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Key Facts: SC Wood Frame Structures Exam

50 Q

Official Exam Questions

PSI SC Commercial Contractor CIB updated 5/15/2025

70%

Passing Score

PSI SC Commercial Contractor CIB updated 5/15/2025

3 hours

Time Allowed

PSI SC Commercial Contractor CIB updated 5/15/2025

USD 75

PSI Exam Fee

PSI SC Commercial Contractor CIB updated 5/15/2025

Open Book

Book Policy

PSI SC Commercial Contractor CIB updated 5/15/2025

South Carolina Wood Frame Structures Contractor Examination is the official CLB/PSI open-book exam: 50 questions, 70% (35 of 50), 3 hours, USD 75 (bulletin updated 5/15/2025). Official delivery is English.

Sample SC Wood Frame Structures Practice Questions

Try these sample questions to review concepts for the SC Wood Frame Structures exam. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1Under 29 CFR 1926.501, when must an employee on a walking/working surface with an unprotected side or edge be protected by a guardrail, safety net, or personal fall-arrest system?
A.When the fall to a lower level is 6 feet or more
B.When the fall to a lower level is 10 feet or more
C.When the fall to a lower level is 4 feet or more
D.Only when the employee is working on a steep-slope roof
Explanation: OSHA 1926.501(b)(1) requires conventional fall protection once an unprotected side or edge is 6 feet or more above a lower level. The same 6-foot trigger applies to residential construction under 1926.501(b)(13). The 10-foot figure is the scaffold-platform trigger in Subpart L, and the 4-foot figure is a general-industry walking-working-surface rule, not construction Subpart M.
2What is the required top-edge height of a construction guardrail system under 29 CFR 1926.502(b)?
A.42 inches, plus or minus 3 inches
B.36 inches, plus or minus 2 inches
C.39 inches exactly, with no tolerance
D.48 inches, plus or minus 1 inch
Explanation: OSHA 1926.502(b)(1) sets the top-rail height at 42 inches plus or minus 3 inches above the walking/working surface (39 to 45 inches). Midrails, when used, are installed midway between the top rail and the surface. The system must resist 200 pounds applied within 2 inches of the top edge.
3A carpenter is working on a supported scaffold platform 12 feet above grade. Which OSHA rule governs fall protection on that scaffold?
A.Subpart M requires protection only if the platform is 6 feet or higher, and a warning line alone is enough
B.Only a safety monitor is required on any scaffold under 20 feet
C.No fall protection is required on scaffolds until the platform reaches 15 feet
D.Subpart L requires each employee on a scaffold more than 10 feet above a lower level to be protected from falling
Explanation: Scaffold work is governed by 29 CFR 1926 Subpart L. Section 1926.451(g)(1) requires fall protection for each employee on a scaffold more than 10 feet above a lower level. Subpart M's 6-foot rule does not replace that scaffold-specific trigger. At 12 feet, guardrails (or another system allowed for that scaffold type) are required.
4When a portable ladder is used to reach an upper landing, how far must the side rails extend above that landing under 29 CFR 1926.1053(b)(1)?
A.At least 3 feet
B.At least 2 feet
C.At least 42 inches for every portable ladder, the same as a fixed ladder
D.No extension is required if a coworker foot-ties the base
Explanation: OSHA 1926.1053(b)(1) requires portable-ladder side rails to extend at least 3 feet (0.9 m) above the upper landing. If that extension is impossible, the ladder must be secured at the top and a grasping device provided. The 42-inch extension is the fixed-ladder rule in 1926.1053(a)(24), not the portable-ladder rule.
5Unless a qualified person designs the complete personal fall-arrest system, what is the minimum anchorage strength required for each employee attached to a PFAS under 29 CFR 1926.502(d)?
A.1,800 pounds
B.5,000 pounds
C.3,000 pounds
D.10,000 pounds
Explanation: OSHA 1926.502(d)(15) requires PFAS anchorages to support at least 5,000 pounds per employee attached, or to be designed, installed, and used as part of a complete PFAS that maintains a safety factor of at least two under the supervision of a qualified person. The 1,800-pound figure is the maximum arresting force on the employee, not the anchor rating.
