Building a Tin lined feed storage box

OK, so we're all done with the project - and here's how it went... I'll try to upload some pictures later.

Background... The farmer had been storing chicken feed in blue plastic barrels in a stall in the barn that houses the chickens. They had a rat problem & had previously re-done the floors of all the stalls by excavating them & filling in with pea gravel and blue rubber mats, so we had a good base in the stall to work from. Our goal was to build a "built-in" box to store chicken feed that would be rodent proof. Initial plans were for a 12 foot long box to store feed in.

Approach... The farmer decided to make it easy & go for a 8 foot long box. This would allow for another 3 1/2 foot of storage space at the end of the box, rather than having the box take up the entire width of the stall (and having wasted space under the front beam where rodents could harbor). So... we went with a 4x8 sheet of 3/4 inch plywood, nailed to the back of the wall for the back. We then decided on a width just a bit more than the length of a feed bag for the bottom (42 inches). The left side was also nailed to the wall of the stall, and was 4 feet tall in the back, came out about 10 inches, and then tapered down to 3 feet tall in the front. This allows for a "ledge" at the back of the box and provides for a lean-back for the lids, when open.

With the back, floor, and left side in place, we started framing the inside with 2x4's and then put on a matching right side.

Here's where it got interesting - we lined the entire bottom and sides with aluminum sheets that were excess from a printing job at my wife's work(most were 2 1/2 feet by 3 feet) . We overlapped them & screwed them in & duct taped the seams. Yes, we boxed in the framing, which was a challenge, but this stuff was flexible enough to bend around the corners. Even though this stuff was fairly flimsy, we overlapped it enough to make it worth while. I'd say the thickness was roughly that of the cardboard at the back of a pad of paper.

Then, we framed in the front with 2x4's and put the front on, climbed back in and lined it with aluminum also.

Next, we put a center top beam between the front framing and the back, so we could install 2 hinged lids, with 4 hinges on each door.

As a final rat-proofing effort (and because the boyscout leaders insisted that we needed it), we lined the front and right outsides with very fine mesh (1/4 inch) chicken wire , using a staple gun to attach it.

So.. the farmer was very happy with the final result - the 3 foot front is easy enough to bend over to load & unload bags of feed, and between the chicken wire, 3/4 inch plywood, and aluminum lining, it should be rodent free.

I'll try to upload some pictures later.

Thanks again for everyone's advice & help on this - it feels great to have it behind us.
 
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This doesn't seem to be working - maybe someone can fix the post afterwards.


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Unfortunately, my attempt to upload the plans as a gif didn't work too well. Here's what's in my word document

Built-in Chicken Feed Box Planning
Tools Needed:

1. Square
2. Pencil
3. Tape Measure
4. Chop Saw / Skill Saw
5. Staple Gun & Staples
6. Level
7. Hammer & Nails
8. Drill & Screws
9. Brad Nailer & Brads
10. Air Compressor
11. Extension Cords
12. Eye Protection
13. Saw Horses
14. First Aid Kit
15. Gloves


Materials Needed:

1. 4 ½ Sheets of ¾ Plywood
2. 2x4s for framing (approx 10)
3. Hinges for lid
4. Aluminum Sheets
5. Chicken wire


Approach: To get the final dimensions of the chicken feed box, we enlisted the help of the farmer and project sponsor to ask his preferences, especially with respect to the length, width, and front height of the box. This information was critical in building a box that was as useful as possible (not too high to lift feed bags into).

Length and height of the back: We agreed to an 8’ by 4’ back, to maximize the use of donated materials and allow for additional useful storage space (3 ½ feet) to the right of the box. The top has a 10’’ offset before sloping to the front. This is to allow the lids to lean back when open.

Width of the box: We measured the length of a feed bag and added a couple of inches to make sure the bags didn’t become wedged in the box. This width was 42 inches.

Height of front of the box: We asked Mr. Bernstein his preferences for the height of the front of the box. We didn’t want it to be too high to comfortably lean over to load or unload bags of feed. We agreed on a 3 foot front height.

The process for assembling the box was as follows:
1. Install back, bottom, and left sides, using nail gun to attach to the wall of the stall.
2. Install 2x4 framing on the insides of the box.
3. Install the right side panel.
4. Line the entire inside with aluminum sheets, using screws to attach and duct tape to cover any exposed seams.
5. Install the front framing & install front panel, then line it with aluminum sheets, as in step 4.
6. Install the center brace and the 8x10 top panel.
7. Install the two top lids, using 4 hinges on each panel.
8. Line the entire front and right sides with ¼ inch chicken wire, attaching with staples.


Feed Box (rough) Specs - 4' tall in the back by 8' long, the sides come out 10'' from the back and then slope down to a 3' tall front.
the width is 42 inches (just a bit longer than his feed bags)

The framing is inside the box, using 2x4's. I really wish I'd taken the advice to line the boards with the aluminum before building it - it would have been much easier. As it was, we had to bend the aluminum sheets around the inside framing (which worked ok) and screw it to the plywood. We overlapped the sheets & put duct tape over any seams or sharp edges.
 

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