A foundation plan shows a continuous footing with the notation '24"x12"'. What do these dimensions represent?
Correct Answer
D) 24-inch width, 12-inch depth
For continuous footings, dimensions are typically given as width x depth. The 24-inch width provides the bearing area, while the 12-inch depth provides the structural thickness of the footing.
Why This Is the Correct Answer
In foundation construction, continuous footing dimensions follow the standard convention of width x depth (or thickness). The 24-inch width is the horizontal dimension that distributes the load across the soil, providing adequate bearing area. The 12-inch depth refers to the vertical thickness of the concrete footing, which must be sufficient to resist bending and provide structural integrity. This notation system is universally used in construction drawings to avoid confusion.
Why the Other Options Are Wrong
Option B: 24-inch depth, 12-inch width
This misinterprets the units and dimensional meaning. Continuous footings run along the entire length of a foundation wall, so specifying a 24-foot length segment would be meaningless. Additionally, the notation uses inches (indicated by the quotation marks), not feet, and both dimensions refer to the cross-sectional profile of the footing.
Option C: 24-foot length, 12-inch width
This completely misunderstands footing notation. The dimensions shown are not related to spacing between footings or reinforcement specifications. Reinforcement details would be shown separately with rebar callouts, spacing notations, or detailed sections. Footing spacing is not applicable since continuous footings run continuously under foundation walls.
Memory Technique
Use 'WiDe' - Width first, then Depth. Just like measuring lumber at the store, you always say width before thickness (2x4, 2x6, etc.).
Reference Hint
Florida Building Code, Chapter 18 - Soils and Foundations, or ACI 318 Building Code Requirements for Structural Concrete, Section on Footings
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
Related Study Resources
Previous Question
During a cut and fill operation, the contractor discovers that 1,200 cubic yards of soil must be moved from the cut area to the fill area. If the soil has a swell factor of 25%, how many cubic yards will need to be hauled?
Next Question
A contractor needs to span 14 feet with 2x10 Douglas Fir joists spaced 16 inches on center for a residential floor. According to span tables, what is the minimum grade required?