When establishing site layout for a commercial building, what is the primary purpose of batter boards?
Correct Answer
D) To maintain building lines and elevation during construction
Batter boards are temporary frames set up at building corners to maintain accurate building lines and elevations throughout construction. They allow strings to be stretched between them to mark foundation walls and other structural elements.
Why This Is the Correct Answer
Batter boards are temporary wooden frames erected at building corners that serve as permanent reference points throughout construction. They maintain accurate building lines by allowing strings to be stretched between them, marking foundation walls and other structural elements. Their primary function is to preserve both horizontal alignment (building lines) and vertical positioning (elevations) even after initial surveying stakes are removed during excavation. This ensures the building maintains proper dimensions and positioning from start to finish.
Why the Other Options Are Wrong
Option A: To support concrete forms during placement
Batter boards primarily establish horizontal reference lines and elevations, not excavation depth. Excavation depth is typically determined by separate elevation benchmarks and grade stakes.
Option B: To establish reference points for excavation depth
Batter boards don't support concrete forms. They're reference structures that remain outside the construction area. Concrete forms are supported by their own bracing systems, stakes, and ties.
Memory Technique
Think 'BATTER UP' - Batter boards are UP and away from the actual construction to maintain reference lines, just like a baseball batter steps UP to the plate to maintain position.
Reference Hint
Florida Building Code, Chapter 18 - Soils and Foundations, or construction surveying sections in contractor reference materials
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