Aluminum kit trailer idea

Hi,
Here's a discussion for The Lil Bertha{/i} aluminum trailer kit.
http://www.mikenchell.com/forums/viewtopic.php?p=855540#855540
I would like to make the build shorter than the 12' but use two more cross members in the frame and put the flooring in the resulting channels. It would be about 3 inches thick, so, if I used a foam and something sandwich, would that work?
The side rails and cross members are C channel 3X1 and 5/8 ish.
Something like this:
[ foam sandwich ][ foam sandwich ][ foam sandwich ]
I don't believe I can buy just one more cross member as they are listed in pairs. I would like ideas on where the axle would need to go. Still looking at either an 8 or 10 foot length for the cabin.
Thanks.
Here's a discussion for The Lil Bertha{/i} aluminum trailer kit.
http://www.mikenchell.com/forums/viewtopic.php?p=855540#855540
I would like to make the build shorter than the 12' but use two more cross members in the frame and put the flooring in the resulting channels. It would be about 3 inches thick, so, if I used a foam and something sandwich, would that work?
The side rails and cross members are C channel 3X1 and 5/8 ish.
Something like this:
[ foam sandwich ][ foam sandwich ][ foam sandwich ]
I don't believe I can buy just one more cross member as they are listed in pairs. I would like ideas on where the axle would need to go. Still looking at either an 8 or 10 foot length for the cabin.
Thanks.