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Track bed types.

The classical elevated railway track bed is made from wood. How you do this is more down to geography than choice. The wooden beds made by classical methods are two longitudinal runners crossed over with slats. A modern method is to use a flat plank over the runners. There are recycled plastic sheets available in structural thickness, e.g. Filcris "EHB" (Eco-hoarding-board), and this does have the advantage of being totally rot proof. It can be used with Filcris's own "ladder" system but you need to be aware of the high co-efficient of expansion and possible distortion of black plastic posts when exposed to extreme heat in sustained sunlight. There has been one builder using steel posts and runners with a type of external MDF ("Medite Tricoya") that claims a life expectancy of 60 years. The standard method is to cover the top of the bed with roofing felt. Be sure to buy the 25-year rated type. It can be nailed or glued to the top. But it is not very flexible and can crack if it is very cold when laying it..

The ground level trackbed is normally made from 4 parts pea gravel to 1 part cement. This gives a porous mix which is good for drainage. It is normally around 50mm thick, but if you are going to walk about on it then consider a thickness up to 75 mm with a bit of reinforcement such as "Weldmesh". Trowel into the groove you have dug and leave for about a week to cure. Fixing the track is normally done with "penetrator" screws, or mastic gun adhesives such as "No Nails", and then the track has a layer of false ballast. The ballast may be anything suitable. GRS recommend using fish tank gravel, Cliff Barker sells ground Cornish granite grit.

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Page last modified on January 08, 2020, at 07:17 AM