Abstract: The disclosure provides an article of manufacture that includes a rectangular horizontal member, a vertical member bisecting a length of the horizontal member and forming a T-junction at the horizontal member, first and second sloped members spanning from a top of the vertical member to opposing ends of the horizontal member, and first and second support members spanning from the T-junction between the vertical member and horizontal member to work points on an underside of each of the first and second sloped members. The article of manufacture can be assembled on the ground at a construction site from prefabricated units shipped together in parallel planar orientation in a shipping container to provide a truss unit for forming the roof of a structure.

Abstract: The disclosure provides a method that includes providing or assembling a rectangular horizontal member, joining a vertical member to the rectangular horizontal member such that the vertical member bisects a length of the horizontal member and forms a T-junction at the horizontal member, joining first and second sloped members to the rectangular horizontal member and vertical member such that the first and second sloped members span from a top of the vertical member to opposing ends of the horizontal member, and joining first and second support members such that the first and second support members span from the T-junction between the vertical member and horizontal member to work points on an underside of each of the first and second sloped members. The structure thus formed can be assembled from prefabricated units shipped together in parallel planar orientation in a shipping container to provide a roof truss unit.

Abstract: This invention provides an acoustic imaging device which utilizes scattered acoustic wave information to produce an image. The system consists of an array of acoustic transducers which at least partially encircle a medium to be imaged. The medium is sequentially insonified by each transducer with an acoustic signal comprised of at least one discrete frequency. The acoustic signal scatters from the medium and is detected by the remaining transducers. A data set representing the phase and amplitude of each discrete frequency at each transducer is acquired and used by a computer to calculate an image of the medium. Images acquired and calculated at each identifiable discrete frequency are combined in various ways in order to improve the quality of the final image of the medium.