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  2. Trench drain - Wikipedia

    en.wikipedia.org/wiki/Trench_drain

    Concrete will need to be poured to surround the trench drain so that the load can be transferred from the channel and grate to the surrounding areas. Pre-cast trench drains generally come in 4-inch (100 mm) widths but can range anywhere from a 1.75-inch (44 mm) slot to 2-inch (51 mm) wide channels with grates, and up to any size imaginable ...

  3. Invert level - Wikipedia

    en.wikipedia.org/wiki/Invert_level

    In civil engineering, the invert level is the base interior level of a pipe, trench or tunnel; it can be considered the "floor" level. [1] The invert is an important datum for determining the functioning or flowline of a piping system.

  4. Shoring - Wikipedia

    en.wikipedia.org/wiki/Shoring

    Shoring is designed to prevent collapse where shielding is only designed to protect workers when collapses occur. Concrete-structure and stone-building shoring, in these cases also referred to as falsework, provides temporary support until the concrete becomes hard and achieves the desired strength to support loads.

  5. French drain - Wikipedia

    en.wikipedia.org/wiki/French_drain

    A diagram of a traditional French drain. A French drain [1] (also known by other names including trench drain, blind drain, [1] rubble drain, [1] and rock drain [1]) is a trench filled with gravel or rock, or both, with or without a perforated pipe that redirects surface water and groundwater away from an area.

  6. Concrete slab - Wikipedia

    en.wikipedia.org/wiki/Concrete_slab

    A concrete slab is a common structural element of modern buildings, consisting of a flat, horizontal surface made of cast concrete. Steel- reinforced slabs, typically between 100 and 500 mm thick, are most often used to construct floors and ceilings, while thinner mud slabs may be used for exterior paving ( see below ).

  7. Tremie - Wikipedia

    en.wikipedia.org/wiki/Tremie

    The tremie concrete placement method uses a vertical or nearly vertical pipe, through which concrete is placed by gravity feed below water level. [4]The lower end of the pipe is kept immersed in fresh concrete so that concrete rising from the bottom displaces the water above it, thus limiting washing out of the cement content of the fresh concrete at the exposed upper surface.

  8. Concrete slab crushes 2 workers at JFK Airport, feds say ...

    www.aol.com/concrete-slab-crushes-2-workers...

    A company faces nearly $60,000 in fines after two workers were crushed by a concrete slab at New York’s JFK Airport earlier this year, federal officials say. ... Employees worked in a trench ...

  9. Shallow foundation - Wikipedia

    en.wikipedia.org/wiki/Shallow_foundation

    The slab can be decoupled from ground temperatures by insulation, with the concrete poured directly over insulation (for example, extruded polystyrene foam panels), or heating provisions (such as hydronic heating) can be built into the slab. Slab-on-grade foundations should not be used in areas with expansive clay soil.

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