len19070 wrote:You definitely will need something to triangulate/stabilize it.
I've done it but I incorporated some BIG metal wall angles at the Hatch hinge cross member and the side.

I used the flat ones so I could hide them under the wood.
Len
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rowerwet wrote:if you only need to load long narrow stuff through the hatch (shutters) how about a galley wall in the normal location and shape but build only 6" of it from each side of the trailer, make the 3' of the foot wall, counter top, and back splash wall removeable. That way you will have a normal galley for camping and a nearly open back for hauling stuff.
The remaining 6" of wall and counter properly framed in place would give the sides all the strength needed
Both have good solutions; may I suggest some specifics? The key is to keep the angle of the walls to roof/floor at 90 degree angles to each other. The most used method is a standing bulkhead, as most trailers have, and another is angle braces. Due to the weight of the wood, and wind forces involved, the brace must be strong enough to resist flexing or collapsing, so a gusset is a way to strengthen the brace (or bracket). I used gusseted angle braces to supplement my main bulkhead, top and bottom, and side to side.

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I used this Simpson Strongtie piece:

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http://www.homedepot.com/p/t/100375243?langId=-1&storeId=10051&catalogId=10053&N=5yc1vZ615Z615&R=100375243# Although it works in conjunction with the bulkhead, a larger version would be needed as a stand-alone. If you don't need the entire 4x4 cross-section completely clear of supporting wall structure, then fabricate triangulating wood pieces in a "cut-away" bulkhead form. Another type of brace could also do this, as a bolt/screw-on support, a shelf support (meant to carry substantial weight, with triangulation included), like this:

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http://www.lowes.com/pd_48988-46882-25223PHLLG_0__?productId=3034237&Ntt=heavy+duty+shelf+bracket&pl=1¤tURL=%2Fpl__0__s%3FNtt%3Dheavy%2Bduty%2Bshelf%2Bbracket&facetInfo=