The Mack camel back suspension is one of the best for articulation. The links below are pictures of military trucks but even the highway trucks were this supple. I could reverse up inclines that had all the other trucks having to engage inter axle and cross locks. This is with axles with normal spacing. http://www.remlr.com/photos/pics12/Mack on Articulation Gauge.jpg http://www.remlr.com/photos/pics12/Mack Rear wheel.jpg
look at this bogie [ame]http://www.youtube.com/watch?v=kBUlzN7MO3s[/ame] scania serie 2 have 580mm of axle walk on bogie or if you more like degrees this is 32° between axles
i make calculation looks like it will be hard to reach even 14.44m of useful loading space or 36 pal even with 0.5% of length tolerance
i put those images to show where they working and where they loading/unloading in very narrow spots i think i would not take so long cab this create huge wheelbase even with 6.4m body you need at least 4.9m wheelbase
thoses are good problems are with those ones on curtainsider trailer so you need put both longitudinal and transverse beams