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drawoh, It is for maintaining a perimeter for defense against terrorists. Blast resistance of structural members are determined based on the standoff distance which is maintained by the bollards, boulders, walls ect. I imagine a stopping distance of around 1 meter is acceptable as I had seen...

There is no requirement for testing just a compliance statement requiring it stop a certain vehicle weight going a certain speed. I am curious as to how you sized your boulders prior to testing. I had thought this would be a standard somewhere in the US based on rounds of testing or something by...

Current specification is for boulders which are 1800 kg minimum. Material is limestone. Partially embedding the boulder in the soil is also an option provided it extends 600 mm above grade. A stopping distance was not specified however I have seen 3 ft referenced in a couple of places which...

I am trying to find guidance into sizing of boulders for use in a security barrier perimeter in order to resist vehicle impact. Vehicle Mass: 1800 kg Vehicle Speed: 50 kph Any advice would be greatly appreciated.

Thanks Ralph, I did search the forums prior to my post and I had previously found two of your suggested links. Even after reading them, though they were helpful, they were not entirely what I was looking for. I understand most of these barriers are crash tested to be certified for stopping a...

I am looking for advice on the design of reinforced concrete security walls designed to stop an 2000kg vehicle travelling at 50kph. Is there any available design guidelines for this topic? I am basically estimating the deceleration to determine the impact load and then designing a wall to resist...