Start Every Drawing Review With Control

The move: find the control before trusting the detail. Control comes first Every site plan is anchored to a reference. In civil work, the reference may be a national datum, a project benchmark, a local grid, a station baseline, or a mixture that must be translated carefully. If you skip this layer, you may spend an hour checking details that are all referenced to the wrong base. Datums make elevations meaningful An elevation number is not self-explanatory. It depends on the vertical datum or local benchmark used to produce it. This matters on grading, drainage, retaining walls, curb returns, building…

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