ASTM crash ratings appear on almost every security bollard spec sheet, yet almost none explain the code. If you have compared products lately, you have seen M30, M40 and M50 on the datasheet. In short, each code records how that bollard behaved in a standardized vehicle impact test.
To begin with, the letter M stands for medium-duty truck. The number beside it is the impact speed in miles per hour. So an M30 bollard faces a 15,000-pound truck at 30 mph, while M40 and M50 send it in faster.
It sounds simple. In practice, though, the M number alone will not tell you whether a bollard suits your site. This guide from Bullard Bollards decodes ASTM crash ratings for a storefront, a parking lot or a power station. By the end, you will know which number your site needs, and which questions to ask first.
Every M-rating under ASTM F2656/F2656M-20 uses the same test vehicle: a 15,000-pound (6,800 kg) medium-duty truck. Only the speed changes. Therefore the number after the M tells you the exact speed that barrier survived on the test track. That number is only trustworthy when an independent lab produced it, which is the distinction our guide to certified bollards versus engineered-to-meet claims draws out.
For example, think of it as a video game. The truck is the boss, and the speed sets the difficulty. An M30 bollard beats that boss at 30 mph, while an M50 bollard beats the same boss charging at 50 mph.
The table below sets the three ASTM crash ratings side by side.
| Rating | Test vehicle weight | Impact speed | Typical real-world setting |
|---|---|---|---|
| M30 | 15,000 lbs | 30 mph | Storefronts, plazas and parking lots |
| M40 | 15,000 lbs | 40 mph | Access roads, utilities and data centers |
| M50 | 15,000 lbs | 50 mph | Highway-speed approaches and federal sites |
Here is the part most spec sheets skip. Impact energy climbs with the square of the speed, so an M50 hit carries roughly three times the energy of an M30 hit. As a result, the steel, the anchors and the concrete all change as you move up the scale.
M-ratings cover medium-duty trucks. However, ASTM crash ratings also describe three other vehicle classes:
Always check the letter before you compare numbers. A C60 and an M30 sound similar, yet they describe very different threats.
The M number gives you the speed. But what happens in the seconds after impact? That is the P rating, and it records how far the vehicle traveled past the barrier during the test. In other words, ASTM crash ratings pair a speed with a distance.
Ask for P1 whenever people or glass sit close behind the barrier. If a manufacturer quotes “M50 rated” and hides the P value, treat that as a warning sign. Usually it means the truck reached P2 or P3, which is another way of saying it kept going.
Crash tests run under controlled conditions: flat ground, a square head-on hit and one specific truck design. Real sites rarely cooperate that neatly. Specifically, three variables break the lab assumption more often than any others.
In the lab, the truck hits dead center. On a real driveway, a vehicle may clip the bollard at 30 degrees instead, and that changes the physics entirely. A glancing blow can redirect a vehicle rather than stop it. The rating still gives you the best benchmark available, though it cannot model every approach. Controlling the approach itself is a separate discipline, covered in our guide to hostile vehicle mitigation for high-threat sites.
An M rating tests a medium-duty truck, not a heavy-duty pickup and certainly not a loaded cement mixer. For example, an M30 bollard handles a standard sedan easily. A heavier vehicle, however, brings a completely different level of force at the very same speed.
M30 covers 30 mph. If a driver can reach 60 mph before your building, therefore, an M30 system will not deliver the protection you assumed. In that case you need a higher rating, more standoff distance, or both.
This is why vehicle impact ratings work as a starting point rather than an endpoint. Measure the real runway a vehicle has first, then pick the rating. Our specifier’s guide to ASTM F2656 and F3016 walks through that assessment in more depth.
Choosing between ASTM crash ratings is a risk decision rather than a shopping decision. You are not buying a bollard. Instead, you are buying the balance between what you protect and what could hit it. If a crash rating turns out to be more protection than the site needs, our comparison of impact-resistant barriers and crash-rated bollards sets out the lighter options.
Asset value + threat level + approach speed = required protection level
Run your site through these five questions.
| # | Question | What to look for |
|---|---|---|
| 1 | What is the maximum approach speed? | Measure the real run-up a vehicle has, rather than the posted limit. Could a driver realistically reach 50 mph? |
| 2 | What are you protecting? | Restaurants and playgrounds justify M30 as a floor. Server rooms and data centers point to M40 or M50. Meanwhile, critical infrastructure follows its own threat assessment. |
| 3 | How much standoff do you have? | A bollard beside a glass door needs P1. By comparison, a 50-foot buffer gives more room for error. |
| 4 | What sits under the ground? | High-security bollards need deep foundations, and some M50 systems want several feet. Therefore, pipes and fiber may rule that out. |
| 5 | What is the aesthetic goal? | In general, M50 units are thick steel cylinders. M30 units look far more decorative while still stopping a smash-and-grab attack. |
ASTM crash ratings assume a correctly built foundation underneath. Basically, the foundation is the concrete anchor holding the bollard down. You can specify the strongest bollard on the market, yet a weak anchor still lets a truck rip it straight out of the ground. Our guide to crash-rated bollard installation walks through the foundation work that keeps the certified rating intact.
Most engineering specs assume you can dig roughly 4 feet down and 3 feet wide. In a dense city center, however, that assumption often fails. Crews hit subway tunnels, gas lines, water mains and basement slabs instead.
Bullard Bollards specializes in shallow foundation high-security bollards. Rather than digging deep, we spread the load horizontally, much like a camera tripod that widens its legs instead of sinking them. Our range also covers illuminated security bollards and solar security bollards, so nighttime visibility arrives with the crash protection.
Modern engineering now reaches high ASTM crash ratings without excavating below 12 to 18 inches. If your building sits over a basement or a parking garage, this is usually the only workable option. Bullard’s Art 11 specification, for instance, includes an ASTM M30 crash-rated shallow bollard configuration. Our installation training program covers how that certification survives the pour.
You now know how ASTM crash ratings work and where they stop. Next comes the harder part: choosing a partner who can supply, certify and install the system properly.
At Bullard Bollards we do not guess. Instead, we test. Our products go through full-scale physical crash testing, and we hand over certified crash reports, CAD drawings and installation guidance. We also make sure the whole assembly — steel, rebar and concrete — works together.
Be careful of suppliers who sell a thick steel pipe and simply call it “impact-rated”. In contrast, certified protection arrives with paperwork and test video. Our range runs from M30 storefront units through to M50 federal-grade barriers, and our shallow foundation systems reach high ratings without deep excavation. In addition, you can browse the full line on our non-illuminated security bollard collection.
Don’t wait for a vehicle to prove your barrier was under-specified. Contact Bullard Bollards today and we will size the right system for your site.
Not necessarily. An M30 rating means the bollard passed a test with a 15,000-pound vehicle at 30 mph. However, it does not promise the same result for every vehicle at or above that speed.
No, although the two ratings are related. Previously, the K12 standard used a similar truck weight at 50 mph. M50 replaced it and sets tighter limits on penetration and debris, so it is the tougher benchmark.
Higher ratings usually demand deeper concrete. Our M50 bollards sit in shallow foundations instead, which helps on sites where deep excavation is impractical, such as locations with basements, underground structures or high water tables.
Yes. Notably, a certified bollard has passed a physical crash test with video proof. An engineered bollard rests on calculations instead. Bullard Bollards supplies the test video, because theory alone does not stop a truck.
Usually not. If cars in your parking lot move at 10 to 15 mph, an M30 system often gives adequate protection. Ultimately, your own risk profile and approach speeds decide the final answer.
