Hand sawing is cutting of concrete or brick with a hand held power cutter. This process also produces a smooth dustless cut.  Hand sawing can cut up to 200mm deep.  The cutting depth can double to 400mm in walls if access is available on both sides.  The saw is commonly used for cutting square openings thru walls and floors for doorways, windows and ducting.  It is also a useful tool for cutting through pre-cast panels.