How To Construct Cuttings - Model Railway Engineer

How To Construct Cuttings

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railway cuttingDoes your railway track lie flat on it’s baseboard? If you answered yes, your model railway is wrong.

Okay, let’s clarify that.

The track of course should be as level as possible but this doesn’t mean the surrounding landscape should also be flat.

Landscapes aren’t flat and if you follow any railway line for even a short distance you’ll quickly notice that the railway cuts through hills or is raised up on embankments to keep the track level as the surrounding landscape rises and falls.

So while your model railway track lies flat it’ll look artificial if it the ground on which it sits is also flat.

What’s needed is to make the ground under and around the track rise and fall with cuttings and embankments to make it look just like real railways even though it’s actually sitting on a flat surface of your baseboard.

I’ll cover embankments in a future article, for now let’s see how to make cuttings in 5 easy steps.

1) Lay The Track

Place the track on the baseboard according to your track plan and secure it down (pins or PVA). I won’t dwell on this as I’ve covered track laying before, suffice to say, normal rules apply and don’t ballast yet.

2) Create The Hills

Now the important bit.

Build the hills either side of the track but leave enough clearance either side of the track for your widest train to pass (the loading gauge).

A simple trick to help with keeping the gap between track and hills wide enough is to Sellotape a pencil to the side of your widest rolling stock and run it up the track so a line is drawn on the baseboard. Then keep the hills outside of this line.

making a railway cuttingActually, make the gap to the hills further than the pencil line.

The walls, bushes and rock fall that will be added later will encroach on this so the actual hill structure (whether Papier Mâché, plaster of paris, wood with a card matrix or in my case polystyrene sheets and Modroc) will need to be set back further than necessary.

For OO I’d add start approx. an inch beyond the line, for N gauge half an inch should be okay.

(Yes, I learnt this the hard way and once had to rip up a whole hill section because I’d put it too close to the track for the bushes to then fit).

When building the hills keep the side facing the track (where the cutting will be) flat and smooth.

As can be seen in the photo to the right of the hills being constructed for the cutting shown above I use part of a polystyrene sheet glued vertically to achieve this but cardboard would work just as well.

This flat section is to provide a surface on which to fix the retaining wall and needs to be only be as high as the side of the hill that lies perpendicular to the track — the wall being there to prevent rocks and soil falling on to the track. If your hill slopes gently down to the track with only a few feet (at 1:1 scale) directly abutting the track your model wall and hence the flat section would need only be maybe a third of an inch high for OO scale.


Extra: Hill Construction

When making the two sides of the hill (on either side of the track) remember that they would have been a single hill before the excavation for the track made. As such they should mirror the shape and height of their other half.

In many cases, the cutting would have been carved through the slope of a hill, so one side of the hill would be lower than the other but the angle of the slope should be roughly the same across the two.

You can see this in the photograph of one of my cuttings at the top of this article. The two sides reflect each other with the side closest to the camera continuing the down slope of the furthest away side. This is for hills that slope, obviously the shape of the hill is completely up to you and if another formation was used you wouldn’t stick to this. I do it simply because it matches the landscape I’m building.


3) Fix The Cutting Walls

With the the track laid and the structure of the hills through which it cuts in place we can start on the walls themselves.

To recap, the walls were built by engineers laying the track to prevent soil, spoil and rocks from the hills falling onto the track. Retaining walls where built to keep the hillside in place and were made from building materials of the time or that which could be easily sourced locally. As such, the finish of your walls should be to scale of your layout and in similar material to other buildings you have.

Luckily, brick paper in different scales and styles are commonly available. Paperbrick.co.uk and texturelib are both good sources. Alternatively, you could find picture of a suitable wall on the Internet (Google Images would be my first starting place), load them into a image editor such as Photoshop and scale them to the right size before printing.  My preferred option is the embossed brick card from Noch. Being embossed this has a depth that gives a more realistic look.

Once you’ve sourced an appropriate brick or stone material cut it to size and shape and paint the top edges and sides a dark brown to hide the inner colour of the paper or card. When cutting, take a look at pictures of real life cutting walls (again Google Images is a great source) and notice how the cutting walls end. They rarely finish squarely, more often having a stepped end or even missing bricks that have fallen away over the years.

Depending on what the hills are made from, PVA glue will usually hold the paper / card to the hill base material (remember the reference to keeping the edges of hills smooth?). For paper / card walls I use track pins to hold them in place while the glue dries. (If you look carefully there’s a track pin still in place in the top picture).

Note: Not all cuttings have retaining walls, some are just simple slopes down to the track. If this is your preference you can obviously ignore the above. Alternatively, some retaining walls are just exposed rock or made of wood or other material (concrete etc). For these the above remains the same, just change the material printed on the card.

4) Add Weeds / Vegetation

Take a look at any of the cutting photographs on Google Images and you’ll see the plants and vegetation of the hills creep onto and through the walls.

Use your preferred bushes and position them so they overlap from the hills to brick work. The overlap is important as it not only looks natural but also covers up any ugly gap between your wall material and hill side.

5) Finish With Trackside Decoration

Finally, I some slimy green colour paint on the base of the wall and ground where a drainage ditch would most likely have run and place a few small bushes in the corners (being careful to leave clearance for the rolling stock) and add then ballast.

Finally, I like to top off with ballast near the wall with mud and sand colour paints and a small amount painted scatter to simulate rock fall from the hills at the foot of the walls.

If the retaining walls are on the approach to a tunnel I also apply a dry coat of soot black paint around the upper sections of the walls where smoke from the steam locos would have built up. This is just personal preference as my layouts capture the decay and dirt of many steam era industrial operations.

That’s it: cutting construction complete.

Now just finish off the hills with static grass (how to lay static grass) or your preferred surface material and you’re done.

I’ll cover embankments shortly so check back soon on join up to get my free newsletter and get it automatically when it’s posted here. If you’re working on your track take a look at my recent post on tools for track work that will make life easier.



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