6What is the commonly applied setup ratio for a non-self-supporting portable ladder so that it is used at about 75-1/2 degrees from horizontal?
A.1:1 — base one foot out for each foot of working length
B.2:1 — base one foot out for each two feet of working length
C.4:1 — base one foot out for each four feet of working length to the support
D.6:1 — base one foot out for each six feet of working length
Explanation: OSHA 1926.1053 and appendix guidance use a 4:1 setup: place the base one foot from the supporting wall for every four feet of working length to the upper support. That geometry is about 75-1/2 degrees from horizontal, the angle used when load-testing non-self-supporting portable ladders. A steeper or flatter set-up increases slip or tip risk.
7On a low-slope roof, when mechanical equipment is not being used, how far from the roof edge must a warning-line system be erected under 29 CFR 1926.502(f)?
A.Not less than 6 feet from the roof edge
B.Not less than 4 feet from the roof edge
C.Not less than 15 feet from the roof edge
D.Warning lines may be placed at the drip edge if flagged every 20 feet
Explanation: OSHA 1926.502(f)(1)(i) requires the warning line to be erected not less than 6 feet from the roof edge when mechanical equipment is not being used. When mechanical equipment is used, the line must be at least 6 feet from the edge parallel to the direction of travel and at least 10 feet from the edge perpendicular to that travel. A line at the drip edge is not a warning-line system.
8How must a positioning-device system be rigged under 29 CFR 1926.502(e), compared with a personal fall-arrest system?
A.The employee may free-fall up to 6 feet, the same as PFAS
B.Positioning devices have no free-fall limit if the anchor is rated 5,000 pounds
C.The employee cannot free-fall more than 12 inches
D.The employee cannot free-fall more than 2 feet
Explanation: A positioning-device system (1926.502(e)) is work-positioning, not fall arrest. It must be rigged so the employee cannot free-fall more than 2 feet. A PFAS may allow up to 6 feet of free fall and must be rigged so the worker cannot contact a lower level. Using a positioning belt as if it were a PFAS is a common and dangerous mix-up.
9A 2-foot by 3-foot opening is cut in a second-floor deck for a future stair. What does OSHA 1926.502(i) require of the hole cover?
A.A sheet of 1/2-inch drywall laid over the opening is acceptable if someone is assigned to watch it
B.The cover must support twice the weight of employees, equipment, and materials that may be imposed, be secured against displacement, and be color-coded or marked HOLE or COVER
C.Any plywood scrap is acceptable if it overlaps the hole by 1 inch on two sides
D.Covers are optional if the hole is smaller than 3 feet in any dimension
Explanation: OSHA 1926.502(i) requires covers to support twice the intended load, to be secured so they cannot be displaced accidentally, and to be color-coded or marked with the word HOLE or COVER. Floor holes, including stair openings, require covers or a guardrail system. Drywall and undersized scraps do not meet the strength or marking rules.
10On a wood-frame residential project 9 feet above grade, the employer wants to use a written fall-protection plan instead of guardrails, nets, or PFAS. When does OSHA 1926.501(b)(13) allow that plan?
A.Anytime the contractor prefers a monitor because PFAS slows production
B.Only when the employer demonstrates that conventional systems are infeasible or create a greater hazard, and then implements a plan meeting 1926.502(k)
C.Whenever the building is a one- or two-family dwelling, with no further showing required
D.Only after a worker has already fallen and the competent person documents the incident
Explanation: Residential construction still requires conventional fall protection at 6 feet. OSHA 1926.501(b)(13) allows a 1926.502(k) fall-protection plan only if the employer shows conventional systems are infeasible or create a greater hazard. There is a presumption that at least one conventional system is feasible; production speed is not that showing. STD 03-11-002 withdrew the old residential exemption.

