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Excerpt From:  THE WORKING TOOLS OF THE CRAFT, CHAPTER V, MASONIC ESSAYS (1998), W.M. DON FALCONER, THE CRAFT The three types of square used by operative masons were the square gauge, the trysquare and the gallows square. The square gauge is an enclosed square of the required inside dimensions...

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This article will help you select a rotary laser level for outdoor use. Rotary lasers levels project a beam of light 360° allowing the user to establish a horizontal or vertical plane. Models Recommended for Outdoor Use Only 40-6580 Electronic Self-Leveling Dual Grade Horizontal Rotary Laser L...

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This article will help you select a rotary laser level for indoor use. Rotary lasers levels project a beam of light 360° allowing the user to establish a horizontal or vertical plane. Models Recommended for Outdoor Use Only 40-6545 Electronic Self-Leveling Rotary Laser Level with GreenBrite&re...

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This article will help you select a rotary laser level for both outdoor and indoor use. Rotary lasers levels project a beam of light 360° allowing the user to establish a horizontal or vertical plane. Models Recommended for Outdoor and Indoor Use 40-6522 Electronic Self-Leveling Rotary Laser L...

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This article will help you choose a dot laser level. Dot lasers levels, also known as plumb laser levels, project laser dots either vertically, horizontally or at right angles allowing the user to establish plumb lines or right angles. Models Recommended for Outdoor and Indoor Use 40-6680 Self-Lev...

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This article will help you select a line laser level. Line Lasers project lines either vertical, horizontal or vertically and horizontally simultaneously.  All line laser levels are self-leveling and higher quality line laser levels will have a locking compensator, so the inner workings of the ...

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This article will help you select a line laser level for either outdoor or indoor use. Line Lasers project lines either vertical, horizontal or vertically and horizontally simultaneously. Models Recommended for Outdoor and Indoor Use 40-6662 Quad-Line® Self-Leveling Cross Line Generator with P...

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This article will help you better understand laser distance measuring. For jobs where you could use a tape measure, a laser distance measurer can be faster and just as accurate. Press a button to read and record all measurements accurate + 1/6" up to 165 ft. Models Recommended for Indoor Use 40-60...

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This article will help you choose an optical instrument, commonly referred to as a transit level, builder's levels and automatic levels. Transits are used to establish grades & elevations as well as establish straight lines. Models Recommended 40-6926 26X Automatic Level (#1 features: maximum ...

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This article will help you choose between digital and electronic levels. Some digital levels resemble traditional box beam levels, except they include an inclinometer and LCD display. While other digital levels include angle finders and lasers to extend the line or angle. Models Recommended 40-602...

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Choosing the laser levels for your project can be easy if you answer the following questions. Question 1: What kind of work is the laser level going to be used for? Make sure to have a clear definition in mind. Are you building decks or house foundations? Is the work indoors, outdoors, or may...

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Today, the three most common types of laser levels are Rotary Laser Levels, Laser Line Levels (or Line Generators) and Dot Laser Levels (or Multi-Point Lasers) This article focuses on the technical specifications of Laser Line Levels. Laser Line Level Line Laser Levels project a beam of light typ...

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Today, the three most common types of laser levels are Rotary Laser Levels, Line Laser Levels (or Line Generators) and Dot Laser Levels (or Multi-Point Lasers). This article focuses on Line Laser Levels and practical applications of use indoors and outdoors. Interior Applications An easy example t...

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Today, the three most common types of laser levels are Rotary Laser Levels, Line Laser Levels (or Line Generators) and Dot Laser Levels (or Multi-Point Lasers). This article focuses on the technical specifications of Dot Laser Levels. Dot Laser Level Output Dot Laser Levels project two, three or f...

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Today, the three most common types of laser levels are Rotary Laser Levels, Line Laser Levels (or Line Generators) and Dot Laser Levels (or Plumb or Multi-Point Laser Levels). This article focuses on Dot Laser Levels, indoor and outdoor leveling applications on the construction job site or in the ho...

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Wood Level Overview The wood level has been around for over 100 years. Over the last 15 years in the U.S. however, there are fewer wood levels sold as professionals begin replacing wood levels with box beam levels. Wood levels can be made either of a solid piece of wood, like birch or mahogany, or...

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Speed the job of rafter or angle layout by using our Rafter Angle Square. With one number on our square you can frame a roof or a solar panel support, or layout stairs, cabinets, trim work, or many other construction projects. Johnson's Rafter Angle Square has a handy 6" rule for quick measurements...

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A sliding T-bevel is an instrument that is used for both laying out and transferring angles. These tools are pivotal for many different kinds of construction jobs, especially for those in which the ideal 90° angles are not possible. With the sliding T-bevel, one is able to conform his/her projec...

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Typically, I-beam levels have vials that are snapped into the frame. If the this type of level vial needs replacing, it can be done easily and with the same accuracy as when the level was new by simply removing the old vial and replacing it with a new one. For I-beam levels, this procedure will ge...

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Proper handling and storage are required to maintain the quality of wood levels. The following suggestions will help keep your wood level in top condition. KEEP YOUR WOOD LEVEL CLEAN Cement contains chemicals that can break down the layers of lacquer that were originally applied to the level. Be s...

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A combination square is a multi-use measuring instrument which is primarily used for ensuring the integrity of a 90° angle, measuring a 45° angle, determining level or plumb, measuring the center of a circular object, find depth, and simple distance measurements. The versatility of the combi...

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Today, the three most common types of laser levels are Rotary Laser Levels, Line Laser Levels (or Line Generators) and Dot Laser Levels (or Multi-Point Lasers). This article focuses on Rotary Laser Levels and practical applications of use indoors for rough and finished construction projects and outd...

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IMPORTANT: make sure that the working edges of the level and the surface you are using are completely free of any foreign material or debris. Testing Bubble Level Accuracy For Level Vials: Place the level on a flat horizontal surface Note the position of the bubble and mark the position of the ...

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Even though the beam coming out of a laser level has only a small amount of power, it is concentrated enough to harm your eyes. Anyone using a laser level should follow the below precautions: NEVER stare into a laser beam. If you are wearing tinted lenses to increase the laser beam’s inten...

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Q: Where can I get my Johnson laser level serviced when it is out of warranty?A: Please click the link for Service Centers under Support in the main menu for a complete list of Authorized Non-Warranty Repair Centers. Q: Does the Johnson Level & Tool limited warranty apply to items purchased on o...

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ACCURACY The tolerance of the laser beam at a certain distance from the tool (i.e. ± ¼" per 100'). This indicates how far the beam may deviate from 'perfect' measurement. APERTURE The location from which laser light is emitted from the laser tool. AUTO-LEVELING A method where...

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QuestionsQ1: What are the three most common laser level types?(a) Rotary Laser; (b) Line Laser; (c) Power Laser; (d) Dot Laser; (e) Cordless LaserQ2: True or FalseRotary laser levels project a beam of light 360° allowing the user to establish a horizontal or vertical plane?Q3: True or FalseRotar...

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ROTARY LASERS Electronic Self-Leveling 40-6580 (coming soon)40-6540/6545 (GreenBrite®) PDF40-6522 PDF40-6537 PDF40-6535 PDF40-6530 PDF40-6580 (Dual-Grade) PDF Self-Leveling 40-6543 (GreenBrite®) PDF40-6532/40-6...

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