On Feb 28, 2:18*pm, RoyJ wrote:
I have the full dimensions for the CJ frames, they have a LOT of bends,
brackets, and quirks to make a fabrication job pretty messy. There are
several companies that do these from 2x4" tube to replace the double
channel original. Under $2000. A quick google came up withhttp://www.throttledownkustoms.com/framesCJ7.htmlhttp://www.acmejeepparts.com/products/product_search.php?cn=Frames+%2...
The galvanized versions run around $800 more IIRC

You do not want to use aluminum: flex, fatigue, and strength all work
against you.



mark wrote:
My original jeep CJ-7 frame has rusted out and I was thinking of
building a new one from aluminum. Would 2 X 4 X 1/4 *wall (if that is
even available) box tubing have the equivalent strength of the stock
1/8" wall steel frame? I would like aluminum because it will last
forever, no need of any paints etc..., very easy to work with and
cheaper than building a steel one and having it galvanized. My second
choice would be stainless 1/8" box tubing.- Hide quoted text -

- Show quoted text -

Roy, as for the bends, I am going to eliminate the arches for the leaf
springs, I have a 4" suspension lift so straight frame rails will be
fine although I will have to bring them in narrower at the front.
Around here we use 4X4 1/4 aluminum box tube to build cranes for
aquaculture boats that are constantly lifting 1500+ lbs 8'-10' out
from the hydraulic lift cylinder and I see many aluminum boat trailers
made form I beam, box tubing should be stronger. Also i have a
fiberglass body which is much lighter. Each frame rail will have the
load spread out to 4 points due to the leaf springs. Maybe if I use 4
X 4 instead, a 20' length is only ~$200.00