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On3/On30 2-5 stall large engine house

  • On3/On30 Through-Stall engine house.
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Product Description

On3/On30 2-5 stall Large Through-Stall Engine House Kit

Semi-custom: 2, 3 , 4 or 5 stalls, with options for rear walls.

4 week manufacture time from time of order.

This VERY large structure will house the largest narrow gauge locos in your fleet - or lots of little locos! Originally designed as a "through stall shed" for running maintenance, it can also be used as a traditional engine house.

There is a lot to this kit! Many hundreds of parts and repeated subassemblies. But none of it is difficult to make. step by step instructions with lots of photos and diagrams take you through each sub-assembly and the main assembly. The instructions are in pdf format, not printed. I am a kit maker, not a book publisher!!

I really enjoyed designing and making the 4 stall prototype, which was requested by the lead customer, UK modeller Brian Daly.  

18 1/4" internal stall length.  The largest K classes will fit with room to spare

It can be ordered with 2, 3, 4 or 5 stalls.  3 3/4" track centres.

Door apertures  = 3 1/2" wide (3 1/4" through stall doors), 3 7/8" high

The 4 stall version is shown in the photos, but the kit can be ordered from 2 to 5 stalls.

2 stall: 19"Lx8.5"W,  3 stall: 19L x 12.25"W  4 stall: 19Lx16" W, 5 stall: 19Lx19.75"W

The office and stairs add an extra 1 5/8" on the width.


Main structure is a poplar ply framework, covered with board engraved microply, with laserboard battening added to the "sides"

Side 1 has an office in the apex, 3 flight stairs leading up to it, double sliding doors and 5 windows.

Side 2 is plain batten on board siding with 8 large lower windows and 4 smaller top windows. 

"Front" stalls have non-functioning roller shutters as standard.  These can replaced by hinged rectangular doors (with windows) if desired.

"rear" wall  is semi custom. The standard kit is for one solid wall with a single large sliding door over one of the open ended stalls, and the remaining stalls open with roller shutters.   But it can have all the roads open  with roller shutters or hinged door,  or a second sliding door covering (depending on stalls). After you order I will contact you to discuss if you want alterations. there are too many options to list.

Roller shutters started coming into use from the 1920s and these follow the EBT roundhouse pattern.


Apex has an internal office at one end stall  - with part of of extended outside. Each stall has 4 fixed apex windows and a large roof vent per stall.

The Apex roof is built as one removable piece - held securely in place with its own apex roof framing.

Smoke hoods at both ends of each stall fix to the removable roof frames so you can access the internal space. the inside can be viewed easily through the frames if you choose.

The roof is 1/16mm microply, engraved both sides, but no roof covering is supplied.  A "tar paper" or felt roof is more suitable, rather than shingles - because of its shallow angle.

The square smoke stacks are a design taken from a Pennsylvania engine house. They "plug" onto the top of the smoke stack and so can be fitted whether the roof covering is in place, or just the frames.


The standard kit has an MDF sub-base into which your track is laid.  On3 or On30 - its the same sub-base.

Inspection pits (maximum 3) are included to the kit, though none were fitted in the prototype.

Wood floors? Many engine houses (especially large ones) had concrete floors which can be modelled by skimming plaster or grout over a sealed sub-base. But in our model world it looks nicer with a light wooden floor :) So this is an option. you need to select your guage for the floor - the only thing affected is the wooden floor parts.



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