Couverture de IB - Witness Posts - Survey and Plan Rule - v1.3

IB - Witness Posts - Survey and Plan Rule - v1.3

IB - Witness Posts - Survey and Plan Rule - v1.3

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What do you do when the true corner is in the middle of a river or inside a concrete pillar?

We shed light on the strict rules for "Witness Posts."

Learn how to properly monument, mark, and record a W.T. on your plan so future surveyors can find the invisible corner.

Key Study Points:

When to Witness: The criteria for when a true corner is "inaccessible."

Marking Requirements: The specific "W.T." stamping and bearing/distance inscriptions required on the post.

The Exam Trap: Placing a witness post too far from the true corner, violating the SPR distance limitations.

Sources & Required Reading:

ABCLS IB - Witness Posts

Survey and Plan Rules

06 - PRM Chapter 7 (Field Work)

07 - PRM Chapter 8 (Principles of Boundary Surveys)

Resources: IB PDF | Infographic | Quiz

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