AR ST Structural Steel Contractor Exam
Questions And Correct Answers
(Verified Answers) Plus Rationale2026
Q&A| Instant Download Pdf
1. What is the primary purpose of structural steel in construction?
A. Decoration
B. Load-bearing
C. Insulation
D. Fireproofing
Rationale: Structural steel is primarily used for its strength and
ability to bear loads in construction.
2. Which ASTM standard covers structural steel shapes?
A. ASTM A36
B. ASTM A992
C. ASTM B209
D. ASTM C33
Rationale: ASTM A992 specifies requirements for structural steel
shapes commonly used in building construction.
3. What is the common unit of measure for structural steel weight?
A. Pounds per cubic inch
B. Pounds per foot
C. Kilograms per meter squared
D. Tons per square foot
Rationale: Structural steel is commonly measured in pounds per foot
for beams, channels, and angles.
4. Which type of steel is most commonly used for structural beams?
A. Stainless steel
B. Tool steel
C. Carbon steel
, D. Alloy steel
Rationale: Carbon steel provides a balance of strength, ductility, and
cost suitable for structural applications.
5. What is the minimum thickness of steel required for exterior beams
exposed to weather?
A. 1/8 inch
B. 1/4 inch
C. Depends on design and loading
D. 1/2 inch
Rationale: Steel thickness is determined by structural load
requirements, not a fixed minimum.
6. Which of the following is a common method of joining structural steel?
A. Welding
B. Riveting
C. Bolting
D. All of the above
Rationale: Structural steel can be joined using welding, bolting, or
riveting depending on design and site conditions.
7. What is the maximum allowable deflection for a steel beam under live
load?
A. Span/100
B. Span/200
C. Span/360
D. Span/500
Rationale: The common deflection limit for live load on floors is
L/360 to prevent excessive sagging.
8. Which of the following factors affects steel strength the most?
A. Color
B. Cross-sectional shape
C. Length of steel
D. Surface finish
Rationale: The cross-sectional shape of steel determines its moment
of inertia, which affects strength.
9. What type of corrosion protection is commonly applied to structural
steel?
A. Galvanizing
B. Painting
, C. Powder coating
D. All of the above
Rationale: Structural steel may be protected from corrosion using
galvanizing, paint, or other coatings.
10. Which method is preferred for lifting large steel beams safely?
A. Chain hoist
B. Cranes with rigging
C. Manual lifting
D. Forklift
Rationale: Cranes with proper rigging are the safest method for
lifting large, heavy steel beams.
11. What is the main advantage of using welded connections over
bolted connections?
A. Easier to install
B. Continuous load transfer
C. Less skilled labor required
D. Lower cost
Rationale: Welded connections provide a continuous load path and
eliminate slip between members.
12. What is the standard shape designation for I-beams in the U.S.?
A. S-shape
B. W-shape
C. C-shape
D. L-shape
Rationale: Wide-flange I-beams are designated as W-shapes in the
U.S.
13. Which of the following is considered a structural steel grade for
bridges?
A. A36
B. A709
C. AISI 1018
D. ASTM B209
Rationale: ASTM A709 is a standard specification for structural steel
used in bridge construction.
14. What type of steel connection allows for some movement under
thermal expansion?
A. Rigid welded
Questions And Correct Answers
(Verified Answers) Plus Rationale2026
Q&A| Instant Download Pdf
1. What is the primary purpose of structural steel in construction?
A. Decoration
B. Load-bearing
C. Insulation
D. Fireproofing
Rationale: Structural steel is primarily used for its strength and
ability to bear loads in construction.
2. Which ASTM standard covers structural steel shapes?
A. ASTM A36
B. ASTM A992
C. ASTM B209
D. ASTM C33
Rationale: ASTM A992 specifies requirements for structural steel
shapes commonly used in building construction.
3. What is the common unit of measure for structural steel weight?
A. Pounds per cubic inch
B. Pounds per foot
C. Kilograms per meter squared
D. Tons per square foot
Rationale: Structural steel is commonly measured in pounds per foot
for beams, channels, and angles.
4. Which type of steel is most commonly used for structural beams?
A. Stainless steel
B. Tool steel
C. Carbon steel
, D. Alloy steel
Rationale: Carbon steel provides a balance of strength, ductility, and
cost suitable for structural applications.
5. What is the minimum thickness of steel required for exterior beams
exposed to weather?
A. 1/8 inch
B. 1/4 inch
C. Depends on design and loading
D. 1/2 inch
Rationale: Steel thickness is determined by structural load
requirements, not a fixed minimum.
6. Which of the following is a common method of joining structural steel?
A. Welding
B. Riveting
C. Bolting
D. All of the above
Rationale: Structural steel can be joined using welding, bolting, or
riveting depending on design and site conditions.
7. What is the maximum allowable deflection for a steel beam under live
load?
A. Span/100
B. Span/200
C. Span/360
D. Span/500
Rationale: The common deflection limit for live load on floors is
L/360 to prevent excessive sagging.
8. Which of the following factors affects steel strength the most?
A. Color
B. Cross-sectional shape
C. Length of steel
D. Surface finish
Rationale: The cross-sectional shape of steel determines its moment
of inertia, which affects strength.
9. What type of corrosion protection is commonly applied to structural
steel?
A. Galvanizing
B. Painting
, C. Powder coating
D. All of the above
Rationale: Structural steel may be protected from corrosion using
galvanizing, paint, or other coatings.
10. Which method is preferred for lifting large steel beams safely?
A. Chain hoist
B. Cranes with rigging
C. Manual lifting
D. Forklift
Rationale: Cranes with proper rigging are the safest method for
lifting large, heavy steel beams.
11. What is the main advantage of using welded connections over
bolted connections?
A. Easier to install
B. Continuous load transfer
C. Less skilled labor required
D. Lower cost
Rationale: Welded connections provide a continuous load path and
eliminate slip between members.
12. What is the standard shape designation for I-beams in the U.S.?
A. S-shape
B. W-shape
C. C-shape
D. L-shape
Rationale: Wide-flange I-beams are designated as W-shapes in the
U.S.
13. Which of the following is considered a structural steel grade for
bridges?
A. A36
B. A709
C. AISI 1018
D. ASTM B209
Rationale: ASTM A709 is a standard specification for structural steel
used in bridge construction.
14. What type of steel connection allows for some movement under
thermal expansion?
A. Rigid welded
