Building

Square Layouts
Unlike time consuming and inaccurate 3-4-5 methods, one person can square up to 150′ indoors, 70-80′ outdoors and even more with a target.

Both beams intersect at the inside corner of the framing square, so if your used to the “Nail and string thing”, simply push the inside corner of the square up to the nail and your squaring from that nail.
To shoot perpendicular from an existing wall, bump one edge against the wall and the other beam is exactly 90° from the wall, measure out the desired distance, mark your spot, and snap your lines. See the SL-24 for removing the need of chalk lines entirely.

Targeting
Use any piece of wood with a vertical line on it to transfer the dot to the floor. From an existing snap line shoot square away from the line by keeping the inside corner and the other dot lined up with your snapped chalk line.

Accuracy
The FR-16 is user-calibrated. Simply put, 90° and 90° should equal 180° (a straight line). When the laser is turned 90° its total should match the snapped chalk line. If it doesn’t match, simply adjust the appropriate screws until it does (all units are pre-calibrated before shipped).