Well after a long sabbatical, I am back with the start to finish of the construction of the Merriwa Silo in HO, So lets begin. I have been building silos for a few years now and have developed methods that have proved to be reasonably successful. I always start with a solid base, as with any building a solid base or foundation is always a good place to start.
The Merriwa S052 Grain Silo is an impressive structure with a height of over 140 feet (490 mm), it needs to be built on a base that also doubles as a base for it's own storage and transport box.
1. So I start with the base of the silo, measuring 745 mm long x 240 mm wide on 9 mm craft wood this is secured to a 12 mm sub-base, using 10 T- nuts. The box actually fits on the outside of the 12 mm base and is secured with screws through the sides. Seal the craft wood with a clear lacquer to stop any chance of moisture infiltration.
|Silo Base with 10 T nuts and sub base made from 9 mm and 12 mm Craft wood.|
|The 1.5 mm acrylic base is glued to the 9 mm craft wood using Selleys Gel Grip adhesive. The small holes at the rear, assist in locating the wagon shed foundations.|
3. More 1.5 mm Acrylic pieced are placed onto this piece to build up the base. All the acrylic can be glued using superglue or Di-chloride Methane (use with caution, as it can be dangerous if inhaled). The piece below has holes in it to allow the location of the wagon shed foundations, a centre partition to separate the 2 wagon shed grates and holes for the drainage system. The drainage system in these silos is very important as the lower conveyor and electrical equipment needs to remain dry at all times, and the drains are critical in diverting water away from the silo base.
|More acrylic is added to build up the base of the silo.|
|The small sections of acrylic are bases for the drainage run off., note the small slots between the bins, that locate the elevator, tower.|
|Silo base starting to take shape|
5. The foundations for the wagon shed frame are next, these were designed so that they accept Special Shapes I and H beams. The outer frames will accept B-3-1x (3/32" x 3/64") beams, whilst the inner frame is made from S-2x (5/64" square brass). The middle partition id simple that a separator or partition for the 2 discharge grates.
|The foundations are glued into the laser cut holes in the acrylic parts.|
|A close up view of the footings with holes in them to accept the I beam and square brass uprights.|
|Brass grates added to the model.|
|Parts for the drains made from Strong and Flexible plastic at Shapeways in the Netherlands|
|The drainage system in place on the silo base.|
|Close up of the drainage parts, note the tabs on the p[arts which fit into the holes in the base. The "H" pattern in the drainage parts, allows for the out loading platform supports to fit into place.|
|Elevator tower located onto the base.|
|Elevator tower top, the sloped cut outs on each side are to accommodate the bin roof sections, while vents fit into the front and rear holes with doors and discharge chutes on the sides|