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Under OSHA 29 CFR 1926.32(f), who qualifies as a "competent person" for scaffold work?

Any worker with at least five years of scaffold erection experience

A person capable of identifying existing and predictable hazards and who has authority to take corrective action

A licensed professional engineer who has reviewed the scaffold drawings

A supervisor who has completed the OSHA 10-hour construction course

to track

2026 Statistics

Key Facts: SAIA CP Frame Exam

10 ft

Fall Protection Trigger

OSHA 1926.451(g)(1)

4:1

Height-to-Base Ratio Limit

OSHA 1926.452(c)(5)

18 in

Max Screw Jack Extension

OSHA 1926.452(c)(6)

38-45 in

Top Rail Height Range

OSHA 1926.451(g)(4)(ii)

25/50/75

Duty Class Ratings (psf)

OSHA 1926.452(c)

18 in

Minimum Platform Width

OSHA 1926.451(b)(2)

Frame scaffolds are involved in thousands of construction injuries annually, and OSHA identifies missing braces, absent ties, and improper erection as the leading collapse causes. The SAIA Competent Person program equips scaffold supervisors with the hazard-identification skills and OSHA knowledge to protect their crews under 29 CFR 1926.450-454. Passing requires understanding OSHA definitions, load ratings, guardrail requirements, access rules, footing standards, and the 4:1 height-to-base ratio.

Sample SAIA CP Frame Practice Questions

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1Under OSHA 29 CFR 1926.32(f), who qualifies as a "competent person" for scaffold work?

A.Any worker with at least five years of scaffold erection experience

B.A person capable of identifying existing and predictable hazards and who has authority to take corrective action

C.A licensed professional engineer who has reviewed the scaffold drawings

D.A supervisor who has completed the OSHA 10-hour construction course

Explanation: OSHA 1926.32(f) defines a competent person as one who is capable of identifying existing and predictable hazards in surroundings or working conditions that are unsanitary, hazardous, or dangerous to employees, and who has the authority to take prompt corrective measures. Years of experience or a PE license alone do not satisfy this definition.

2OSHA 29 CFR 1926.451 requires that frame scaffolds be inspected by the competent person at which interval?

A.Once before initial use and then weekly thereafter

B.Before each work shift and after any occurrence that could affect structural integrity

C.Daily at the end of each shift

D.Only after weather events such as rain or high wind

Explanation: OSHA 1926.451(f)(3) requires the competent person to inspect scaffolding and scaffold components before each work shift and after any occurrence that could affect structural integrity. This includes storms, accidental impacts, overloading, or any similar event.

3A frame scaffold base plate is found resting directly on frozen ground with no mudsill. What should the competent person do?

A.Allow work to continue because frozen ground is temporarily solid

B.Tag the scaffold as out of service and require mudsills to be installed before use

C.Add a second base plate under the first as a substitute for a mudsill

D.Reduce the scaffold load to light-duty classification and continue

Explanation: OSHA 1926.451(c)(2) requires scaffold footings to be sound, rigid, and capable of carrying the maximum intended load without settling or displacement. Frozen ground thaws unpredictably. The competent person must prohibit use and require proper mudsills before the scaffold is loaded.

4What minimum width must a scaffold platform be according to OSHA 29 CFR 1926.451(b)(2)?

A.12 inches

B.14 inches

C.18 inches

D.24 inches

Explanation: OSHA 1926.451(b)(2) requires scaffold platforms and walkways to be at least 18 inches wide. Where the work or use of the scaffold prevents an 18-inch width, the platform must be as wide as feasible and fall protection and falling-object protection must be provided.

5OSHA limits the gap between scaffold planks or between a plank and the structure to a maximum of:

A.½ inch

B.1 inch

C.1½ inches

D.2 inches

Explanation: OSHA 1926.451(b)(1) limits the space between planks or between a plank and a guardrail or upright to no more than 1 inch, except where the employer can demonstrate that a wider gap is necessary. Larger gaps create trip hazards and risk of tools or debris falling through.

6When using 2×10 nominal lumber planks on a frame scaffold, what minimum overlap is required at each end according to OSHA?

A.4 inches

B.6 inches

C.8 inches

D.10 inches

Explanation: OSHA 1926.451(b)(7) requires solid sawn wood planks to overlap each support by at least 6 inches. This prevents planks from tipping or sliding off the bearer when workers step near the ends.

7The top rail of a scaffold guardrail system must be installed at a height of:

A.36 to 42 inches above the platform surface

B.38 to 45 inches above the platform surface

C.42 to 48 inches above the platform surface

D.36 inches minimum with no maximum specified

Explanation: OSHA 1926.451(g)(4)(ii) requires the top rail of a scaffold guardrail to be installed between 38 and 45 inches above the platform surface. This range accommodates ergonomic variation while ensuring adequate fall protection height.

8At what working height does OSHA require fall protection for employees on a scaffold in the construction industry?

A.4 feet or more above a lower level

B.6 feet or more above a lower level

C.8 feet or more above a lower level

D.10 feet or more above a lower level

Explanation: OSHA 1926.451(g)(1) requires fall protection for employees on scaffolds at heights of 10 feet or more above a lower level. This differs from the 6-foot general construction fall protection trigger that applies to walking and working surfaces.

9A toeboard on a frame scaffold must be at least how tall according to OSHA 29 CFR 1926.451(h)?

