1. Subtract the elevation in question from the benchmark's elevation. Ignoring the decimal value, the difference is the number of feet below the benchmark. Negative values indicate elevations above the benchmark. For example, given a benchmark at 100
source: www.ehow.com
How to Shoot a Grade in Construction
Shooting grade is the process of testing the elevation of a construction project in order to level or slope it. Shooting grade properly is critical to every facet of construction including excavation, pipe laying and forming footers and foundations. The... More »
Difficulty: Moderately Easy
Source: www.ehow.com
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