Abstract: The method is for constructing parking structures, each parking structure having a site and being of the type including a plurality of parking decks, each deck being defined by a plurality of steel beams supporting a plurality of cementitious panels. The method is of the type wherein each panel is manufactured by pouring concrete into a form remote from the site. The improvement comprises: transporting a plurality of forms to premises proximal to the site; and constructing the panels.

Abstract: A bridge replacement method is disclosed. The bridge includes a deck supported by a pair of abutments, each abutment having wing walls. The deck is removed, footings are cast in holes dug behind each abutment and a pier is provided on each footing. Substantially parallel and coplanar cambered beams are provided. Each beam spans between and is supported by the piers. A brace assembly reinforces the beam camber. On each adjacent pair of beams, precast deck elements are placed, such that each element of said plurality spans the beam pair, to define at least transverse gaps between the elements and put the upper surfaces of the elements in compression in a transverse direction. The gaps are grouted. After grout curing, the brace is adjusted to reduce the beam camber and cause the upper surface of the elements to also be put into compression in a direction parallel to the beams.

Abstract: A bridge replacement method is disclosed. The bridge includes a deck supported by a pair of abutments, each abutment having wing walls. The deck is removed, footings are cast in holes dug behind each abutment and a pier is provided on each footing. Substantially parallel and coplanar cambered beams are provided. Each beam spans between and is supported by the piers. A brace assembly reinforces the beam camber. On each adjacent pair of beams, precast deck elements are placed, such that each element of said plurality spans the beam pair, to define at least transverse gaps between the elements and put the upper surfaces of the elements in compression in a transverse direction. The gaps are grouted. After grout curing, the brace is adjusted to reduce the beam camber and cause the upper surface of the elements to also be put into compression in a direction parallel to the beams.

Abstract: A bridge replacement method is disclosed. The bridge includes a deck supported by a pair of abutments, each abutment having wing walls. The deck is removed, footings are cast in holes dug behind each abutment and a pier is provided on each footing. Substantially parallel and coplanar cambered beams are provided. Each beam spans between and is supported by the piers. A brace assembly reinforces the beam camber. On each adjacent pair of beams, precast deck elements are placed, such that each element of said plurality spans the beam pair, to define at least transverse gaps between the elements and put the upper surfaces of the elements in compression in a transverse direction. The gaps are grouted. After grout curing, the brace is adjusted to reduce the beam camber and cause the upper surface of the elements to also be put into compression in a direction parallel to the beams.

Abstract: A bridge replacement method is disclosed. The bridge includes a deck supported by a pair of abutments, each abutment having wing walls. The deck is removed, footings are cast in holes dug behind each abutment and a pier is provided on each footing. Substantially parallel and coplanar cambered beams are provided. Each beam spans between and is supported by the piers. A brace assembly reinforces the beam camber. On each adjacent pair of beams, precast deck elements are placed, such that each element of said plurality spans the beam pair, to define at least transverse gaps between the elements and put the upper surfaces of the elements in compression in a transverse direction. The gaps are grouted. After grout curing, the brace is adjusted to reduce the beam camber and cause the upper surface of the elements to also be put into compression in a direction parallel to the beams.

Abstract: A micro-etcher that utilizes abrasive dust as the abrasive material, and which provides for effective dust suppression through the use of a gas-liquid aerosol spray. The tool consists of a means for the emission of an abrasive-laden stream of gas. A spray of gas-liquid aerosol is also emitted from the tool in a manner which effectively controls widespread contamination by the emitted abrasive material.

Abstract: Disclosed is a mixer comprising a receptacle, a support, a gas tube and a shaker. The receptacle defines a chamber including a lower portion for receiving a supply of particulate material and an upper portion contiguous with the lower portion. The receptacle has an inlet formed therethrough contiguous with the lower portion and an outlet formed therethrough contiguous with the upper portion. A support is provided, for supporting the receptacle for vibratory movement. A gas tube delivers a flow of gas to the inlet. A shaker is connected to the receptacle to effect said vibratory movement in a manner sufficiently vigorous to create a dispersion of said particulate material through which gas delivered to the inlet can diffuse to the outlet, at least a portion of said dispersion being fluidized so as to issue, with said gas, through the outlet as a flow of gas having particulate material entrained therewithin.

Abstract: A dental/medical handpiece having a flexible portion is disclosed. In one embodiment, the handpiece is an abrasion handpiece, for use with a flow of gas having abrasive material entrained therewithin, and comprises a housing including a handle, a nozzle-receiving portion and a flexible neck connecting the handle to the nozzle-receiving portion. A nozzle rigidly attached to the nozzle-receiving portion of the housing is also provided, as is a gas tube. The gas tube has a first end adapted to receive said flow, and extends, from said first end, through the handle, the neck portion and the nozzle-receiving portion, to the nozzle, to direct said flow to issue through the nozzle, outwardly from the housing. In another embodiment, the handpiece is a rotary tool, for use with a rotary bit, such as a dental drill. In a further embodiment, the handpiece is a laser handpiece, for use with a laser generator.

Abstract: An abrasion device is disclosed, which utilizes abrasive dust as abrasive material, and which provides for effective dust suppression through the use of a liquid-gas aerosol spray. The device consists of a means for the emission of a stream of the abrasive material. A spray of gas-liquid aerosol is also emitted from the device in a manner which effectively controls widespread contamination by the emitted abrasive material.

Abstract: A micro-etcher that utilizes abrasive dust as the abrasive material, and which provides for effective dust suppression through the use of a gas-liquid aerosol spray. The tool consists of a means for the emission of an abrasive-laden stream of gas. A spray of gas-liquid aerosol is also emitted from the tool in a manner which effectively controls widespread contamination by the emitted abrasive material.

Abstract: A dental abrading tool for use in micro-dentistry that utilizes abrasive dust as the abrasion material, and which provides for effective dust suppression through the use of a water-aerosol spray. The tool consists of a means for the emission of a stream of the abrasive material A spray of water-aerosol is also emitted from the tool in a manner which effectively controls widespread contamination by the emitted abrasive material.

Abstract: An abrasion device is disclosed, which utilizes abrasive dust as abrasive material, and which provides for effective dust suppression through the use of a liquid-gas aerosol spray. The device consists of a means for the emission of a stream of the abrasive material. A spray of gas-liquid aerosol is also emitted from the device in a manner which effectively controls widespread contamination by the emitted abrasive material.