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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.
Applications of this function are in mechanically stabilized and retained earth walls and steep soil slopes; they can be combined with masonry facings to create vertical retaining walls. Also involved is the application of basal reinforcement over soft soils and over deep foundations for embankments and heavy surface loadings.
The wall face is often of precast, segmental blocks, panels or geocells that can tolerate some differential movement. The walls are infilled with granular soil, with or without reinforcement, while retaining the backfill soil. Reinforced walls utilize horizontal layers typically of geogrids. The reinforced soil mass, along with the facing ...
The overall thickness of sandwich wall panels in commercial applications is typically 8 inches, but their designs are often customized to the application. In a typical 8-inch wall panel the concrete wythes are each 2-3/8 inches thick), sandwiching 3-1/4 inches of high R-value insulating foam. The interior and exterior wythes of concrete are ...
Orangeburg was a low cost alternative to metal for sewer lines in particular. Lack of strength causes pipes made of Orangeburg to fail more frequently than pipes made with other materials. The useful life for an Orangeburg pipe is about 50 years under ideal conditions, but has been known to fail in as little as 10 years.
Nov. 24—While discussing auto theft numbers earlier this month, the Albuquerque Police Department touted a new crime-fighting tool: the Grappler Police Bumper, a device used to stop fleeing ...
Perforated metal has been utilized across a variety of industries including, but not limited to: Ceiling of Culture Palace (Tel Aviv) concert hall is covered with perforated metal panels Perforated steel Marston Matting airfield. Architectural - infill panels, sunshade, cladding, column covers, metal signage, site amenities, fencing screens ...
In 2021, California cities spent more than $14.8 billion on policing and counties spent $7.5 billion, and the state spent $2.8 billion on the California Highway Patrol, according to the ...