What type of lumber grade mark indicates the highest structural grade for dimension lumber?
Correct Answer
B) Select Structural
Select Structural is the highest grade for dimension lumber, indicating the strongest and most defect-free lumber suitable for critical structural applications where high strength values are required.
Why This Is the Correct Answer
Select Structural is indeed the highest grade for dimension lumber in the structural grading system. This grade represents lumber with the fewest defects and highest strength properties, making it suitable for critical load-bearing applications. The grading system is hierarchical, with Select Structural at the top, followed by No. 1, No. 2, No. 3, Construction, Standard, and Utility grades in descending order of structural quality.
Why the Other Options Are Wrong
Option A: Construction Grade
Construction Grade is a lower structural grade used for general framing applications where high strength is not critical. It falls below Select Structural in the grading hierarchy and contains more defects that reduce its load-bearing capacity.
Option C: Standard Grade
Standard Grade is a light framing grade that ranks below Construction Grade and is used for non-structural applications or where minimal loads are expected. It has more defects and lower strength values than Select Structural.
Option D: Utility Grade
Utility Grade is the lowest structural grade, used for temporary construction, blocking, or other applications where appearance and high strength are not important. It has the most defects and lowest allowable stress values.
Memory Technique
Use the acronym 'SS' for 'Select Structural = Strongest Structure' - the double S reminds you it's the top grade for structural lumber
Reference Hint
Florida Building Code Chapter 23 - Wood, or AWC National Design Specification (NDS) for Wood Construction - Section 4.0 Sawn Lumber
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?
A detail drawing shows a scale of 3/4" = 1'-0". If a dimension measures 2.25 inches on the drawing, what is the actual dimension?
What is the maximum recommended spacing between drywall screws when attaching to wood studs?
People Also Study
Business & Financial Management
120 questions · 70% to pass
Contract Administration
60 questions · 70% to pass