A.2 inches

B.3.5 inches

C.4 inches

D.6 inches

Explanation: OSHA 1926.451(h)(1) requires toeboards to be at least 3½ inches high (nominal) to prevent tools, materials, and debris from rolling or sliding off the platform edge onto workers below.

10What is the load-bearing capacity per square foot for a medium-duty frame scaffold under OSHA 29 CFR 1926.452?

A.25 pounds per square foot

B.50 pounds per square foot

C.75 pounds per square foot

D.100 pounds per square foot

Explanation: OSHA 1926.452(c) establishes three duty classes for frame scaffolds: light-duty at 25 psf, medium-duty at 50 psf, and heavy-duty at 75 psf. Medium-duty is appropriate for typical masonry and general construction work with moderate material loads.

About the SAIA CP Frame Exam

The SAIA Competent Person — Frame Scaffolds credential trains and certifies workers to identify hazards, perform pre-shift inspections, and enforce OSHA 1926 Subpart L and ANSI A10.8 requirements for fabricated frame scaffold erection, use, and dismantling.

Questions

60 scored questions

Time Limit

Varies by delivery format

Passing Score

70%

Exam Fee

Contact SAIA at saiaonline.org (Scaffold & Access Industry Association (SAIA))

SAIA CP Frame Exam Content Outline

25%

Competent Person Duties & OSHA Definitions

Definition of competent person (1926.32(f)), inspection frequency, worker training (1926.454), authority to stop work, and ANSI A10.8 relationship to OSHA minimums

20%

Foundation, Footings & Screw Jacks

Base plates, mudsills, sole boards, screw jack extension limits (18 in max), sound footings, and sloped-surface leveling

20%

Platform, Planking & Load Ratings

18-inch minimum width, 1-inch max gap, 6-inch overlap, plank grading, light/medium/heavy duty classifications (25/50/75 psf), and eccentric loading hazards

20%

Guardrails, Fall Protection & Toeboards

Top rail 38-45 in, mid-rail at midpoint, toeboard 3.5 in min, PFAS requirement at 10 ft, 200-lb guardrail test load, and overhead protection

15%

Ties, Bracing, Erection & Dismantling

4:1 height-to-base ratio, tie intervals (26 ft vertical, 20-30 ft horizontal), cross-brace seating, safe erection sequence, top-down dismantling, and electrical clearances

How to Pass the SAIA CP Frame Exam

What You Need to Know

Passing score: 70%
Exam length: 60 questions
Time limit: Varies by delivery format
Exam fee: Contact SAIA at saiaonline.org

Keys to Passing

Complete 500+ practice questions
Score 80%+ consistently before scheduling
Focus on highest-weighted sections
Use our AI tutor for tough concepts

SAIA CP Frame Study Tips from Top Performers

1Memorize the three duty-class load ratings (25/50/75 psf) and which trade activities correspond to each class — these appear frequently on SAIA assessments

2Know the guardrail height range (38-45 in for top rail, approximately midpoint for mid-rail) and the 200-pound guardrail load test requirement

3Understand the 4:1 height-to-base ratio rule and be able to calculate the maximum unsupported height for any given base width

4Learn the screw jack 18-inch maximum extension limit and the reason behind it: buckling under compressive load

5Practice recognizing conditions that require removing the scaffold from service: bent frames, missing coupling pins, absent ties, cracked hardware

6Know the difference between a competent person (hazard identification + authority) and a qualified person (recognized expertise for design/analysis)

Frequently Asked Questions

What OSHA standard covers frame scaffolds?

Frame scaffolds in construction are covered under OSHA 29 CFR 1926 Subpart L (sections 1926.450 through 1926.454). Section 1926.451 contains general scaffold requirements, 1926.452(c) contains additional requirements specific to fabricated frame scaffolds, and 1926.454 covers training requirements.

How often must a frame scaffold be inspected?

OSHA 1926.451(f)(3) requires the competent person to inspect scaffolding before each work shift and after any occurrence that could affect structural integrity, such as storms, accidental impacts, or overloading events.

What is the 4:1 height-to-base ratio rule for frame scaffolds?

OSHA 1926.452(c)(5) requires frame scaffolds to be restrained from tipping by ties, guys, or braces when the scaffold height exceeds four times the minimum base dimension. For example, a scaffold with a 5-foot base must be tied or guyed before it exceeds 20 feet in height.

At what height is fall protection required on a frame scaffold?

OSHA 1926.451(g)(1) requires fall protection for employees on scaffolds at heights of 10 feet or more above a lower level. This is different from the 6-foot trigger for general construction walking-working surfaces.

What is the maximum screw jack extension allowed on a frame scaffold?

OSHA 1926.452(c)(6) limits the exposed, unbraced length of a screw jack to 18 inches. Greater extension reduces the jack's resistance to buckling under compressive load.

What are the three frame scaffold duty classifications?

OSHA 1926.452(c) establishes light-duty at 25 psf (painting, light work), medium-duty at 50 psf (general construction), and heavy-duty at 75 psf (masonry with heavy material storage). The competent person must ensure the scaffold is not loaded beyond its rated class.

Who qualifies as a competent person for scaffold work under OSHA?

OSHA 1926.32(f) defines a competent person as someone capable of identifying existing and predictable hazards in working conditions and who has authority to take prompt corrective measures to eliminate them. The SAIA Competent Person — Frame Scaffolds course is specifically designed to develop and document these qualifications.