Measuring arrangement to determine location of corners for a building foundation and a wooden base frame, and the use thereof
View Patent ↗An arrangement comprising a laser projection device is used in determining the location of corners in constructing a foundation of a building or other structure. The arrangement is also used in positioning wooden beams perpendicular to one another in a floor frame or similar structure.
1. A method of defining a 90 degree angle for positioning the corner of a building foundation, using a measurement and positioning device for defining a 90 degree angle for positioning the corner of a building foundation, said measurement and positioning device comprising: a hook structure being configured to hang said device from a string tied between two stakes; and at least one laser beam projector being configured to project a laser beam from said measurement and positioning device substantially perpendicular to a string from which said measurement and positioning device is suspended to define a 90 degree angle and a location where a corner of a building foundation will be placed; said method comprising the steps of:
placing a first stake and a second stake in the ground on a line where a side of a building foundation will be located;
tying a string between said first stake and said second stake;
hanging said measurement and positioning device from said string; and
switching on said measurement and positioning device to supply power to said at least one laser beam projector to project a laser beam from said measurement and positioning device substantially perpendicular to said string to define a 90 degree angle and a location where a corner of a building foundation will be placed.
2. The method according to claim 1 , wherein:
said at least one laser beam projector comprises two laser beam projectors configured to project two laser beams away from each other in opposite directions; and
said step of switching on said measurement and positioning device comprises switching on said measurement and positioning device to supply power to said two laser beam projectors to project a laser beam from said measurement and positioning device substantially perpendicular to said string to define a 90 degree angle and a location where a corner of a building foundation will be placed.
3. The method according to claim 2 , wherein said method further comprises the steps of:
placing a third stake in the ground and in alignment with one of said two laser beams;
placing a fourth stake in the ground and in alignment with the other of said two laser beams; and
tying another string between said third stake and said fourth stake and in alignment with both of said two laser beams and perpendicular to said string between said first stake and said second stake to define a 90 degree angle and a location where a corner of a building foundation will be placed.