1926.1101(c)(1): Time-weighted average limit (TWA)
Key takeaways
- 1926.1101(c)(1) is part of OSHA's construction standards (29 CFR Part 1926, Subpart Z).
- OSHA cited it 4 times in the last 3 years, in 4 inspections, with $8,064 in current penalties.
- Related part: 1926.1101(c) Permissible exposure limits (PELS) (8 citations).
- Free 5-minute toolbox talk for your crew below.
Get the free 5-minute toolbox talk on 1926.1101(c)(1) ↓
In this article
What this rule covers
29 CFR 1926.1101(c)(1) ("Time-weighted average limit (TWA)") is one requirement inside 1926.1101 Asbestos, an OSHA construction standard (Part 1926, Subpart Z). 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
(1) Time-weighted average limit (TWA). The employer shall ensure that no employee is exposed to an airborne concentration of asbestos in excess of 0.1 fiber per cubic centimeter of air as an eight (8) hour time-weighted average (TWA), as determined by the method prescribed in appendix A to this section, or by an equivalent method. 4 citations
Source: eCFR, text current as of 2026-10-15. Read all of 1926.1101.
Export the list: 4 inspections cited 1926.1101(c)(1) in the last 3 years, with employer, location, penalty and date.
Purple Belt, $59/moWhere and how often it was cited
Free toolbox talk
A 5-minute crew talk on 1926.1101(c)(1), plus alerts when this rule changes. Free.
OSHA interpretation letters
None exist. OSHA has not published a letter of interpretation for 1926.1101(c)(1).
Related parts of this rule
- 1926.1101(c) Permissible exposure limits (PELS) 8 citations
Get your crew competent
Trainers on Black Belt Safety: Marc Harvey
Trainers and suppliers: feature your business on this rule for $25/month.
About this page
Sources
- 29 CFR 1926.1101 (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 2026-11-06
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.