About the SC Wood Frame Structures Exam

The South Carolina Wood Frame Structures Contractor Examination is the official CLB classification examination administered by PSI. The official exam has 50 scored questions. Passing is 70% (35 of 50) in 3 hours. The examination is open book. PSI lists USD 75 (Candidate Information Bulletin updated 5/15/2025). Candidates must also pass Business Management and Law for Commercial Contractor. This bank is an English-language MCQ study adaptation. It does not replace required trade experience, board approval, or the official examination.

Exam sponsor: PSI Services LLC (for the South Carolina Contractor's Licensing Board). The requirements and fees below concern the certification or admission exam, separate from our free practice resources.

Assessment

Open-book computer-based multiple-choice. Allowed references include the 2021 IBC with SC modifications or 2018 SC Building Code, OSHA 29 CFR 1926, Carpentry and Building Construction (2016), BCSI Guide to Good Practice for Metal Plate Connected Wood Trusses (2018, updated March 2020), and the South Carolina 811 Excavator Manual.

Time Limit

3 hours

Passing Score

70% (35 of 50)

Exam / Certification Fees

USD 75

Exam sponsor website

Fees, eligibility, and exam policies can change. Confirm them with the exam sponsor before applying or paying.

Our practice resources: topics covered

We aim to reflect publicly available exam outlines and topic information in our study resources. Coverage, format, and difficulty may differ from the actual exam, and we cannot guarantee that every detail is accurate or current. Confirm exam requirements, fees, and policies with the official exam sponsor.

10%

Safety

Safety (5 items)

14%

Concrete Earthwork

Concrete - Earthwork (7 items)

18%

Concrete

Concrete (9 items)

32%

Rough Carpentry

Carpentry - Rough (16 items)

12%

Manufactured Trusses

Carpentry - Manufactured Trusses (6 items)

14%

Roofing

Roofing (7 items)

Preparing for the SC Wood Frame Structures Exam

What You Need to Know

  • Passing score: 70% (35 of 50)
  • Assessment: Open-book computer-based multiple-choice. Allowed references include the 2021 IBC with SC modifications or 2018 SC Building Code, OSHA 29 CFR 1926, Carpentry and Building Construction (2016), BCSI Guide to Good Practice for Metal Plate Connected Wood Trusses (2018, updated March 2020), and the South Carolina 811 Excavator Manual.
  • Time limit: 3 hours
  • Exam / certification fees: USD 75 Official sources

Using Our Practice Resources

  • Work through all 100 available questions
  • Review every answer and explanation
  • Track weak areas and revisit them
  • Use our AI tutor for tough concepts

SC Wood Frame Structures: Suggested Study Strategy

1Distribute study time to the official PSI content outline (bulletin updated 5/15/2025)
2Use only the PSI-listed references; temporary tabs such as Post-it notes are prohibited
3Pass Business Management and Law for Commercial Contractor in addition to this technical examination
4This bank is an English-language MCQ study aid, not an official PSI form

Frequently Asked Questions

How many questions are on the South Carolina Wood Frame Structures Contractor Examination?

The official PSI examination has 50 scored questions. Passing is 70% (35 of 50) within 3 hours (Commercial Contractor Candidate Information Bulletin updated 5/15/2025).

How much does this PSI examination cost?

PSI lists USD 75 for this examination. The South Carolina Contractor's Licensing Board charges a separate USD 350 license application fee for general and mechanical contractor licenses.

Is this examination open book?

Yes. PSI lists the South Carolina commercial contractor examinations as open book. Listed references include the 2021 IBC with SC modifications and the BCSI truss-bracing guide.

What is the largest topic on the SC Wood Frame Structures exam?

The official PSI outline assigns 16 of 50 items to Carpentry - Rough.