Belt Conveyors are used to move bulk materials such as sand, gravel, coal, rock, etc from one point to another, in some cases over very long distances from mine pits to processing locations. After the material has been processed, its either loaded into trucks or rail cars or stockpiled in large piles. Bulk material storage piles will often times have reclaim tunnels running under them where material can flow into the tunnels and be loaded via another belt conveyor for transport. When multiple stockpiles are needed, a Tripper Car Conveyor will be used, and over the span of one single conveyor there may be multiple stockpiles to achieve maximum storage without the need for multiple conveyors. Tripper Cars run the length of the conveyor on rails and can offload material from the belt conveyor into multiple different stockpiles. When combining belt conveyors, tripper car conveyors, transfer towers, and conveyor supports, you can easily add multiple stock piles to your processing centers on your layout.
Model of a Belt Conveyor Feeder Head 39" belt width and catwalk on one side. Use this model when building a Tripper Car Conveyor model. Model will slide into the second platform deck on my Transfer Tower model and catwalk will line up with platform.
Expand by adding multiple models to make a longer conveyor. Add 60' Belt Conveyor sections w/Tripper Car Rails, Tripper Car End Sections, and Tripper Car model to complete the tripper car belt conveyor.
You will also need to add the belt (using fine sandpaper or black electrical tape) and a see through grate deck material to complete the catwalk deck.
For the deck, I suggest using Plano Models Apex Slotted Pattern Material available here:
http://www.planomodelproducts.com/scratch_scq.html
For the Railings, I would suggest using Mike Rose brass pipe railings available here:
http://www.mrhobby.com/store.php/MikeRoseHobbies/pg6896/etched_brass_