Patent ID: 7487595
Filing Date: 2009-02-10
Classification: G01C,Y10S

Abstract:
1. A measurement and positioning arrangement for defining a 90 degree angle for positioning the corner of a building foundation, said arrangement comprising: a first stake being configured to be disposed in the ground; a second stake being configured to be disposed in the ground a distance from said first stake; a first string being configured to be tied between said first stake and said second stake; a laser device; said laser device consisting essentially of: a third stake being configured to be disposed in the ground a distance from said first stake and in the path of said laser beam projected from said laser device hanging from said first string; a fourth stake being configured to be disposed in the ground a distance from said third stake and in the path of said laser beam projected from said laser device hanging from said first string; and a second string being configured to be tied between said third stake and said fourth stake to intersect with said first string to define a 90 degree angle and a location where a corner of a building foundation will be placed.