Style of rampart construction common amongst the late Bronze Age and early Iron Age hillforts of central and northern Europe. Two parallel lines of well‐spaced paired upright timbers were joined together top and bottom, and linked longitudinally to create a wooden framework or series of boxes. These were then filled with rubble and soil to give strength and mass. The front face was vertical and either completely clad in timber or, where materials allowed, faced with dry‐stone walling between the timber uprights. The rear face was sometimes ramped with soil, but mainly left vertical too. The top is never preserved archaeologically, but it is assumed that the front face was higher than the rear to create a breastwork and walkway along the top of the defences.