An L girder has an advantage over an ordinary length of timber of the same thickness. The method is called L-Girder construction because the main support consists of L-Girders rather than rectangular frames.Īn L girder is so called because it is shaped like the letter L. This method also has the advantage of avoiding the need to screw into end-grain timber without the need to use fancy joints. If a permanent open top layout is to be built then an alternative baseboard construction method is possible which not only reduces the amount of timber required but also allows a layout of almost any size and shape to be produced. The major disadvantages are the quantity of timber required for its construction and the limitations that it places on baseboard shape. This method of baseboard construction can be used for any style of layout (permanent, portable, or anything in between). If gradients are to be included then a section of the baseboard top is fitted to the top of risers attached to the crossmembers. Finally the baseboard top is fitted either covering the entire frame (solid top) or just where the tracks are to go (open top). ![]() This layout frame then has legs attached to it to lift it to an appropriate height. ![]() The normal method of baseboard construction involves building one or more frames with cross members at appropriate distances and attaching them together to form a complete frame for the layout.
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