from The American Heritage® Dictionary of the English Language, 4th Edition
- n. The level layer of rock or earth upon which the foundation of a road or railway is laid.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. The layer of native soil on which the foundation of a road is laid
from The Century Dictionary and Cyclopedia
- n. A grade of the second rank in zoölogical classification; a prime division of a grade: used like subclass, suborder, etc. See grade, 3.
Crews have discovered that ground beneath the road surface - an area known as the subgrade
Also, the sidewalk, per city standards should be 3.5 inches of concrete on compacted subgrade.
The old Soviet Union turned out industrial product that was mostly subgrade or pure junk.
Other projects include a helical anchor, which can be screwed into the ground and used to support a 10-kilowatt wind turbine, and a Department of Transportation project to develop better roadways by improving the subgrade soil on which roadways are often built.
In the early 1990s, 10 to 16% of the subgrade in the permafrost areas of the Baikal – Amur railroad line was deformed because of permafrost thawing; this increased to 46% in 1998.
But, and this leads back to original analogy, if he cannot definitively tell me whether or not that subgrade can support the structure using all of the industry standard tools at his disposal that have been empirically tested and verified countless times on millions of jobs, then I'm going to be real heistant to recommend the to the client that the project move forward in its current form.
There he subjects the samples to a variety of tests in order to determine the mechanical properties of the subgrade.
Everything, from preparing the subgrade and the foundations, to installing the roofing and finishing the walls, is covered.
With soft clay subgrade, hence the pile-driver for foundations.
Caram specifically mentions that terrorists could use a car bomb in the subgrade areaâ€a situation similar to what occurs in the 1993 bombing see February 26, 1993.
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