This is an OpenScad 3D model of a Beaglebone Black for use in case design. The clearance volumes are provided so that this object can be geometrically subtracted from a case model to generate the necessary openings for I/O ports. The board length and width, corner radii, and hole positions were taken from the BBB A5A system reference manual, and the remaining dimensions were measured on a model A5A board. See http://www.thingiverse.com/thing:102399 as an example of a case that uses this thing to create correctly positioned openings.