EN ISO 20345 Safety Footwear Standard —
How to Choose the ISO 20345 Tester
Providing suitable safety footwear to protect feet from workplace hazards is key to ensuring worker safety. If you design or manufacture footwear that needs to meet safety requirements in different parts of the world, you must comply with the ISO 20345 standard.
What is EN ISO 20345?
ISO 20345 is the international safety footwear standard. It specifies the minimum performance requirements for shoes designed to protect against workplace hazards.
ISO 20345 specifies basic and additional (optional) requirements for safety footwear used for general purpose. It includes, for example, mechanical risks, slip resistance, thermal risks, ergonomic behaviour.
Special risks are covered by complementary job-related standards, e.g. footwear for firefighters, electrical insulating footwear, footwear protecting against chain saw injuries, chemicals, molten metal splash, and protection for motor cycle riders.
Key highlights of ISO 20345:
Requires 200 joule impact-resistant toe cap
Includes slip resistance testing (SRA, SRB, SRC)
Safety levels such as SB, S1, S1P, S2 and S3
Covers features like antistatic properties, water resistance, and energy absorption
Common safety classes under ISO 20345:
After testing and certification, safety footwear manufacturers will mark EN ISO 20345 compliant products with the standard and CE mark. Products are labelled with a simple two- or three-letter code defining the basic safety characteristics, for example:
SB – Basic safety toe protection
S1 – Adds antistatic, closed heel, and energy absorption
S1P – Includes puncture resistance in dry conditions
S2 – Adds water absorption and water resistance
S3 – Built on S2, with cleated outsole and full outdoor protection
ISO 20345 footwear is commonly used in construction, logistics, agriculture, manufacturing, and heavy industry.
How to choose the right ISO 20345 tester
1. Clarify Required Test Items
| Test Item | Key Indicators | Typical Test Equipment |
| Toe Compression & Impact | Impact resistance (200 Joules); Static pressure (15kN) | Safety Footwear Impact & Compression Tester |
| Penetration Resistance | Minimum penetration force: 1100N | Footwear Penetration Resistance Tester |
| Slip Resistance | Friction coefficient between outsole and test surface | Footwear Slip Resistance Tester |
| Conductive / Antistatic Property | Resistance range: 100kΩ – 1000MΩ or 0.1MΩ – 100MΩ | Antistatic Resistance Tester |
| Heel Energy Absorption | Impact absorption capacity of heel area | Drop Weight Type Heel Energy Absorption Tester |
| Outsole Flex Resistance | Crack condition after repeated flexing | Outsole Flexing Tester |
| Abrasion Resistance | Outsole material abrasion loss | DIN Rotary Abrasion Tester |
| Hydrolysis / Aging Resistance | Performance change under temperature & humidity conditions | Constant Temperature & Humidity Chamber |
2. Evaluate the equipment
Standard compliance
The equipment must explicitly declare conformity to ISO 20345, while also considering compatibility with other relevant standards such as EN, ASTM, etc.
Accuracy and calibration
Force, displacement, time, temperature and other sensors should come with traceable calibration certificates. Prefer equipment with automatic calibration capability.
Important: The equipment manufacturer should be able to provide initial third-party calibration services or guidance.
Automation and data
Does it feature automatic control, data logging, and report generation? Support for Excel/PDF export facilitates analysis. Network connectivity is a plus.
Safety and compliance
Must include safety guards, emergency stop buttons, etc. Meet local electrical safety (e.g., CE) and electromagnetic compatibility certifications.
3. Suppliers
Select manufacturers with at least five years’ specialisation in safety footwear testing equipment, giving priority to brands that collaborate with SGS, BV and TÜV. Ensure they offer rapid response capabilities (24-hour technical support and 48-hour on-site service) to minimise production downtime. Can the supplier provide installation, training and guidance on testing methods? Do they provide standard operating procedure videos or detailed manuals?
GESTER’s Role in Safety Footwear Testing Equipment
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