Fixture assisstance

Hi All,

please see attached screenshot of skid in query.

I have a skid im trying to simulate with 2 loads of 8T and 12T evenly over the four points to see if it would pass a load test.

I currently just have it fixed on the under side of the bottom rails. I was just wondering if any1 could suggest a better method of restraining them model as i dont get any results through the bottom rails as its fixed.(if im right in sayin tht, please correct me if not)

The skid doesnt get bolted down or anything, just sits on the surface then the load is applied to the 4 points evenly.

If i add a virtual wall to the underside of the skid, would this be an efficent enough restraint.

Thanks for any assisstance

SolidworksSimulation