What Is ASTM F2413?
ASTM F2413 is the primary American standard governing the performance requirements for protective footwear. Published by ASTM International, it defines the minimum levels of protection a boot must provide to carry specific safety designations. The most recent major revision is ASTM F2413-18, released in 2018.
When you see a label inside a work boot listing codes like "I/75 C/75 EH PR," that label is the boot's compliance certification. Understanding what each code means helps you verify that the boot matches the hazards in your workplace.
How to Read the ASTM Label
A compliant boot's label will typically read something like:
ASTM F2413-18 M I/75 C/75 EH
Here's how to decode each part:
- F2413-18: The standard name and year of the revision.
- M or W: Men's or Women's sizing last was used in testing.
- I/75: Impact resistance — the toe cap withstands a 75 ft-lb impact.
- C/75: Compression resistance — the toe cap withstands 2,500 lbs of compressive force.
- EH: Electrical Hazard — the sole resists up to 18,000 volts under dry conditions.
Full Breakdown of All ASTM Designations
| Code | What It Means | Who Needs It |
|---|---|---|
| I/75 | Impact resistance (75 ft-lb) | Anyone around falling objects |
| C/75 | Compression resistance (2,500 lbs) | Anyone around heavy rolling equipment |
| EH | Electrical hazard (secondary protection) | Electricians, utility workers |
| PR | Puncture resistance in midsole | Construction, roofing, demolition |
| MT | Metatarsal guard protection | Foundry, heavy manufacturing |
| SD | Static dissipative (reduces static buildup) | Electronics manufacturing, clean rooms |
| CD | Conductive (rapidly dissipates static) | Explosive environments (specific use only) |
| CSA | Canadian Standards Association rating | Workers in Canada |
Impact vs. Compression: What's the Difference?
Impact resistance (I) tests what happens when a heavy object falls and strikes the toe from above — like a dropped tool or a piece of lumber falling off a stack. The toe cap absorbs the blow and maintains enough clearance that your toes are not crushed.
Compression resistance (C) tests what happens when the boot is slowly compressed from above — like a heavy cart rolling over your foot. The toe cap must hold its shape and maintain clearance under 2,500 lbs of static force.
Both tests are typically performed together, which is why you see them listed as I/75 C/75 as a pair.
What About OSHA Requirements?
OSHA's general industry standard (29 CFR 1910.136) and construction standard (29 CFR 1926.96) require employers to ensure workers wear protective footwear in areas where foot injuries are possible from falling or rolling objects, sharp objects, or electrical hazards. OSHA references ASTM F2413 as the accepted compliance standard. However, OSHA does not specify which designations are required — your employer is responsible for conducting a hazard assessment and determining which certifications are needed for your specific role.
Is ASTM F2413 the Only Standard?
No. There are several other standards worth knowing:
- ANSI Z41 — the predecessor to ASTM F2413, now retired but still referenced on older boots.
- CSA Z195 — the Canadian equivalent standard for protective footwear.
- EN ISO 20345 — the European standard (SB, S1, S2, S3 ratings) used internationally.
If you work across borders or for multinational companies, you may encounter these designations. Always check which standard your employer or job site requires.
Bottom Line
The ASTM label inside a boot is more than a sticker — it's a guarantee that the footwear has passed standardized testing for the hazards it claims to protect against. Before buying any safety footwear, confirm which designations your job demands, and verify the label matches.