![]() The equivalent of a K12: 元 rating would be an M50: P1 rating. You’ll notice M-ratings accommodate for farther distances than K-ratings, which can make for a more accurate measure. P4 rating: A vehicle traveled farther than 98.4 feet.P3 rating: A vehicle traveled between 23.1 and 98.4 feet.P2 rating: A vehicle traveled between 3.31 and 23 feet.P1 rating: A vehicle traveled 3.3 feet or less.M-ratings are also divided into P1, P2, P3 and P4 classifications, based on how far the vehicle traveled beyond the barrier: M-ratings and K-ratings are similar enough to be interchangeable. The vehicles in these tests traveled at 30, 40 and 50 miles per hour, in that order. A K4 and M30 rating are equivalent, a K8 rating matches M40, and a K12 rating matches M50. You can match K-rated and M-rated tests based on speed. M-ratings are similar to K-ratings in that their numeral designations correspond with test vehicle speeds. Like K-ratings, M-ratings are based on vehicle size, speed and travel distance. ASTM crash ratings are different because they’re based on how far a vehicle’s payload travels beyond a barrier, rather than its front. M-ratings have replaced K-ratings in recent years, using standards from the American Society for Testing and Materials (ASTM). When interpreting K-ratings, use the “K” number to determine the test vehicle’s speed and the “L” number to determine how far it traveled beyond the barrier. The strongest barrier, in terms of K-ratings, would be K12: 元 - in this case, a 15,000-pound vehicle moving at 50 miles per hour penetrated the barrier less than 3 feet. L1 rating: The vehicle traveled beyond the barrier between 20 and 50 feet.L2 rating: The vehicle traveled beyond the barrier between 3 and 20 feet.元 rating: The vehicle traveled beyond the barrier less than 3 feet.K-ratings are further divided into L1, L2 and 元, based on how far the front of the vehicle traveled beyond the barrier. K12 crash ratings: These ratings apply to a test at 50 miles per hour.K8 crash ratings: This test speed is 40 miles per hour.K4 crash ratings: These represent tests at 30 miles per hour.Specific K-ratings on the DOD anti-ram vehicle barrier list include: Increasing K-ratings represent tests at higher speeds, with the same size and type of vehicle. ![]() When it comes to K-ratings, only vehicles that travel 50 feet or less beyond the barrier earn certification. Department of Defense ratings are based on how far a 15,000-pound vehicle travels past a barrier at a given speed. The Department of Defense (DOD) crash ratings, also known as K-ratings, have been around since 1985. You might find crash ratings in terms of K-ratings or M-ratings, so it’s important to know the difference. Together, these three factors make up the classification for a barrier’s crash rating. Some rating systems only award certification up to a certain number of feet beyond the barrier - anything beyond has not earned certification. The distance the vehicle travels beyond the barrier.The speed at which the vehicle is traveling. ![]() Three basic factors determine crash test ratings: The 3 Factors That Determine Crash Ratings Learn about how to interpret crash ratings for gates and bollards. With these ratings, you can determine which barriers will hold up the best against rams and crashes. If you’re looking for a secure gate or barrier, pay attention to crash ratings. crash ratings determine the durability of such security gates. Security measures involving gates and barriers are vital to modern industry and defense. ![]() They minimize both unauthorized access and property damage during an accidental crash. The 3 Determining Factors | K-Ratings | M-Ratings | Tested vs Certified vs Engineered | ASTM Models and Codesīollards and security gates keep entrances secure.
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