Abstract: Column cutting method and apparatus wherein an abrasive saw is mounted pivotally on a track encircling a concrete column. Pivotal movement of the abrasive saw sequentially cuts a circumferential kerf around the periphery of the column including reinforcing members by pivoting the saw substantially radially into the column. An uncut center is left for support, which center is easily fractured for removal of superfluous column segment.

Abstract: A tool stand comprising a series of end interfitting and fastening rectangular conduits. Each rectangular conduit has an axially disposed protruding block at one end thereof and an axially disposed recessed block at the opposite end thereto, the recessed block of one conduit being for engagement with the protruding block of a second conduit and with a threaded fastener being inserted in an axially disposed hole in the conduits to provide a fastening engagement of the conduits. Additional conduits are identically equipped for engagement in a sturdy conduit series.

Abstract: A self-propelled hydraulic power supply vehicle and tool mounting platform having an hydraulic fluid reservoir integral with and forming the structural frame of the vehicle, hydraulically actuated driving and steering apparatus for moving the vehicle across a support surface while performing a cutting operation on the support surface, and castor wheels facilitating vehicle mobility which are rotated into operative position raising the vehicle so that the wheels normally supporting the vehicle are raised out of contact with the surface for mobility when the device is not cutting the support surface.