M116A2 help

[dirtyfingernails]

Secured a top for my trailer (thanks Mark!). Put it on and it sags in the middle like some support is missing. When I got the trailer from GL, it only had four metal bows. Is there something else for the middle area? A pic would be VERY helpful. I'll probably have to fab something up. Thanks.
Steve

 

[papercu]

You can place some 1x lengthwise on the top. You'll need carriage bolts to hold them in place and sand down any sharp corners. Wayne