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Hints and Tips

Pegging the joints

A very useful trick : pegging the joints

In our modeling trade, there is one thing which repeats to infinity : it's the gluing of one part to another one or the assembly of parts by gluing. On large parts, glued joints are relatively reliable but it is not the same when gluing small size parts which make joints that hardly resist to the first wind blow ! Especially in the smaller scales. Then, you have to resort to pegging, which tremendously reinforce the joint. The matter is to put in place a "peg" between the two part to be assembled which, in addition to the glueing, will make the joint much stronger. This is good for any joint or assembly, whatever they are, and whatever the scale is, as we'll see below.

As an example, here is the assembly of the porch support for the sheriff office which looks as follows :

At right are 5 pieces of wood that will be assembled in the style "end to end" or "edge to edge", which means make joints which will not resist handling for long, with a regular assembly.

Below is a first assembly made using ACC glue which is supposed to resist to handling but which will fail at the first stress.

Here, we drill a 0.6 mm (#72) hole in the whole assembly (after full drying) :

Then we insert in the hole a 0.5 mm (#75 or 0.02 in) brass wire that we glue using ACC (the slight difference in diameter between the wire and the hole allows the ACC to flow in the joint by capillarity). Note that you can use any size of brass wire, depending upon what you have on hand and what is suited for the assembly, just remembering to make a slightly larger hole for the glue to penetrate by capillarity. The wire is the cut flush with the assembly (and filed, if required).

By repeating this operation for all joints, we obtain an assembly which is very strong and that will become stronger soon...

The same way, we insert and glue a brass wire at the bottom of each piling, which will insert in holes drilled in the sheriff house platform :

The result is an absolutely durable assembly that will sustain handling (if it should break, it will break at any place except at the joints), as we can see below :

My models are full of details and it is not question of having these details fly away at the first wind blow. So, all my detail parts are mounted using the method described above for maximum strength (miscellaneous details, figures, etc...). below is a sample of these details ready to be installed on my layout (a single wire is enough to ensure maximum strength, such as on chairs, for example) :

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A DCC power enclosure

Page created by Jean-Louis Simonet
Last update : 04/08/2012
© 2012, Jean-Louis Simonet