I have an existing shed with the interior dimensions being roughly 11'-3" x 8'-5". The entrance door is 4'-0" wide and centered on the 8'-5" wall. The interior is bare 2x4 studs on 16" center. The door opens out and swings to the left. My original idea was to have the coal bin the on the right as you walk in 2'-3" deep, 11'-3" long, and 4' high. This would hold about 2.5 tons of rice if my math is correct. The only problem would be filling it. Since I'll be going to the breaker myself and dumping the coal in my driveway and then wheel barrowing it over it to the shed, I envisioned it would be a pain.
Then I thought about making the bin at the rear of the shed. 8'-5" wide, 4'-0" deep, and 4'-0" (3.3 tons). If I built it this way and created a removable section of wall in the front/center of it, I could roll the wheelbarrow into it and dump. When it fills up a little, I make a little ramp and dump some more. It would get to a point where I wouldn't be able to dump the wheelbarrow anymore, so I would have to shovel it in or come up with another idea. I could make the bin 6" deeper and 6" taller and add more coal to it too (4.25 tons). I do need room for the lawn mower, snowblower and other essentials.
I would add plywood to the interior of the shed for the bin to strengthen the walls and also add a hinged lid that I could use as a shelf.
I know the tool rental place down the street rents "dirt conveyor's", so I was thinking about seeing if one of them would work.
Any tips or ideas?