A circle of SM32 track in the garden.

Steve Cook

Flying Squad
Its been kicking around as an idea for a while this one, last year I'd even got as far as laying out prospective diameter circles to gauge its impact on the garden, then the weather and work took over and I got no further. This year I decided to have a go before getting distracted, helped by the fact that Peco had introduced a 38" radius curve in SM32. The 30" radius curve always struck me as a little on the tight side and therefore a bit limiting, albeit a lot easier to package in my garden. The previous scoping out had showed that a four foot radius curve was simply too large and that something around the 3 - 3.5 foot mark would do the job nicely...indeed the inside curve of the border had been set for a 3' radius curve on the off chance about three years ago.
Peco's set track made the decision easy, no need to buy a rail bender, radius in the right ball park and through Hattons, a cost of £112.
So what am I going to do with it? Its principle aim is to give me a continuous circuit to run my live steam engine on, hopefully when I've got home from work and I can sit on the new bench with a brew on. I'm also up for building at ground level, trying a new track laying method and using the two lines to compare and contrast with a view to establishing what type of garden railway suits me best. The scenic side also appeals with more of a chance to submerge and integrate the line into the garden but I'm getting a bit ahead of the game here, best start at the beginning...
To be fair, I doubt that this is the most interesting 'build' thread you'll ever read, but its more or less the steps I took (in mostly the right order) and serves as much to show what I did as to jog my memory later...

I've skipped the chemically blackening the track bit - it wasn't much fun as the rail can't be removed from the sleepers - so the whole cleaning process is a bit drawn out and awkward, worthwhile but not exciting.

The basic circle of track was then laid out to try out various positions:

In front of the border
Mocking up 1.JPG

Through the border
Mocking up 2.JPG

And what I eventually went for, out the back of the border.
Ignoring both.JPG

The last route minimised the gradient changes of the garden making it easier to keep the line flat. It also increased the distance between the garage and the track which is a bonus given how much I walk around that area, plus it avoided having a border on both sides of the track - no doubt it would look good, but more difficult to maintain with raised narrow borders requiring more frequent watering.

The centre of the circle was marked with a steel tent peg, which when combined with the strong magnet on the end of the tape measure makes marking out nice and easy. Spade in the ground at the inside (35") and outside (41") diameters, move the tape measure around a bit more and repeat. With the lines joined up, remove turf and mock track up to check for tight locations.
Marking out.JPG

When happy, dig down to the depth of the edging strip (165mm in this instance) and realise you haven't got enough room to store all the mud thats appearing! Lay the edging strip in place.
Laying in the edging.JPG

The edging strip was leveled at the highest ground point, this then acting as the reference, marked with two tent pegs.
Level at the high point.JPG

Part two on its way...
 

Steve Cook

Flying Squad
The edging strip was then leveled all the way round, the length of the spirit level at a time. In some respects I'm lucky that I have clay for soil, it makes jobs like this easier as it holds a trench shape well and allows you to stick edging to it with just a little clay at the bottom to act as support.
Working around.JPG

In theory, the ends should meet at the right height.... marvellous :) Time for a celebratory brew to warm up, there was still snow on the ground at this point...
The ends meet.JPG

Repeat the same process around the inside of the trench, referencing the inside edging strip off the outside one to get the height correct.
Repeat around the inside.JPG

Its far easier when the edging strip gets above ground level. Its also worth checking the edging strip is sitting on the desired diameters..
Levels and diameters.JPG

Stand back, admire handiwork.
All edged out.JPG

Confuse neighbour by backfilling trench with large amounts of dug out soil. Tamp down with sledgehammer to give around 4" depth of exposed edging strip.
Backfill and tamp.JPG

Line with weed proof membrane to stop ballast migration and fill with first grade of stones / ballast.
Line and fill.JPG

Neatly trim edges and fold behind edging strip.
Excess Liner trimmed.JPG

Edit photos and write post, stick it on the internet :)

The ballast bed is wider in the area where it cut through the raised part of the border, I'm thinking that I shall be having a large raised area in the centre of the circuit so have made sure any long vehicles are unlikely to hit any retaining walls. I'm also hoping I've made the thing wide enough for a bit of 7/8ths scale whimsy in the future...

