J-Trak

J-Trak Layout

Construction

Here we'll deal with some of the details regarding construction of the tables.

It is important here to bear in mind our requirement for a consistent table height of 72cm, which we discussed earlier.

Table Size

We've started out with a standard table size of 140 x 105cm. This is our standard module. It is exactly four Scalextric standard straights long, by three wide. Most of our module designs are based on this, and it's not a bad size for transporting and storage.

However, the size of each table is not a deal breaker. Your table size can be whatever size fits in your car, or whatever size is convenient for you. It may be important for you to make all your tables the same size, so that they can be stacked and stored conveniently, but they do not have to match anybody else's table size.

There is however, one big advantage to choosing our standard 140 x 105cm table size, which is that we've put together a whole load of track module designs which will fit exactly on that table size, which could save you a lot of time.

Table Top

For the tops of your tables we'd suggest a thin sheet material, strengthened with a simple softwood frame underneath, around the edge of the sheet.

The sheet thickness is about finding the right balance for you. Anything thicker than 9mm would probably be too heavy to handle easily. Thinner materials will obviously be lighter but may require additional support battens.

For the sheet material MDF is ideal, though plywood or OSB are also possibilities. MDF has the best finish and paints well. Plywood is stronger and lighter, and OSB is lighter and cheaper, but the finish is rough.

If you are willing to use more support battens, then hardboard may be used, and would probably be the lightest option.

For the frame we'd suggest 3”x1” planed softwood, which works out at around 70x20mm.

Underframe

There are two ways to support your tables at the required 72cm height.

First, there are commercially available, adjustable legs of the right size which can be screwed in and out. Just search for dining table legs. IKEA 's Adils legs seem to be a popular choice, and are good value for money.

The second option is to make your own underframes, or legs. If you're doing this, then there are commercially available adjustable feet, which can be attached to the bottom of your legs, to give them some height adjustment to account for any inaccuracy or uneven floors.

It's worth bearing in mind that the thicker, or heavier the table top that you use, the more esential it is that the legs are detachable. Otherwise your tables may be too heavy for you to carry, during transport.