift)) Spezial*. No. 102. Archived from the original on 22 October 2014. Retrieved 3 September 2014.

1. **[^](#cite_ref-4)** ["The Official Free-mo Standard"](http://www.free-mo.org).

1. **[^](#cite_ref-5)** ["The Official Free-mo Standard - A Brief History or Free-mo"](http://www.free-mo.org/about/history/).

1. **[^](#cite_ref-6)** ["Free-moN"](http://free-mon.wesleysteiner.com/history.html). *free-mon.wesleysteiner.com*. Retrieved 2021-05-13.

1. **[^](#cite_ref-7)** ["NMRA British Region, Recommended Specifications For HO Scale Modules"](https://www.nmrabr.org.uk/ho-freemo-module-specs/).

1. **[^](#cite_ref-8)** ["AMRA Free Form Module Standard"](https://amra.asn.au/wp-content/uploads/2024/07/AMRA-freeform-standard-2.4.pdf) (PDF).

## External links

- Media related to [FREMO](https://commons.wikimedia.org/wiki/Category:FREMO) at Wikimedia Commons

- [Official website](https://www.fremo-net.eu/en/home)

- [Official website](http://www.free-mo.org)

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