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Understanding Grip Ratings for Non Slip Footwear

Last Updated: November 30, 2023

By Rehan Iqbal   

Without a universal standard for most workplaces, employees and workers must determine the proper slip-resistant shoe that will suit their work environment entirely. This is virtually one very impossible task for the average employee who just wants something comfortable. The truth is that many different types of shoes are rated as non slip, skid resistant or slip resistant.

Slipping Warning Sign

However, they do not often give enough protection for professions such as nurses, doctors, chefs, factory workers and other occupations that require negotiating a slippery floor. Today, the only reliable way to make an informed purchasing decision on which no slip shoes to wear is to look at the slip resistance standards and grip ratings.

This is all thanks to the health and Safety Labs who developed the GRIP rating scheme for the slip resistance of footwear. The main aim of this grip scheme is to allow you as the user to identify the best slip resistant footwear as a control measure to reduce the hazards and risks of slips and falls. If you’re in the market for a great pair of slip resistant shoes, then here’s a guide on understanding grip ratings for non-slip footwear.

Types of Grip Ratings for Non Slip Footwear

For most shoes, the safety features involving slip resistance are tested according to a set of test standards written into clauses like EN ISO 20344 as well as certain ASTM safety criteria in the US. These slip tests are carried out on a testing rig in a lab under controlled conditions using a broad range of surfaces like floors.

Similarly, some brands also use star systems that are informed by a risk assessment of the workplace. For low hazard environments, one or two-star ratings on non-slip shoes comes highly recommended. However, only three, four and five star ratings will do for high-risk areas that are prone to slips. But generally, the most popular grip ratings for non slip footwear includes the following:

ASTM Slip Resistance Standards for Shoes

OSHA (Occupational Safety & Health Administration) has a historical account of requiring slip-resistant shoes. The capability of slip resistance depends on the surfaces you walk on while at work.

Keep in mind, however, that the way shoes react when walking on a dry floor differs from how they would react on a wet floor. Just because footwear has “non-slip” treads on the bottom of them, that doesn’t mean they will hold you up when you’re walking on a wet floor.

Sometimes, when you’re walking too fast, you’re going to slip no matter what. That’s the danger of trying to finish work in a rush.

For example, you can’t possibly think that any slip-resistant shoe will sustain you if running across a polished or waxed concrete or linoleum floor. It’s tough enough to walk on when dry, let alone if you spill a bucket of water all over it.

Of course, that’s also why you need to have your “wet floor” signs in position. This includes when you are mopping or if you have a spill you need to wipe up.

You should follow the standards set by your employer and OSHA for slip resistance. However, having slip-resistance footwear doesn’t take away the need for common sense.


Examples of Slip Resistance Ratings

ASTM F1677
ASTM F2913
ASTM F3445-21
ASTM D471-16a

Other Slip Rating Classifications

SRA

If your shoes or work boots have been rated as SRA for slip resistance, then this means a few things for you. For starters, it means that your boots will be much more affordable than all the other ratings. However, it also means less of a grip on certain surfaces. An SRA rating means that your shoes have been tested on a ceramic tile floor that has been wetted with a diluted soap solution. For those of you who have ever cleaned a tiled floor with soap (basically all cleaners), then you know exactly how slippery things can get. An SRA rating guarantees that you won’t have to end up on the ground as a human mop.

SRB

Another rating that might not make your shoes as expensive as the next one is the SRB. Basically, an SRB rating means that that type of outsole has been tested on a smooth steel floor that has been coated with glycerol. While not many of you with have had the pleasure of experiencing smooth steel on glycerol, just imagine stepping on wood floors with lots of lotion on it. It’s safe to say that it makes for a more slippery surface than just tiles and soap. However, an SRB grip rating guarantees that you keep your footing even if you were crossing a river of glycerol.

SRC

This is by far the strongest and most reliable rating for any type of non slip footwear in the market. For a shoe to be rated SRC, it has to pass the diluted soap on ceramic test as well as the glycerol on smooth steel test. This means that an SRC rated shoe also meets all the requirements of SRA and SRB as well. However, it also means that shoes ranked SRC will have quite the steep price tag stapled on them. So if you would rather not compromise your safety just to save a few bucks, then the SRC rating is exactly what you need.

Final Word

It should be noted that while SRA, SRB and SRC grip ratings provide for a very reliable measure of slip resistance, the test surfaces used are not wholly representative of all underfoot surfaces in real workplaces. As such, it’s up to you to identify with your environment and understand which type of outsole will suit you best. Similarly, this grip scheme only deals with slip resistance in footwear. While slips and falls are a major issue, it’s important to consider other safety requirements such as such as toe protection, anti-bacterial features, and waterproof uppers, among others.

Author

  • Rehan Iqbal
    Rehan Iqbal

    Rehan is a content creator with a focus on plantar fasciitis and gait issues. His knowledge in this field is considerable and he has helped many people understand and overcome these conditions. In his free time, he enjoys outdoor activities like running and hiking.

    View all posts

Comments

  1. Ed Huerta says

    January 12, 2021 at 5:23 pm

    Thank you for taking the time. Very informative and useful.

    Reply

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