Patent ID: 8922758
Filing Date: 2014-12-30
Classification: G01C

Abstract:
1. A method of establishing the location of a pair construction points for a stud in a building interior at a construction site and for determining the length of the stud needed to extend between said pair of construction points, where the points are defined by x and y coordinates, comprising the steps of: generating a beam of laser light, directing the beam of laser light toward a first of the construction points, determining the distance from the source of the laser light to a point on the actual building surface which is illuminated by the beam, and if the distance from the source of the laser light to the point on the actual building surface is greater or less than anticipated, determining an updated construction point, directing the beam at the updated construction point, and determining the distance to the illuminated point on the actual building surface until the distance from the source of the laser light to the point on the actual building structure is substantially equal to that anticipated, whereby a first point on the actual building surface having said x and y coordinates is established, directing the beam of laser light toward the second of the construction points, determining the distance from the source of the laser light to a point on the actual building surface which is illuminated by the beam, if the distance from the source of the laser light to the point on the actual building surface is greater or less than anticipated, determining an updated construction point, directing the beam at the updated construction point, and determining the distance to the illuminated point on the actual building surface until the distance from the source of the laser light to the point on the actual building structure is substantially equal to that anticipated, whereby a second point on the actual building surface having said x and y coordinates is established, and determining the vertical distance between the first and second points, whereby the difference in the z coordinates defines the length of the stud needed to extend between said selected pair of construction points.