House raising
House raising (house lifting, house jacking, barn jacking, building jacking) is the process of separating a building from its foundation and temporarily raising it with hydraulic screw jacks. The process is the first step in structure relocation in which the building is moved to a different location. House raising may also be a part of a renovation to build a foundation under an existing house or make a house larger by building a new floor level creating a two story house. Often employed in areas that are prone to flooding and storm damage, this process can be achieved through the use of either timber piles or helical piles. Once a house is raised and supported on cribbing, a new foundation can be constructed beneath it. After Hurricane Katrina and Hurricane Sandy large numbers of houses in parts of Louisiana, New York and New Jersey were raised to avoid future flooding.
House-built engine
Such construction was also quicker to build on-site, as a pre-manufactured engine could be supplied by the engine maker in almost completed form. Skilled engine erectors were a rare resource, especially in remote mining areas, and the need to have them working on-site for long periods whilst a large house was constructed around the engine was often a cause of delays to an engine being completed. Even with adequate labour, masonry construction is a slower process than delivery of machinery alone. Where brick foundations were constructed, it was recommended that at least fifteen days were allowed before the weight of the engine was placed onto them.