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Construction Rosenbahn Overpass

13 oktober 2013

Building description of the Rosenbahn Overpass:

During the construction of the upper part of the track, suddenly the idea came of making ​​a train overpass according to a Swiss example.

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Prompted by this vacation example, in Switzerland it is created. See the complete description with pictures how this is been made in scale 1:87.

First, the location is determined on the track. Then cut the hole in the top plate of the track and everything is ready to record the shape and size of the to be build crossover. The base of the overpass is made of plywood. The arches are cut out at the bottom is sealed with small wooden slats. Over the arch is plastic wire mesh glued using wood glue. This is the basis for the plaster to stick on the wooden frame. The so-called skeleton of the viaduct seen from the inside of the curve, this is what will be later the visible part. In order to work easy and properly, the skeleton structure clamped between two boards, on both the upper side and on the underside. On the wooden skeleton first became a layer of wood glue to ensure a proper adhesion of the plaster to the wood. Now a layer of about 5mm plaster is applied. Let the plaster semi cure (should not be completely dry) and then make everything smooth with a damp brush. After complete drying and curing the profile of the stones can be scratched into the plaster.  This is done with a small screwdriver and a knife. Sometimes there are broken stone pieces cut out from the top layer to give the overpass a weathered look. The first paint layer can be applied. This is done with acrylic paint (water based) which must be strong diluted to ensure it penetrate well in the deeper parts such as the joints. Before the next layer will be applied there must be no visible white plaster in the joints and deeper parts anymore when the first layer is dry.  After the first coat is the viaduct can be fit in its final place on the rail track. The rest of the paint job will be done with the viaduct in its final location. This is mainly to get no damage on the paint during installation so that the last layer should be refurbished. The connections of the rock walls will be made now. We use fine metal mesh netting, because we can shape this easily . It is put fixed with a staple gun to the lower plate and top plate. Over the mesh, a layer of paper is applied, affixed again with the help of wood glue. This will prevent the plaster goes through the meshes of the mesh. The rough shape of the rock wall is now visible. Further formation of the wall can now be made ​​with the plaster. After curing of the applied layer of plaster on the mesh the plaster can be formed into rocks by using a screwdriver and chisel. Next step is to color the rock. First again with diluted black acrylic paint washed in and then there is chosen a shade of gray. Also the overpass will will be immediately treaded further with the same colors. Finally there is white accents applied with the Dry-brush method. This brings even more depth in the whole and especially accentuated the higher lying parts. Trees are being placed, rock boulders deposited and green material under fitted into the abyss. More and more it becomes a complete natural scene. Also at the top and background details are provided to look like a mountainside. The first locomotive has also appeared on the viaduct.

Viaduct locatie RosenbahnBasis viaduct Rosenbahn overzichtBasis viaduct RosenbahnViaduct Rosenbahn met gipslaagViaduct Rosenbahn profiel inkrassenViaduct Rosenbahn eerste verflaagViaduct Rosenbahn passend op de baanViaduct Rosenbahn aansluiting makenViaduct Rosenbahn aansluitingen afdekkenRotswand bij Rosenbahn viaductRosenbahn viaduct afgrondViaduct Rosenbahn met begroeiing

Rosenbahn Viaduct with Swiss loc Re4/4

Rosenbahn Viaduct with Swiss loc Re4/4

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