The structural evidence consists of a mound of burnt clay and soil lying over three large beam-slots forming three sides of a rectangular structure. The fourth side consisted of the footings of a stone wall into which the timber beams had been tied. A doorway was located on the eastern side, facing onto the end of the bridge. The size of the beams suggest a building capable of standing at least two stories tall. The building had been burnt, and the artefact distribution would suggest that the roof, with probably lead flashing, had collapsed inwards, and subsequently the walls had collapsed to the south-east.

The alternative reconstructions shown here are rather over-elaborate from the perspective of the excavators, but can still act as placemarkers in the final model.