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Glossary

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Concrete Masonry Unit
Concrete masonry units are a versatile, environmentally friendly building product that can be used for a wide variety of applications. With the combination of shapes and sizes available, they can be used as part of attractive exterior design and add interest to interior walls. Using concrete blocks on a project can contribute to it being designated as a “green” building.

The typical weight of a CMU is 145 lbs. per cubic foot or 65,770 grams. This equates to 389 grams per cubic inch. 

Sizes, Components, Configurations, Systems

CMU are modular. The most common size is a nominal 8-by-8-by-16- inches. Door and window openings are positioned to minimize the cutting of units. Walls that contain one vertical layer of units are called single wythe, and two layers are double wythe. It is most common to build single- or double-wythe walls. When a continuous vertical space separates wythes, the assembly is known as a cavity wall. Units are held together by mortar.

Reinforcement is placed into horizontal and vertical cavities as needed, with grout placed around it. This helps walls to carry loads and resist other forces acting on them.

Insulation may be added to the interior or exterior faces, between wythes, or inside special unit cavities. The benefit of keeping the insulation inside the wall is that the masonry faces are exceptionally durable. Other accessories may be needed to promote proper drainage, attach finishes, and otherwise complete the wall.
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HEPA
HEPA is a type of pleated mechanical air filter. It is an acronym for “high-efficiency particulate air [filter]” (as officially defined by the U.S. Dept. of Energy). This type of air filter can theoretically remove at least 99.97% of dust, pollen, mold, bacteria, and any airborne particles with a size of 0.3 microns (µm). The diameter specification of 0.3 microns responds to the worst case, the most penetrating particle size (MPPS). Particles that are larger or smaller are trapped with even higher efficiency—using the worst-case particle size results in the worst-case efficiency rating (i.e., 99.97% or better for all particle sizes).

All air cleaners require periodic cleaning and filter replacement to function correctly. Follow manufacturer’s recommendations on maintenance and replacement.

Minimum Efficiency Reporting Values, or MERVs, report a filter’s ability to capture larger particles between 0.3 and 10 microns (µm). This value is helpful in comparing the performance of different filters

The rating is derived from a test method developed by the American Society of Heating, Refrigerating, and Air Conditioning Engineers (ASHRAE) [see www.ashrae.org ].
The higher the MERV rating the better the filter is at trapping specific types of particles.
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Miter Attachment
A miter is any angled cut on a piece of wood, tile or porcelain, the most common being 22.5° and 45° miter bevel cuts so it can connect with another piece.

A beveled cut is also called a Miter Cut. The cuts are usually across the edge or the face of the lumber, tile or porcelain. Face mitering can be seen in photo frames and molding, while edge miters are seen in cabinet corner joints, and similar box construction. Because most miters are on the end grain of a piece of wood or tile, adhesive doesn’t hold well when connecting to another piece. To counteract that, nails and dowels are often used.


Average cut time of 12-16 seconds per foot for typical porcelain tile.

– 24″ Miter Cut length capacity
– Miter up to 3/4 inch materials
– 22.5° and 45° miter bevel cuts
– iQ Quick Clamps facilitate easy setup
Masonry Saw
A saw used to cut masonry units (as brick and tile)
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Quick Spin Filter
The iQ Power Tools Quick Spin filter is a filter that we use for our tile and masonry saws. With this type of filter, you can spin the outside knob and clean the filter quickly so that you can continue with your tasks at hand. Empty the dust tray when appropriate. Easy Cleanup & Recycling.
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Silica
What is Silica? Silica is a chemical compound that is the main constituent of most of the Earth’s rocks. Silica occurs naturally in crystalline forms, such as quartz. This aggregate of stone, sand concrete, concrete block, CMUs, or pavers is used to make concrete and many other construction materials.

Respirable Silica dust is created during the chipping, cutting, or grinding of construction materials and becomes hazardous when tiny, breathable particles are inhaled. These respirable dust particles can penetrate deep into the lungs and cause disabling and sometimes fatal lung diseases. These diseases include COPD, silicosis, lung cancer, kidney disease, and non-malignant respiratory diseases such as bronchitis. Symptoms of silica dust inhalation may include shortness of breath, fatigue, fever, loss of appetite, cyanosis, severe cough, and chest pains.

You can read more about the dangers of Silica here
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Tile Saw
A saw designed to cut ceramic tiles.
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Wet Tile Saw
What Is a Wet Tile Saw?

A wet tile saw cuts tiles made of ceramic, leaving a clean, smooth edge. A tile setter needs to trim tiles at the installation site to fit a room’s edges or create inventive designs. A table-mounted, portable wet tile saw allows the ability to cut tile as they are needed to exact specifications. The saw combines a circular blade, similar to a wood table saw, with a water pump and hose to regularly drench the cutting area with water to reduce friction and cool the surface.


Since tiles are thick, brittle, and made of ceramic, a special saw must be utilized by contractors. An ordinary circular saw for wood or metal would either break the tile or get so hot that it would seize up and stop cutting. However, ceramic tile is not cut well with sharp blades. The wet tile saw was invented to address all these unique properties of ceramic. It doesn’t overheat, uses a relatively dull blade with no serrations, and can be transported to a job site and set up on top of an existing table or sawhorses.
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