UL 555 · SWRI
For UL 555, nrtl is SWRI; standard title is Fire Dampers; laboratory is Southwest Research Institute; osha docket is OSHA-2006-0041; status is currently recognized, recorded from its source on 2026-10-01; source re-checked 2026-11-10.
- Test standard
- UL 555 verified
- Standard title
- Fire Dampers verified
- NRTL
- SWRI
- Laboratory
- Southwest Research Institute
- OSHA docket
- OSHA-2006-0041 verified
- Status
- currently recognized our reading
Values marked our reading are our classification of what the source says — the source does not print them in those words. The quote below is the evidence for each one; judge it yourself.
What the source says
UL 555 | Fire Dampers |
— osha.gov, retrieved 2026-10-01
Where each value comes from
The value above is stated away from the sentence quoted with the answer, so the passage that states it is shown here too.
OSHA docket
Docket Number: OSHA-2006-0041
— all from osha.gov, retrieved 2026-10-01
Source
- osha.govhttps://www.osha.gov/nationally-recognized-testing-laboratory-program/swri