Thats the current state of play, tomorrow I need to tamp down the first ballast layer and make sure its flat, then go shopping for a finer, more angular grade of ballast. If I can find some, I might even get the track into position and a test run :D If not, I'll be going down the tip and seeing what ballast I can order on the net, I'll update tomorrow.

Steve
 

Steve Cook

Flying Squad
I do hope that "submerge" is not an unfortunate choice of words, there...:confused:
I'm hoping the track disappears from view rather than the garden :D That area has been waterlogged once in the last 13 years, ironically not last year :eek:

Will the ballast stay loose? Can't get much more prototypical than that!!:thumbs:
Yup, thats the plan :thumbs: My only concern is that the sleepers themselves might not be deep enough to get the full effect of the ballast, my theory is I can order more sleepers to stick to the bottom of the current ones if needed...

Steve
 
K

Kelvin

Guest
Hi Steve - for my 45mm gauge 7/8th line I will be using 15 x 15mm treated SW sleepers with Sunset Valley Code 250 FB rail - the important issue here is the depth of the sleeper, its going to lock into the ballast. Peco SM32 won't - it will sit on the top and be easily displaced . If you insist on using the Peco track - fix a treated SW batten to the underside to give your ballast something to lock against. Your ballast must be sharp & craggy - no pea shingle.

If you want to loose the track top dress it with Rolands mix - equal measures of cement, sharp grit and fine peat - then spray it with diluted cow manure mix or even milk to start the algae growing - do this last thing - just before you leave the country.....

Have fun

Kelvin
Ashendon
 

Steve Cook

Flying Squad
Hi Kelvin :)
I like the sound of your line to be, can I hassle you now for photos during its construction please...

It sounds I need to bring my sleeper enhancement plan forward, thank you for the heads up - I'll add strip wood and preservative to todays shopping list.

If you want to loose the track top dress it with Rolands mix - equal measures of cement, sharp grit and fine peat - then spray it with diluted cow manure mix or even milk to start the algae growing - do this last thing - just before you leave the country.....
:D Neighbours will be delighted about the whiff after I've left, it'll be alright, won't smell bad for too long...
Will do :)

Steve
 

Neil

Western Thunderer
Very good Steve, now what about a branch heading off under the timber viaduct to the rear?
 

Steve Cook

Flying Squad
Ah, you've spotted the possibility of enhancement Neil :)
Once the main drag is up and running I'll ponder the options for both permanent and temporary extra tracks - if I can pick up a couple of the 38" radius Peco points at the 16mm show later this month then I may grab a few lengths of flexi too and have a play around.
As long as the grass is short I don't see why tracks couldn't go down on a Friday evening and stay until Sunday...round in circles during the week and shunting at weekends :D
Steve
 

Steve Cook

Flying Squad
Yesterdays update today :oops:

No joy finding the right sized ballast yesterday, I tried all of the local DIY emporiums, the garden centres and the nurseries - I can get 2-5mm pea shingle, but not anything remotely sharp edged. Wickes list (link refuses to accept url tags at the moment, sorry) something that looks great in the photo but they don't mention a size and the nearest stockist was 15 miles away, I couldn't get an answer on the phone either, so no further progress. www.wickes.co.uk/silver-granite-chippings-major-bag/invt/154038/

I did manage to dig out the centre of the circle, add a bag of sand for drainage and some compost to improve its base value over lumps of clay, never thought I'd be saying it, but I need more earth :D

Bigger Border.JPG

Whilst the weather was dry the shed was emptied, tidied, painted and the hoarded rubbish taken to the tip. On the way back I popped into the local nursery to be greeted with "Are you looking for anything in particular?"
"Mind your own business" was my cheery reply.
"Straight ahead, third greenhouse on the right" was hers :D

Unlikely to be the first or last time that lines been used, but at least she had the good grace to laugh about it rather than take offence! Said plant will be used to cover the cuttings and provide a low lying, small leafed, green ground cover beneath the trees I want to plant. I picked a couple of different shades, they are being kept indoors for the moment until the chances of frost have reduced.

