When reviewing a detail drawing that shows a 1/2" = 1'-0" scale, what is the actual dimension if a component measures 3 inches on the drawing?
Correct Answer
B) 6 feet
At 1/2" = 1'-0" scale, each 1/2 inch on the drawing equals 1 foot actual. Since 3 inches ÷ 0.5 inches = 6, the actual dimension is 6 feet.
Why This Is the Correct Answer
The scale 1/2" = 1'-0" means that every half inch on the drawing represents one foot in actual construction. To solve this, we need to determine how many half-inch increments are in 3 inches (which is 6), then multiply by 1 foot per increment. This gives us 6 × 1 foot = 6 feet actual dimension.
Why the Other Options Are Wrong
Option A: 3 feet
This answer suggests a scale of 1" = 4'-0", which is not the scale given in the problem.
Option C: 12 feet
This answer would be correct if the scale were 1" = 1'-0", but with the given scale of 1/2" = 1'-0", the actual dimension is twice as large.
Memory Technique
Remember 'Half and Double': when the drawing scale uses 1/2 inch, you're doubling the measurement (3 inches becomes 6 feet because 3 ÷ 0.5 = 6).
Reference Hint
Florida Building Code - Chapter 1, Definitions and General Requirements, or architectural drawing standards section
More Project Mgmt Questions
What is the minimum R-value required for wall insulation in Florida Climate Zone 2?
A subcontractor brings a new chemical product to your jobsite. Under the Globally Harmonized System (GHS), what information must be immediately available to workers?
A construction site has a trench that is 8 feet deep in Type B soil. What is the maximum allowable slope ratio for the trench walls without protective systems?
What is the maximum recommended spacing between drywall screws when attaching to wood studs?
Your crew discovers suspected asbestos-containing materials during a renovation project. What is the first action you should take?
A scaffold platform is 12 feet long and 5 feet wide. If the maximum load capacity is 25 pounds per square foot, what is the total weight capacity of this platform?
Which CSI MasterFormat Division would contain specifications for fire-stopping and firesafing materials?
In tilt-up concrete construction, what is the primary advantage of this method over conventional cast-in-place construction?
Which OSHA standard specifically addresses construction industry safety and health regulations?
A structural drawing shows a beam labeled 'W12x26'. What does the '26' represent?
People Also Study
Business & Financial Management
120 questions · 70% to pass
Contract Administration
60 questions · 70% to pass