Cut and lay the main chassis packers at 400mm centres along the inner top chassis runners from the front of the trailer. Tack weld in position.
Fit and clamp the sub chassis runners to the main packers and tack weld in position.
Repeat with the front chassis packers and front sub chassis cross member keeping all parts flush with the front of the trailer.
Trim the rear angle braces to fit between the sub chassis runners and the light channel and tack weld into position.
There is still a bit of work yet before we start welding up the chassis. The next section covers fitting the suspension.