mikeschn wrote:okay, I found this... (yes, it's upside down!!!)

Looks good, though I think it could be improved:
- It would be better to run the tongue to the third cross-member, not the second as that would reduce the load on that cross-member (which might well be the place where the trailer would fail first).
- Bolting together two angles to make the cross-member where the tongue ends increases the strength of that cross-member nicely, but it might benefit from a few more bolts between the two - 4 are shown but 8 or 10 evenly spaced would be better.
- The connection to the tongue, at the front end of the diagonals is a bit weird, with the bolt going through at an angle. However it is correct to use a horizontal bolt here, and certainly not a vertical one (which would weaken the tongue a lot). It would be better to trim off the horizontal leg of the diagonals, bend the projecting bit of vertical leg fore-and-aft and then bolt that through the tongue.
Andrew