Trans BC Freightways has 48 foot trailers in this design, the top of the trailer is solid, and some even have a regular door on the rear. It is the sides of this trailer that make the difference. Each wall is actually a tarp material that can creates a curtain that can be securely fastened to the frame of the deck, creating a load bearing wall.
These trailers can be loaded or unloaded easily from the sides, as only one curtain at a time can be unfastened if needed. If a driver is making multiple short trips in one day, both curtains can fastened open. As no support posts are required, any loading can be done in a timely fashion.
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