MYOB.JPG

Steve
 

JimG

Western Thunderer
No joy finding the right sized ballast yesterday, I tried all of the local DIY emporiums, the garden centres and the nurseries - I can get 2-5mm pea shingle, but not anything remotely sharp edged. Wickes list (link refuses to accept url tags at the moment, sorry) something that looks great in the photo but they don't mention a size and the nearest stockist was 15 miles away, I couldn't get an answer on the phone either, so no further progress. www.wickes.co.uk/silver-granite-chippings-major-bag/invt/154038/

Steve,

Possibly fish tank gravel?...I'm sure I remember a sharp edged gravel when we had fish tanks many years ago. You might have to disguise the colour with the cow dung wash. :)

Jim.
 

daifly

Western Thunderer
Steve

Have you looked for Alpine grit? Used as a mulch in alpine beds and seen adorning the tops of potted alpine plants in garden centres, it is typically bagged as 2 - 6 mm sharp quartzite grit in shades of pink, brown and cream!

Dave
 

Phill Dyson

Western Thunderer
Horticultural grit was the nearest I came up with for ballast Steve.....I used it with a dry mix of sand & cement.

One garden line I read about mentioned using tennis court gravel, but I haven't a clue where it could be bought from :confused:

Phill :)
 

Simon

Flying Squad
I have sieved various products from builders merchants to get my ballast, try "granodust" if any merchant's got any, or the grit used by flat roofing contractors, it's a bit too big for G1 so should be just right for your 16mm line-ette. Don Froud used it on his (G1) line.

My friend Dennis has just dropped off a bag of Scottish granite in the shop for me to sieve/try, in any case you're welcome to have any of my stuff but I'm a few miles away and postage would be silly money:eek:

Simon
 

Steve Cook

Flying Squad
Thanks for the thoughts and suggestions gents :thumbs:
Just done a quick fag packet style calculation, apparently it works out I need about 150kg of the stuff! Blimey, maybe I should put down some more larger stuff first:D

You've given me some extra channels to explore though as a result of searching the web, not sure bright pink fish tank gravel at £4/kg is going to win, but a couple of gravel suppliers have turned up around the Northampton area - I'm wondering if the grit used to surface roads might be suitable too.

Steve
 

daifly

Western Thunderer
Steve

Looking at your Wickes link, I suspect that the Silver Granite Chippings might be worth a punt. At £3.49 for a 25kg bag, your 150kgs is only going to set you back £21 plus round-trip petrol. With that load on, you might want to use a slightly more suitable vehicle than the Caterham!

Cheers

Dave
 

Steve Cook

Flying Squad
Steve
Looking at your Wickes link, I suspect that the Silver Granite Chippings might be worth a punt. At £3.49 for a 25kg bag, your 150kgs is only going to set you back £21 plus round-trip petrol. With that load on, you might want to use a slightly more suitable vehicle than the Caterham!
:)) Definitely not the steed of choice Dave :)
Wickes in Kettering are open at 7 on Saturday morning so I'll aim to get there around opening time, it'll be quiet on the roads and if the grit turns out to be unsuitable I can at least pick up some compost and a few other bits so the journey isn't wasted. I'll be back home for an 8am brew and ready to do stuff in the garden....of one sort or another!

Steve
 

Osgood

Western Thunderer
Steve - I think you may find CHICK GRIT or POULTRY GRIT ideal. It is invariably flint gravel (typically pea shingle) crushed specifically to give an angular product and the size should be spot on for you. Put it through Google to find a supplier to your local poultry industry who can supply that sort of quantity in 25kg at the right price. Available in various grades.

A company called Chick Grit used to crush pea shingle near me - long since gone but I remember seeing the product when visiting ( I seem to recall we were supplying pea shingle to them) and thinking 'model railway ballast' at the time!!
 
S

Simon Dunkley

Guest
:)) Definitely not the steed of choice Dave :)
Wickes in Kettering are open at 7 on Saturday morning so I'll aim to get there around opening time, it'll be quiet on the roads and if the grit turns out to be unsuitable I can at least pick up some compost and a few other bits so the journey isn't wasted. I'll be back home for an 8am brew and ready to do stuff in the garden....of one sort or another!

Steve
Check that they have it in stock before setting off - voice of experience here...
 

Steve Cook

Flying Squad
Made it back for an 8am brew :)
A good selection of various chippings in store, alas the Silver Granite Chipping size is about 10-15mm ( the only small stuff was pea shingle).
Took a punt this morning...failed. For future reference, nothing that Wickes do is suitable - well, not for below 7 1/4" anyway...
Thanks for the additional suggestions Osgood, I shall do some more surfing during my multiple tea breaks today.

Right, its not raining, which means its time to do something outside - best dig in the next two bags of compost then...
Steve
 
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