NM GS24 Structural Steel Erection Exam
Questions and Answers Plus Rationales
1. What document establishes the sequence and layout that must be
in place before steel erection begins?
A. Fabrication drawing
B. Field welding plan
C. Site layout plan, site-specific erection plan, and construction
sequencing plan
D. Crane lift plan
Answer: C
Rationale: The exam topics indicate that the necessary elements
prior to steel erection include a site layout plan, a site-specific
erection plan, and a construction sequencing plan. Studypool+1
2. Before authorizing the start of steel erection, the blank shall
provide the steel erector with a written notification.
A. Erection foreman
B. Controlling contractor
C. Fabricator
D. Client
Answer: B
Rationale: In the referenced material, the controlling contractor
must provide written notification prior to the start of steel
erection. Studypool+1
3. Which OSHA Subpart covers steel erection operations?
A. Subpart Q
, B. Subpart R
C. Subpart S
D. Subpart T
Answer: B
Rationale: Steel erection is addressed in Subpart R of the OSHA
regulations for construction. Studypool+1
4. According to common “Christmas-treeing” limits, a maximum
of blank members rigged blank feet apart are hoisted per lift.
A. 3 members / 10 ft
B. 5 members / 7 ft
C. 7 members / 5 ft
D. 4 members / 8 ft
Answer: B
Rationale: The example given states “5 members 7 ft” as the limit
for Christmas-treeing rigging per lift. Studypool+1
5. Members being lifted must be attached at:
A. Any convenient point
B. The end only
C. The center of gravity and at a maintained level
D. Two equal slings only
Answer: C
Rationale: Proper rigging requires attachment at the center of
gravity and maintaining a level lift to avoid undue torsion or load
shift. Studypool
6. Structural steel assembly should proceed from:
A. Top down
B. Bottom up
, C. Middle outward
D. Side to side
Answer: B
Rationale: The erection sequence often mandates setting
assemblies from the bottom up for stability and
alignment. Studypool
7. According to standard rules, not more than blank floors between
the erection floor and the uppermost permanent floor are
permitted; and no more than blank bolting/welding incomplete,
whichever is less.
A. 10 floors / 6 floors
B. 12 floors / 5 floors
C. 8 floors / 4 floors
D. 6 floors / 3 floors
Answer: C
Rationale: One sample states “8 floors” and “4 floors or 48 ft” as
limits for unfinished bolting/welding. Studypool+1
8. All columns must be anchored by a minimum of:
A. Four bolts
B. Two anchor bolts
C. Three anchor bolts
D. One anchor bolt and weld
Answer: B
Rationale: The standard requirement in many steel erection
guidelines is at least two anchor bolts to secure a column before
loads are applied. Contractor Exam
, 9. When calculating sling angles for rigging loads, which of the
following increases load on the sling?
A. A 90° angle between sling legs
B. A 120° angle between sling legs
C. A narrower angle between sling legs
D. A 180° angle
Answer: C
Rationale: As the angle between the sling legs becomes narrower
(closer to vertical), the load on each leg increases due to geometry.
10. Which type of connection allows for adjustment after initial
placement of a structural steel member?
A. Welded splice only
B. Fully tightened high-strength bolts
C. Slip-critical bolted connection
D. Bearing-type bolted connection
Answer: D
Rationale: Bearing-type bolted connections permit some
adjustment prior to final tightening, whereas slip-critical or welded
connections are less adjustable once in place.
11. The grade designation “A36” refers to structural steel with a
minimum yield strength of:
A. 30 ksi
B. 36 ksi
C. 40 ksi
D. 42 ksi
Answer: B
Rationale: ASTM A36 structural steel has a specified minimum
yield strength of 36 ksi.
Questions and Answers Plus Rationales
1. What document establishes the sequence and layout that must be
in place before steel erection begins?
A. Fabrication drawing
B. Field welding plan
C. Site layout plan, site-specific erection plan, and construction
sequencing plan
D. Crane lift plan
Answer: C
Rationale: The exam topics indicate that the necessary elements
prior to steel erection include a site layout plan, a site-specific
erection plan, and a construction sequencing plan. Studypool+1
2. Before authorizing the start of steel erection, the blank shall
provide the steel erector with a written notification.
A. Erection foreman
B. Controlling contractor
C. Fabricator
D. Client
Answer: B
Rationale: In the referenced material, the controlling contractor
must provide written notification prior to the start of steel
erection. Studypool+1
3. Which OSHA Subpart covers steel erection operations?
A. Subpart Q
, B. Subpart R
C. Subpart S
D. Subpart T
Answer: B
Rationale: Steel erection is addressed in Subpart R of the OSHA
regulations for construction. Studypool+1
4. According to common “Christmas-treeing” limits, a maximum
of blank members rigged blank feet apart are hoisted per lift.
A. 3 members / 10 ft
B. 5 members / 7 ft
C. 7 members / 5 ft
D. 4 members / 8 ft
Answer: B
Rationale: The example given states “5 members 7 ft” as the limit
for Christmas-treeing rigging per lift. Studypool+1
5. Members being lifted must be attached at:
A. Any convenient point
B. The end only
C. The center of gravity and at a maintained level
D. Two equal slings only
Answer: C
Rationale: Proper rigging requires attachment at the center of
gravity and maintaining a level lift to avoid undue torsion or load
shift. Studypool
6. Structural steel assembly should proceed from:
A. Top down
B. Bottom up
, C. Middle outward
D. Side to side
Answer: B
Rationale: The erection sequence often mandates setting
assemblies from the bottom up for stability and
alignment. Studypool
7. According to standard rules, not more than blank floors between
the erection floor and the uppermost permanent floor are
permitted; and no more than blank bolting/welding incomplete,
whichever is less.
A. 10 floors / 6 floors
B. 12 floors / 5 floors
C. 8 floors / 4 floors
D. 6 floors / 3 floors
Answer: C
Rationale: One sample states “8 floors” and “4 floors or 48 ft” as
limits for unfinished bolting/welding. Studypool+1
8. All columns must be anchored by a minimum of:
A. Four bolts
B. Two anchor bolts
C. Three anchor bolts
D. One anchor bolt and weld
Answer: B
Rationale: The standard requirement in many steel erection
guidelines is at least two anchor bolts to secure a column before
loads are applied. Contractor Exam
, 9. When calculating sling angles for rigging loads, which of the
following increases load on the sling?
A. A 90° angle between sling legs
B. A 120° angle between sling legs
C. A narrower angle between sling legs
D. A 180° angle
Answer: C
Rationale: As the angle between the sling legs becomes narrower
(closer to vertical), the load on each leg increases due to geometry.
10. Which type of connection allows for adjustment after initial
placement of a structural steel member?
A. Welded splice only
B. Fully tightened high-strength bolts
C. Slip-critical bolted connection
D. Bearing-type bolted connection
Answer: D
Rationale: Bearing-type bolted connections permit some
adjustment prior to final tightening, whereas slip-critical or welded
connections are less adjustable once in place.
11. The grade designation “A36” refers to structural steel with a
minimum yield strength of:
A. 30 ksi
B. 36 ksi
C. 40 ksi
D. 42 ksi
Answer: B
Rationale: ASTM A36 structural steel has a specified minimum
yield strength of 36 ksi.
