Sunday, 1 December 2019

Corrugated warehouse

You might remember I was planning a curved-roof shed for the right hand end of the layout, as shown by various mock-ups.

The building was made out of 40-thou (1mm) plasticard. Basic dimensions were taken from the card mock-up and transferred to the plastic with the help of calipers, and of course a compass - this one is a left-over from university technical drawing classes, and usefully can be fitted with a point at both ends, which was used to scribe the curve.

With the curve already scribed it was easy to cut out, but what about curving the roof? The plastic was taped to something round - a tin mug looked about right - and boiling water poured over it. Once cooled the plastic is nearly the right shape, and is easily to fit.

Here's the same technique being applied to the corrugated sheet - I used Wills clear corrugated material, as I had some in that was starting to go yellow, and it is much thinner than the moulded stuff making curving it possible, and the edges look better.

Back to the shell of the building, the back of the front is given lots of bracing, and the roof/walls piece stuck in place, note how the preformed curve means it is already almost the right shape.

Next  I worked out how to attach the corrugated sheet, the building was too tall for a single sheet to cover it but this thin plastic corrugated sheet can be overlapped, rather like the real thing.

I stuck it on with double-sided tape, sealing the edge with solvent. The corrugated material is a shiny, hard clear plastic that doesn't glue easily, solvent won't stick it together but does hold it reasonably well to the softer white plastic. Over a large area though the double sided tape should be quite strong, and means no warping. Even superglue seemed to struggle, though with patience it was used to hold the top piece in place.

With a quick waft of red oxide primer it can be placed on the layout to see how well it fills the gap - looks OK to me. I'm planning to paint it tar black, which seems most common for such buildings, with a bit of rust showing through. However, my wife rather likes it in red...

I just need to make a door, and get the rest of the painting done, there will also be a brick plinth along the bottom.

I've also been working on the rest of the street along the back of the layout, so more soon!

No comments: