Acknowledgements
With thanks to the work this site builds on
Sign designs and references
- The U.S. Occupational Safety and Health Administration’s 29 CFR 1910.145, Specifications for Accident Prevention Signs and Tags, the source for what each kind of sign is for and how it’s colored — red, black and white for danger, yellow for caution, green-and-white for safety instructions, fluorescent orange-red for biological hazards.
- The biological hazard symbol, designed by Charles Baldwin and Robert Runkle at Dow Chemical in 1966 and released to the public domain — the design 1910.145(f)(8)(ii) prescribes. Ours is built from its published construction, cross-checked against the public-domain drawing on Wikimedia Commons.
- The nine Hazard Communication Standard pictograms of 29 CFR 1910.1200 Appendix C — the United Nations GHS pictograms, which OSHA adopts — embedded from the public-domain drawings on Wikimedia Commons and checked against OSHA’s QuickCard 3491. Each is always drawn whole, as Appendix C.2.3.1 requires: a black symbol on a white field inside a red diamond frame.
- The sign-maker conventions OSHA leaves open, like the orange WARNING and blue NOTICE headers, which follow common industry practice. This site doesn’t reproduce the ANSI Z535 standards.
Lettering
Every sign is set in Tuffy Bold, a public-domain typeface by Thatcher Ulrich, chosen for its full Latin coverage — so bilingual English / Spanish signs get every accent (PRECAUCIÓN, RIESGO BIOLÓGICO).
Weathered and rusty finishes
The idea for offering signs in different states of wear — a clean, brand-new sign by default, or a weathered or rusty one — came from the US Road Sign Generator on Superhive Market, whose clean, weathered and rusty material options inspired the Weathering and Rust sliders in our sign builder. Our version is drawn independently, as procedural SVG filters, so every finished sign is still a single vector file. Thank you for the idea.
Sister sites
Safety-Signs.work shares its sign engine with Road-Signs.work and Trail-Signs.work, listed with the rest of the family at the bottom of every page. See what’s new in the changelog.