Tony,
I think the u-bolts go around the stiffener plate/chassis rivetted unit and up over the wooden bearers on top of the chassis, not around the body itself. That main wooden bearer has cutouts on the lower side to clear rivets and attachments to allow it to sit flush along the chassis rails.
Above the wooden main bearer you can see further cutouts in the actual body frame to go over the u-bolts. The model of the blitz tipper shows the set-up. The chassis has a bearer on top permanantly attached with u-bolts and the body, with its own longitudinal structure, rests on that when down.
Lang
|