What distinguishes it is the deliberate arrangement of its components: closely set lengths of roundwood, each up to twenty centimetres in diameter, running in a consistent north-east to south-west orientation, with finer brushwood packed along the flanks and wooden pegs driven in to hold the whole assembly in place.

The structure measures over six metres in exposed width and survives to a thickness of around thirty-five centimetres. That combination of roundwood, brushwood, and pegs is characteristic of early Irish wetland construction, where builders working at the edge of bogs or along marshy ground laid down timber platforms to create stable surfaces. Such platforms served a range of purposes, from providing access across waterlogged terrain to supporting activity at the margins of a lake or fen. The peatland itself has acted as a preserving medium, the anaerobic, acidic conditions slowing decay in a way that dry ground never could, leaving timber structures intact across centuries or even millennia. The precise date of the Derryoghil platform has not been established from the available evidence, but its construction technique places it within a long tradition of Irish wetland carpentry that stretches back into prehistory.