At the back of the main barrack buildings are wide, protected walkways (the buildings had staircases but no internal corridors) with access to each room via the walkways and landings on the back of each building. The protected thoroughfare was designed to provide natural ventilation to the buildings to prevent damp – a very successful design feature. Above the buildings are various workshops and magazines. The magazines are interesting because they are built as buildings within buildings, to minimise damp and increase the flow of air around the munitions. The floors are nailed with bronze nails, to minimise sparks.