Masonry Magazine January 2003 Page. 32
Levels in
THE FIELD
Laser Levels
LASER LEVELS have been around for a while, but they are now becoming financially attainable to masons and other workers. Although more expensive than most wooden and metal levels, laser levels offer one advantage that these other types cannot even begin to achieve: measurements of long lengths, from 50 or 100 feet, up to a diameter range of 2,500 feet. For example, masons can set up a laser level and have a level, line and plumb reference for a long length of retaining wall.
"Lasers are very easy to use in establishing vertical or horizontal lines," says Hammond. "Prices have really become very competitive in the past few years. Features and functions have become more advanced, yet easier to use. Lasers are used for control lines, setting courses and measuring or laying out any openings. They do anything a standard level can do, only over longer distances."
"There are many types of laser levels that masonry professionals could choose from depending on the size of their project," says Lawrence Smith, Division Segment Manager of Trimble, Sunnyvale, Calif. "Portable handheld lasers that offer plumb up, plumb down, level and square capabilities would be very useful in saving time and money for a contractor doing a small residential or remodeling job.
"If a contractor is building a larger, multi-story building the use of a horizontal/vertical laser would be more appropriate.
The Spectra Precision Laser HBO and VB02 ftare high precision horizontal and vertical rotating lasers ideal for a variety of general construction and interior applications. The numerous high-end features including seeing remote control siting plumbup beam and PlaneLok, make them capo ble of meeting virtually any short or long-range leveling alignment or positioning requirements.
The key advantage of lasers is that they make it easier for the mason and save time; faster set-up, less re-work due to inaccuracies, and time savings on the job site equates to a cost savings for the contractor."
Much like the other types, durability and ease of use should be considered when purchasing a laser level. Also, if you are going to invest the money, a self-leveling laser is advised.
"Most contractors prefer self-leveling as vials have a tendency to lose accuracy in certain weather conditions and bubble vials can be inaccurate," says Smith.
Some other features that masons can choose from include: dual laser diodes for increased beam visibility; wall, floor and/or tripod mounts, brackets or clamps; bump sensors to alert the user if the laser has been moved after leveling; laser and bubble vial hybrid combinations, and optional receivers that will increase the laser's operating range. Masons using laser levels should also purchase laser enhancement goggles to aid in seeing the projected lines. There is also a laser level that is specifically made to be used in exterior applications and easier to see in sunlight.
Laser levels are relatively maintenance-free and a few offer the ability to "self-check." These levels, like others, should be cleaned off after use and stored in a safe, dry place. Most lasers include a hard, carrying case. It is recommended that once a year the level should be cleaned, checked and adjusted by a professional.
"Heat, cold and moisture could possibly impact a laser and optical level," adds Smith. "The degree to which these elements impact the products stability, accuracy and general performance will be dependent on the quality of the instrument itself. Higher quality instruments are typically designed with the job site condition in mind. The Spectra Precision Laser LP4 and HV601, for example, are designed and tested to endure shock, moisture and temperature changes while not impacting the overall performance of the instrument."
"All lasers have a difficult time operating at 110 degrees or higher," says Hammond. "They have a diode technology that reflects the sunlight back into the laser, causing very high internal temperatures. To combat this problem, use a damp cloth or an umbrella in extreme heat."
Laser levels can range in price from $80-$2,000, depending on the product and options.