Every numeric dimensional tolerance and safety factor in OSHA's scaffold general requirements (29 CFR 1926.451)

All of the specific numeric dimensional tolerances, clearances, safety factors, and spacing requirements stated in 29 CFR 1926.451 (General requirements for scaffolds), extracted from the eCFR text and tabulated so a scaffold erector or safety inspector can look up any measurement without reading the full 60,000-character regulation. Each record is one specific tolerance or requirement with its exact value in both imperial and metric units, the paragraph citation, and the condition or scaffold type it applies to. Answers 'what is the maximum gap between scaffold planks', 'how far can a scaffold plank overhang its support', 'what is the minimum platform width for a scaffold', 'at what height-to-base ratio must a scaffold be tied', 'what is the load safety factor for scaffold suspension ropes', 'what is the maximum distance from scaffold platform to work face for plastering'. Scaffolding is among OSHA's top 10 most cited standards every year (6th in FY 2025) and the numeric values are scattered across paragraphs (a) through (h) of a long regulation -- a tabulation that puts them all in one place with their paragraph citations is genuinely useful and does not exist as a structured page anywhere found.

The data

Where this came from

Every record above links the page it was taken from and quotes the sentence that states it. These are the 1 source this dataset was assembled from.

• ecfr.govhttps://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1926/subpart-L/section-1926.451

Machine-readable

• data.jsonThe whole dataset — every record with its source URL and source quote.
• Open Knowledge Format bundleOne JSON object per line — every record's frontmatter and quoted span exactly as it is held here, in one fetch.
• data.csvThe same records as one flat table, for a spreadsheet or a dataframe. The last four columns are the source URL, the quoted sentence it was read from, the date we last checked it, and which columns are our reading rather than the page's words.
• How this is made and checkedWhat "verified against source" does and does not mean.

From your own code

Same records, same quotes, without scraping the page: refsource is on PyPI and npm. Each value comes back carrying the URL it was read from and the sentence on that page that states it — .source and .quote sit on the value itself rather than in a side channel, so the checking step is available instead of skipped.

pip install refsource
refsource lookup osha-scaffold-dimensional-tolerances requirement_id=access-required-trigger-height

npx -y refsource lookup osha-scaffold-dimensional-tolerances requirement_id=access-required-trigger-height

Set your AI assistant up to use this

Two files and no account. Put this in .mcp.json at the root of your project — Claude Code, Cursor, Windsurf, VS Code and Codex all read that file — and your assistant can look this dataset up instead of recalling it. The server is remote, keyless and read-only.

{
  "mcpServers": {
    "referencesource": {
      "type": "http",
      "url": "https://referencesource.org/mcp"
    }
  }
}

Add to Cursor · or, on the command line: claude mcp add --transport http referencesource https://referencesource.org/mcp --scope project

Then one line in the project's CLAUDE.md or AGENTS.md, so the assistant knows when to reach for it:

When a question needs "Every numeric dimensional tolerance and safety factor in OSHA's scaffold general requirements (29 CFR 1926.451)", call the referencesource MCP server at https://referencesource.org/mcp (tool `search_records`, dataset_slug `osha-scaffold-dimensional-tolerances`) instead of answering from memory — every record it returns carries its source URL and a verbatim quote from that page.

What each tool does, and the servers built over single registers: Connect your AI assistant.

91 records. last verified against source 2026-09-14. due for re-check by 2027-09-01.

Licence. US federal regulation -- 17 USC 105, no copyright.