A site plan shows a building setback dimension of 25'-0" from the property line, but the actual scaled measurement shows 20'-0". Which dimension should be used for construction?
Correct Answer
D) Use the written dimension of 25'-0"
Written dimensions always take precedence over scaled measurements on construction drawings. Scaling can be affected by paper shrinkage, copying, and other factors, making written dimensions more reliable.
Why This Is the Correct Answer
Written dimensions always take precedence over scaled measurements on construction drawings because they represent the architect's or engineer's exact intent. Scaled measurements can be inaccurate due to paper shrinkage, photocopying distortion, printing errors, or improper scaling tools. This is a fundamental principle in construction document interpretation that protects against measurement errors and ensures compliance with design intent. Using the written dimension of 25'-0" maintains the proper setback requirements as originally designed.
Why the Other Options Are Wrong
Option A: Use the scaled dimension of 20'-0"
Averaging dimensions is not an acceptable practice in construction. This could result in a 22.5' setback that doesn't meet the design intent and may violate zoning requirements.
Option B: Use the average of both dimensions
Scaled dimensions are unreliable due to potential paper shrinkage, copying distortion, and measurement errors. Using 20'-0" could violate setback requirements and create legal issues.
Memory Technique
Think 'Words Win' - written dimensions always win over scaled measurements, just like written contracts win over verbal agreements.
Reference Hint
Florida Building Code, Chapter 1 - Scope and Administration, or AIA Document standards for construction document interpretation
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