Masonry Magazine August 2004 Page. 33
To shoot perpendicular from an existing wall, bump one edge against the wall and the other beam is exactly 90 degrees from the wall. Measure out the desired distance, mark your spot, and snap your lines. Lasers mounted in and on standard and torpedo levels are becoming common as the prices drop to levels equal to standard bubble levels.
Kennison
Lasers mounted in and on standard and torpedo levels are becoming common as the prices drop to levels - pun intended - equal to standard bubble levels. While doing an Internet search, we found Northern Industrial Tools laser levels for as little as $25, and other brands are comparably priced. Typical of the low-end laser level, the Northern 36-inch unit features two vials for horizontal and vertical measurement from minus 90 to plus 90 degrees. The level projects a laser dot, horizontal line, vertical line and laser cross pattern with a working distance of 150 feet in daylight or 300 feet in low-light conditions. This level is made of aluminum, as are most laser/bubble levels.
An aluminum torpedo level with laser functions by RoboToolz, sold through Porter-Cable and other distributors, is called the Robosquare. The three beams provide simultaneous level, plumb and square reference points with all beams starting from the same light source. It has a magnetic base, can be tripod-mounted, and has through holes for attaching it to various surfaces such as studs, beams and pipes.
Whether the laser/bubble levels are ready for the stress and strain, not to mention dirt and mortar, found on mason jobs is still to be proven. Each generation has been sturdier and more resistant to the harsh construction environment. But electronics never have liked what is normal on a construction site, so we'll withhold judgment until more experience is gained. It might be a good idea, even with the best laser levels, to have a backup standard level, some good mason's line and a plumb bob or two handy.
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