I have created a model of what the part should be like, but I am having trouble creating the sheet metal parts that make this up.

I have tried a couple of methods, the attached file is using a sweep of a 3D sketch.

This part due to its size will probably need to be made up of several pieces.

Its converting this solid into sheet metal that I can't do. I imagine the side rails will be separate sheets as well.

I may be going about this all wrong...I have attached the Model as well for those who may want to check it out

Any help would be appreciated.

Thanks