Blueprint Reading & Interpretation Flashcards
7 cards from real CFP practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Blueprint Reading & Interpretation flashcards as text
What does the abbreviation 'O.C.' mean when shown next to a post spacing dimension on a fence plan?
Answer: On Center
'O.C.' means 'On Center,' indicating that the dimension is measured from the center of one post to the center of the next post.
A fence drawing legend shows a symbol consisting of two parallel lines with diagonal hatching between them. This most likely represents:
Answer: A retaining wall
Two parallel lines with diagonal hatching between them is the standard architectural symbol for a retaining wall in plan view.
Which type of blueprint drawing would you consult to determine the required concrete footing diameter for a line post?
Answer: Structural or foundation detail
Structural or foundation details show footing dimensions, depths, concrete specifications, and post-to-footing connections.
A fence blueprint uses the scale 1:50. If a gate opening measures 18mm on the drawing, what is the actual field dimension?
Answer: 900 mm
At a 1:50 scale, each millimeter on paper represents 50 mm in reality; 18 mm × 50 = 900 mm (approximately 3 feet).
On a fence site plan, a circle with a cross (+) inside it typically denotes:
Answer: A survey benchmark or control point
A circled cross is the conventional symbol for a survey benchmark or control point used to establish accurate field measurements.
A specification note reads 'Verify in field prior to construction.' What does this instruction require the fence installer to do?
Answer: Confirm actual site conditions match the drawing before installing
This note requires the installer to physically check that existing site conditions (grades, utilities, property lines) correspond to what is shown on the drawings before proceeding.
A fence plan drawing shows a 'HOLD' dimension callout. What does this mean?
Answer: This dimension is critical and must not be changed without engineer approval
A 'HOLD' dimension is a critical control dimension that must be maintained exactly as shown and cannot be adjusted without formal design approval.