When establishing site layout using batter boards, what is the primary purpose of the batter board system?
Correct Answer
B) To establish and maintain building corner locations and elevations during excavation
Batter boards are temporary wooden frames set up at building corners to hold strings that mark the exact location of foundation walls and footings. They allow the building layout to be re-established after excavation disturbs the original stakes.
Why This Is the Correct Answer
Batter boards are specifically designed to establish and maintain precise building corner locations and elevations throughout the construction process. They consist of horizontal boards attached to stakes placed beyond the excavation area, with strings stretched between them to mark foundation walls and footings. This system allows contractors to accurately re-establish building layout after excavation work disturbs the original survey stakes. The batter boards serve as permanent reference points that remain undisturbed during earthwork operations.
Why the Other Options Are Wrong
Option A: To provide temporary electrical service to the construction site
Batter boards have nothing to do with electrical service - they are purely for surveying and layout purposes. Temporary electrical service involves setting up power panels, outlets, and electrical connections for construction equipment and tools.
Option C: To support concrete forms during the pour
Batter boards are not used to support concrete forms. Form support comes from bracing, ties, and scaffolding systems designed to withstand the pressure of wet concrete. Batter boards are removed or relocated before concrete operations begin.
Option D: To create a safety barrier around excavated areas
Safety barriers around excavations are typically orange safety fencing, barricades, or guardrails. Batter boards are layout tools positioned outside the excavation area and would not provide adequate safety protection for workers or the public.
Memory Technique
Think 'BATTER = Building Alignment Through Temporary External References' - the boards are external reference points that maintain building alignment during construction phases.
Reference Hint
Look up site layout and surveying sections in construction management or building construction fundamentals chapters, typically found under 'Site Preparation' or 'Foundation Layout' topics.
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