1926.451(g)(4)(ii): Scaffold Toprail Height
Employers must install toprails on supported scaffolds made or placed in service after January 1, 2000 between 38 inches (0.97 m) and 45 inches (1.2 m) above the platform. Older supported scaffolds, and suspended scaffolds needing both guardrail and fall arrest, must be between 36 inches (0.9 m) and 45 inches (1.2 m). The top edge may exceed 45 inches when conditions warrant, if all other guardrail criteria are met.
Key takeaways
- 1926.451(g)(4)(ii) is part of OSHA's construction standards (29 CFR Part 1926, Subpart L).
- OSHA cited it 15 times in the last 3 years, in 15 inspections, with $34,479 in current penalties.
- 2 deaths are linked to inspections that cited this rule.
- Most citations: VA (3), PA (2), NY (2).
- Related part: 1926.451(g) Fall protection (2,806 citations).
- Free 5-minute toolbox talk for your crew below.
In this article
What this rule covers
29 CFR 1926.451(g)(4)(ii) is one requirement inside 1926.451 General requirements, an OSHA construction standard (Part 1926, Subpart L). The official text below is copied word for word from the Electronic Code of Federal Regulations (eCFR). The numbers, injury cases and training on this page show how OSHA enforces it on real job sites.
Official text
(ii) The top edge height of toprails or equivalent member on supported scaffolds manufactured or placed in service after January 1, 2000 shall be installed between 38 inches (0.97 m) and 45 inches (1.2 m) above the platform surface. The top edge height on supported scaffolds manufactured and placed in service before January 1, 2000, and on all suspended scaffolds where both a guardrail and a personal fall arrest system are required shall be between 36 inches (0.9 m) and 45 inches (1.2 m). When conditions warrant, the height of the top edge may exceed the 45-inch height, provided the guardrail system meets all other criteria of paragraph (g)(4). 15 citations
Source: eCFR, text current as of 2026-10-15. Read all of 1926.451.
Injuries linked to this rule
2 deaths are linked to inspections where OSHA cited 1926.451(g)(4)(ii).
At 9:00 a.m. on March 22, 2024, Employee #1 had been tuckpointing a residential building for approximately 4 weeks. Employee #1 was preparing the site and beginning work. Employee #1 climbed the scaffold/roof. Employee #1 fell from thescaffold/roof. Employee #1 was unconscious and sustained a…
Full case list with employer, penalty, filters and download is part of OSHA Data (Purple Belt).
Unlock with Purple BeltWhere and how often it was cited
| Year | Citations |
|---|---|
| 2024 | 5 |
| 2025 | 5 |
| 2026 | 5 |
Top states: VA (3), PA (2), NY (2), SD (1), TX (1)
Largest penalties
| Employer | Location | Penalty for this rule |
|---|---|---|
| MASONOMICS, INC. | RICHMOND, VA | $8,145 |
| SPECTRUM ENVIRONMENTAL, LLC | PITTSBURGH, PA | $6,511 |
| DAVID KEVIN TINSLEY | PORT ARANSAS, TX | $4,839 |
| JOHN CORTESE MASON CONTRACTORS INC | MORRISTOWN, NJ | $3,641 |
| MASONS OF FREDERICKSBURG LLC | RICHMOND, VA | $3,255 |
Free toolbox talk
A 5-minute crew talk on 1926.451(g)(4)(ii), plus alerts when this rule changes. Free.
OSHA interpretation letters
- Fall protection requirements for employees working from a "work bridge" in concrete construction work (2002-12-09)
- Meaning of January 1, 2000 "placed in service" date for scaffolds. (2000-05-25)
- Scaffolds placed in service after January 1,2000 must meet new rail height requirements. (2000-05-18)
Related parts of this rule
- 1926.451(g) Fall protection 2,806 citations
- 1926.451(g)(1) 2,210 citations
- 1926.451(g)(1)(vii) 671 citations
- 1926.451(g)(4) 516 citations
- 1926.451(g)(4)(i) 392 citations
- 1926.451(g)(1)(i) 149 citations
- 1926.451(g)(1)(vi) 65 citations
- 1926.451(g)(2) 46 citations
- 1926.451(g)(3) 33 citations
- 1926.451(g)(4)(iv) 32 citations
- 1926.451(g)(4)(iii) 21 citations
- 1926.451(g)(3)(i) 20 citations
Get your crew competent
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Frequently asked questions
How high must a toprail be on a newer supported scaffold?
Between 38 inches (0.97 m) and 45 inches (1.2 m) above the platform surface, for scaffolds manufactured or placed in service after January 1, 2000.
What about older scaffolds?
Between 36 inches (0.9 m) and 45 inches (1.2 m) for supported scaffolds manufactured and placed in service before January 1, 2000.
Can a toprail be higher than 45 inches?
Yes, when conditions warrant, if the guardrail system meets all other criteria of paragraph (g)(4).
About this page
Sources
- 29 CFR 1926.451 (eCFR), text current as of 2026-10-15
- U.S. Department of Labor enforcement data: OSHA inspections, citations and accident records, copied nightly; data as of 2026-10-20
3-year window. Federal OSHA only; state-plan rules are not counted. Plain-language text is a summary, not legal advice; the official text controls. Black Belt Safety is not part of OSHA or the Department of Labor.