Binding law or regulation
A requirement issued by an authority with jurisdiction. We identify the jurisdiction, provision, and review date rather than calling every best practice “required.”
Safety & source standard
Authority requires scope, dates, and the humility to stop.
We aim to be accurate and useful on topics we publish, while recognizing that laws, standards, interpretations, recalls, and product instructions move. The site is education—not a compliance determination or equipment approval.
The operating rule
State what kind of claim it is.
“Required,” “certified,” “recommended,” and “common practice” are not interchangeable. Each consequential page should give the intended audience, jurisdiction, source edition, checked date, reviewer, and exclusions needed to understand a claim.
Adopted or consensus standard
A technical standard may be voluntary, contractual, incorporated by reference, or adopted by an authority. Its legal role must be stated, not assumed.
Manufacturer instruction
The exact product and compatible system documentation can be controlling for safe use even when a broader article describes the category correctly.
Interpretation or guidance
Agency letters and guidance can explain existing requirements without creating a new rule. They can also be revised or withdrawn.
Editorial judgment
Our synthesis, shortlist, or practical suggestion. It stays visibly separate from a legal requirement or product certification.
Commercial relationship
A future commission or supplied sample is disclosed near the recommendation and never changes a safety gate or source label.
The high-risk boundary
The generic chooser and calculator do not select or approve equipment for climbing, fall arrest, rescue, human suspension, overhead lifting, or regulated rigging. Those uses require purpose-rated equipment, current manufacturer documentation, complete-system compatibility, the applicable rules and standards, training, inspection, and qualified oversight appropriate to the work.
A number such as 5,000 lbf appears in particular regulatory component and anchorage criteria. It is not a universal “safe rope” rule and cannot validate an arbitrary rope, knot, connector, anchor, or mixed system.
A moving-source protocol
- Prefer the current primary source and record the URL, jurisdiction, edition or effective date, and access date.
- Use a qualified subject reviewer for climbing, fall protection, rope access, rescue, lifting, and other high-consequence topics.
- Check Tier 2 life-safety and regulated pages quarterly and whenever an authority, standards body, manufacturer, or recall notice changes.
- Mark a page under review—or remove a questionable recommendation—rather than leaving potentially stale guidance looking current.
- Publish meaningful corrections and change dates only when the substance changes.
What a page must clear before it publishes sets out what each tier asks of a person rather than of a document, including which of those roles is still unfilled.
Starting primary sources
These are starting points, not a complete map of every activity, jurisdiction, state plan, adopted standard, or product instruction.
- OSHA fall protection overviewFederal safety guidance (opens in a new tab)
- 29 CFR 1910.140 - Personal fall protection systemsCurrent electronic regulation (opens in a new tab)
- 29 CFR 1926.502 - Fall protection systems criteriaConstruction regulation (opens in a new tab)
- UIAA Safety StandardsClimbing equipment standards (opens in a new tab)
Interim educational-use notice
Understanding Cordage provides general educational information, not legal, engineering, compliance, certification, professional-safety, or hands-on training advice. Cordage and related systems can fail and cause serious injury, death, or property damage. Content is researched from sources believed current on the displayed review date, but laws, standards, recalls, product instructions, and site conditions change.
Do not use this site or its calculators to design, approve, certify, or select a life-safety or regulated workplace system. Verify current requirements, product status, compatibility, condition, and suitability with the responsible authority, manufacturer, employer, and an appropriately qualified or competent professional. A full legal disclaimer should be prepared with counsel before commercialization.
Report a correction or source that needs review.
Who is accountable for this standard names the editorial roles behind it and marks the ones still unfilled. The privacy note covers the separate question of what this site stores and sends.