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2. Sanitary manhole - Wikipedia

   en.wikipedia.org/wiki/Sanitary_manhole

   Currently, precast concrete is the most common material for new manholes, but bricks and concrete blocks are still used in special situations such as when the work sites are in small area which are unsuitable for precast concrete lifting operations, or for chemical waste lines. [14]

3. Compressed earth block - Wikipedia

   en.wikipedia.org/wiki/Compressed_earth_block

   Minimal or no need for mortar, thus reducing both the labor and materials costs. Transport cost: Suitable soils are often available at or near the construction site. Strengths might exceed the ASTM standard for concrete blocks (1,900 pounds per square inch (13,000 kPa)) in some instances.

4. Connect Housing Blocks bring modular construction to Columbus ...

   www.aol.com/connect-housing-blocks-bring-modular...

   Each day, two Connect blocks roll off the line, as the factory continues to ramp up production. The factory needs 147 workers to fully operate a shift, up from120 now. "We're still scaling up," he ...

5. Basement - Wikipedia

   en.wikipedia.org/wiki/Basement

   Crawl space vents are openings in the wall which allow air movement. Such vents are usually fitted with metal grating, mesh, or louvers which can block the movement of rodents and vermin but generally not insects such as termites and carpenter ants. One common rule is to provide vents in cross sectional area equal to 1/150 of the floor area ...

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7. Burial vault (enclosure) - Wikipedia

   en.wikipedia.org/wiki/Burial_vault_(enclosure)

   A burial vault (also known as a burial liner, grave vault, and grave liner) is a container, formerly made of wood or brick but more often today made of metal or concrete, that encloses a coffin to help prevent a grave from sinking. Wooden coffins (or caskets) decompose, and often the weight of earth on top of the coffin, or the passage of heavy ...