Drag Boxes are a speedy alternative to Trench Boxes, where speed of production is paramount.
A Drag Box is used in stable, self supporting soil conditions, and is lowered into a pre-dug trench. Then, with the aid of an excavator, it is dragged along via the front strut as pipe production moves along the trench.
In order to enable this, a Drag Box has a cutting edge on the front of the box rather than at the bottom.
Drag Boxes also tend to be used on green or brown field sites, where there are no services or obstructions.