Flatbed with no arch or curve

My company is currently looking for a flatbed to ship some large, light, and relatively fragile components. In the past we have requested a "flatbed" and received a bed with a slight curve which makes it unusable for our applications as the components are not heavy enough to flatten out the trailer and there is a good chance that the curve in the trailer will result in the components sagging and becoming deformed. I am wondering if there is some way we can specify that the trailer must be perfectly flat without any kind of curve on the bed? If you have any examples of trailer models that might satisfy this requirement that information would also be useful.

I've tried googling this stuff and can't seem to find what I'm looking for, thanks for any help.

EDIT: Our specific dimension requirements are a 48 foot (minimum) flatbed trailer with air suspension, every skid of the shipping crate must be supported by the bed of the truck, no shimming allowed. We've been able to ship these components in the past but its always trial and error until we get a flatbed that will work, I'm trying to find a way to clearly communicate to a shipping company to save their time and our money. Thanks for all the replies so far.

 

Our requirements as specified by our process instruction is a 48 foot (minimum) bed with air suspension. I'll add that information to the initial post to make sure that its understood. Sorry if my initial post wasn't specific enough I was just wondering if there was some specific way I could phrase the request to ensure that the "perfectly flat" requirement is appropriately understood, I'm pretty new to the shipping side of this stuff. Thanks for the reply.

 

That is what I would figure, however, when we say things like this we somehow get trucks that don't fit, we've already turned one down for this shipment and have another coming sometime today. All of my predecessors say this has been an issue almost every time we try to ship these components.

 

That's what seems to be the problem, the trailer we require is not a trailer that is particularly useful for shipping anything but our components so nobody has one.

Is it possible to load a dry van trailer from a crane (perhaps one with a removable roof)? the dry van trailer sounds perfect but my interpretation of our process instructions would indicate that forklifts can't be used, we typically use a carefully rigged crane to move them around quickly so they can't sag.