On June 6th around 2:45am the WBFD was dispatched to the 4600 block of Penn Avenue in Lower Heidelberg Township for a tractor trailer into a building. Crews arrived on scene and had a single tractor trailer into the building with the cab completely inside the building. With no driver on scene crews worked to access the cab and it was determine that no one was in the vehicle. After further investigation it was determined that the tractor trailer had rolled from a parked position about 1/4 mile west of the incident. Crews check for hazardous and stood by while the tow company removed the vehicle. Crews were on scene for approximately 3 hours.