Extremely heavily built with nesting design, (front feet of top flatbed nest in front steel cargo boxes) front of roll off has feet and rear has wide rollers.
There is a solid steel tiedown bar that runs through the center to secure each sides cargo independently.
These have been extremely useful for me hauling heavy equipment, Lumber and other heavy job site materials without needing people or equipment to unload onsite immediately.
Each flatbed also has 10 strap winches on each side, Each flatbed also has fork pockets that can be accessed from either side to stack decks or set them on non-rolloff trucks.
Front steel cargo bins allow storage of chains, binders, fuel tanks and other support equipment.
These fit a standard 30” chain style roll off truck (such as Lane Forest Products here Eugene,) and many other companies witch allows you to move your supplies and equipment without needing your own trucks or needing to worry about tie-down or loading/unloading at each end.
These have been a great asset for our construction company, but we are downsizing and no longer have a need for them.